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Parts

$9.49
Giant's inner tubes are made from high-quality, standard weight rubber so you can keep on rolling. - Valve length: 48mm
$15.99
This rim tape is crucial in upgrading your Tubeless Ready (TLR) Bontrager wheels to the next level of dependability and performance. - TLR Rim Strips are the light and easy solution to Bontrager Tubeless conversion - Tape is designed for wider Plus and Fat wheels - Can also be used as a universal tubeless solution for non-Bontrager rims - Use only with Bontrager TLR rim valve with round base - Rim tape replacement is recommended if removed from the wheel - One roll is 5m (197") in length
$99.99
Enjoy comfortable performance on long rides with the Yatra Comp women’s saddle. The CRZ enhances soft tissue protection, and a wider nose maintains comfortable stability. - Performance Posture 3 for pelvic rotation with a balance of comfort and efficiency - Hollow Chromoly rails increase compliance for ultimate comfort - Wider cutout and shaped nose yield stable comfort in an aggressive position - Women Specific Design is engineered to yield better fit and comfort for women - Recessed saddle cavity provides contour relief zone and eases pressure on soft tissue - Size Specific Curvature ensures each saddle is designed specific to its width - Nylon composite shell
$54.88 - $54.99
Magura mdr-c ebike disc rotor - 203mm center lock w/ lock ring for thru axle silver The Magura MDR-C disc brake rotor is an ideal all-rounder – for city, trail and e-bikes. The improved lateral rigidity reduces vibrations and noise during braking, and also has improved heat resistance and increased stability. - Optimized for eBike use - Prepared for tone wheel or magnet - Wear optimized ring design - Equipped with a center lock mount for corresponding hubs - Center Lock with lockring for thru axle (tool opening engagement)
$65.00 - $94.00
SRAM's PG-1130 11-Speed Cassette is constructed of heat-treated steel cogs and boasts SRAM's PowerGlide tooth profiles and shift ramps for quick, positive gear changes. This excellent cassette also sports an aluminum spider construction for a maximum stiffness-to-weight ratio, a durable steel lockring, and comes in three wide ranges to suit your riding style.
$45.00
Get sharp, dependable X-Actuation shifting with SRAM's GX 2x11 Rear Trigger Shifter. This right-side rear shifter is compatible with SRAM’s 2x11-speed components, offering precise, swift shifting across their wide-range 11-speed cassette. • Dedicated 11-speed rear trigger shifter • Multi-position mounting • Discreet clamp • Aluminum pull lever • MatchMaker X compatible • Weight: 122 grams
$39.99
Tannus Armour is the ultimate in tire protection and performance for all levels and styles of riding. Sitting between your tire and inner tube, the Tannus Armour provides 15mm of puncture protection on the top, as well as 2mm of sidewall protection from sharp objects and rocks. Whether you are a city biker, adventure tourer or prefer the off-road, downhill or gravel trails, Tannus Armour gives you increased grip and vibration dampening for a smoother, more comfortable and enjoyable ride. - Patented Aither Technology; Aither is a multi-cell foam compound that forms the structure of the Armour
$32.00
Emergency derailleur hanger is designed to temporarily replace a hanger that is damaged or broken on a ride. Anchored in place by the rear quick-release it allows the use of most gears, and more importantly, for the bike to be ridden instead of pushed or carried. - Fits most frames that use a quick-release rear hub - Provides nearly complete shifting range - CNC machined 6061 aluminum - Black anodized finish - Made in the USA
$154.20
Service your DT Swiss star ratchet hubs and wheels with DT Swiss Ratchet and Kits. - DT Swiss EXP 54 Tooth Upgrade Kit w/ Bearing
$6.00
Customize your ride with SRAM bar end plugs.
$45.00 - $50.00
Tall teeth with alternating tooth profiles hold the chain amazingly well and still provide space for mud to clear. - Full CNC Aluminum rings - Ring Position/Type: Chain Retaining Single Ring - Drivetrain Speeds: 10, 11 - Chainring BCD: 110 SRAM Asymmetric
$40.00
Giant's Revel Tire has lots of volume and plenty of grip with its all-conditions tread design. A near-continuous center tread rolls fast over a variety of surfaces, and large side knobs bite hard in corners and the loose stuff.
$710.00 - $764.00
The heart of the connected cadre. The SRAM RED eTap AXS rear derailleur is AXS enabled for easy personalization and designed for both 1x and 2x systems. Advanced chain management keeps it silent and secure no matter the terrain. The derailleur also comes with faster pulleys, bearings, motors, and signals, improving speed in every way. - SRAM AXS-enabled for easy personalization - Orbit chain management technology keeps drivetrain quiet and secure - A single rear derailleur for all gearing combinations, including 1x and 2x - Improved motor and signal travel for faster shifting - Larger X-SYNC pulleys and ceramic bearings for increased durability and efficiency - Compatible with existing eTap batteries - Battery sold separately
$483.00
The XG-1299 cassette completes the expression of the world's most accomplished and sought after bikes. Designed for use with our proven, reliable XD driver body, this 12-speed cassette offers a massive gear range. In independent tests, the X-Dome architecture is proven to yield the strongest cassette on the market. New shifting characteristics improve both inboard and outboard shifting as well as chain retention. - SRAM’s cassette manufacturing technology provides the greatest durability and lightest weight - All-new shifting features create a smoother, quieter system with enhanced inboard and outboard shift performance - XD driver body compatible Cogs - 10 – 50T: 10, 12, 14, 16, 18, 21, 24, 28, 32, 36, 42, 50 - 10 – 52T: 10, 12, 14, 16, 18, 21, 24, 28, 32, 36, 42, 52
$19.99 - $39.99
The Shimano EF500 8-Speed dual brake/shift lever features reach adjust technology and an optical gear display. - Equipped with a reach adjust mechanism that allows for the distance from handlebar to lever to be adjusted in order to suit any hand size and riding preference - The optical gear display tells you which gear position is selected while riding - Compatible with V-Brake, Mechanical disc brake (MTB)
$20.99
These rim strips are crucial in upgrading your Tubeless Ready (TLR) Bontrager wheels to the next level of dependability and performance. Key features: - To be used exclusively with Bontrager 29"/700c Tubeless Ready (TLR) wheels - TLR Rim Strips are the light and easy solution to Bontrager Tubeless conversion - Rim Strip replacement is recommended if removed from the wheel - For specific compatibility, access 'WHEELS' tab on the Tech Site or contact Customer Service
$63.99
Super-smooth steering, quality materials, cutting-edge design and serious durability are all hallmarks of Cane Creek headsets. The 40 Series has light, tough, and beautiful machined 6061 T6-aluminum cups that are internally relieved for even more gram shaving. You also get Cane Creek's corrosion-resistant black-oxide sealed bearings and quality seals throughout to keep the grease in and the dirt out, including Cane Creek's Clip Seal that completely seals the top assembly.
$37.00
Shimano Road brake shoe sets - R55C4 pads - Intended Brake Type: Caliper - Pad Attachment Style: Bolt-In (Caliper) - Rim Compatibility: Standard
$69.99
Built on the same concept as our Gravelking and Gravelking SK models, the EXT version incorporates the same technology on top of a specially designed tread tailored to work best in muddy and sloppy conditions. Better puncture resistance while retaining the superb balance of a light riding feel and grip. - Ideal for gravel and dirt, Mud/Loose condition model, better puncture resistance while retaining the superb balance of a light riding feel and grip - Available in Black Tread and Black or Brown Wall Colors - Folding (Aramid) Bead with ProTite Shield Plus Protection - Available in 700 C and a variety of widths - TLC in widths 33mm and larger
$21.00
- M-Pulse front axles incorporate drive-side end cap and rear axles the non-drive side end cap - Neo OS axles are steel and compatible with standard Neo hubs for riders looking for a steel option - Instructions and hub axle determinations are available
$24.99
A kid-sized MTB tire with all of the technology and performance of the larger sizes. Kid-friendly fit, grown-up performance The XR1 Kids' is a durable, kid-friendly tire with the same reliable traction and performance as the grown-up versions. It rolls fast, features a versatile tread for a variety of trail conditions, and keeps weight down so little rippers can quickly gain speed and keep momentum through corners and up hills. Product details - Excels in firm and fast conditions - Offers fast-rolling and predictable cornering with consistent traction Specifications - Size: 12" x 2.25" - Diameter: 12" - Width: 2.25" - TPI: 27 TPI - Durometer: 60a - Bead: Wire - Type: Clincher - Max pressure: 50psi - ETRTO: 57-203 - Weight: 615g
$25.99 - $44.99
Shimano's disc rotors provide a sturdy and reliable braking surface to slow you down. The design is optimized to clear mud and dirt from the system for all-conditions braking. Continuously cooling itself, this rotor helps keep brake power consistent and improves pad life.
$40.00 - $140.00 $40.00 - $140.00 Up to 36% Off
KMC X12 chains feature a double X bridge shape for fast and smooth shifting. - Compatible with SRAM 12-speed systems - Double X bridge shape with inner and outer plate chamfering for smooth and fast shifting - Mushroom riveted pins for the highest pin power and allows shifting under heavy loads - 1/2 x 11/128 - 126 Links
$179.99 - $189.99
Race Face's flagship carbon DH rated handlebar just got wider. With the push to 820mm the new Sixc 35 handlebar gives unprecedented control at high speed, just what you need for UCI DH races, high speed park laps, or that next challenging AM adventure. Featuring Race Face's tried and true sweep design to get you in the attack position on the bike and uses their UD carbon wrap that gives the Sixc 35 strength you can believe in at a mind numbing 235g. Save weight and gain control? You just lost an excuse… - Manufactured from UD Carbon with matte clearcoat - Carbon optimized flex for improved small bump compliance - Gold Standard of DH is now wider and stronger - 820mm width for maximum control
$96.00
A rider's cockpit is a rider's sanctuary and the shifter is at the heart of it. Make any refinement, and it better have been made to elevate performance—the X01 Eagle shifter holds fast to these rules. It features a forged aluminum trigger to hold up better to the demands that X01 Eagle riders ask of their machines, and an enhanced lever feel rolling on sealed cartridge bearings, offering more precision through the range of its movement. - Forged aluminum trigger designed to better take abuse - Enhanced lever feel and precision - X01 Eagle Master colorway matches all cassettes and chains as part of the Eagle Colorsystem
$52.99
Genuine replacement parts Praxis bottom brackets feature precise tolerances and quality materials to ensure smooth, quiet spinning for many miles. No more creaking. Smooth operation. Fast bearing replacement. - For use with Trek T47 frames with 85.5mm bottom bracket shells - Compatible with Shimano 24mm cranks
$84.99
Deity's collaboration with global saddle leader SDG Components. An SDG base topped with a Deity foam mold, the Speedtrap uses the highest-quality mid-density EVA foam for resilient durability, a soft synthetic cover for minimal wear, and high-end Kevlar sides to protect your seat while giving you the grip where you need it. - Hollow chromoly rails - Highest-quality mid-density EVA foam - Highest-quality Kevlar sides with embossed synthetic cover - D2 edge flex - provides softened edges for optimal pedal strokes - Length: 280mm - Width: 140mm - Weight: 241g
$36.99
For cross country and all-mountain riding, Dimension Trail Stems provide a broad array of sizing options, rigorously tested to ISO 4210 Mountain standards. - Constructed with AL-6061-T6 aluminum - Shot-peened finish - Dimension stems are not intended for use with carbon handlebars or carbon steerer tubes
$269.99
- Internal Routed, Infinitely Adjustable Design - Simplistic - Fully Sealed Alloy Cage / Stainless Tip Cartridge System - Durable 3D Forged Head - With 7075-T6 Forged Clamp - Featherlight Thumb Actuation - Industry Leading - Intelligent Keyway System - Ensures Minimal Play - Easiest Installation - Cable Head Attaches At Base - Cold Weather Approved - Tested Down To -20C. - 1x Lever included - With Premium Jagwire Lex Slick Housing, Stainless Cable and Hardware - Remote Position: On handlebar - Cable Routing: Internal - Offset: 0mm - Clamp Type: Standard, double bolt - Seat Post Material: Aluminum - Seat Post Weight: 510g
$86.99 - $99.99
- High-performance gear combinations provide superior rider choice - Hub body to fit a variety of bikes from MTB to road - Model Number: CS-HG800-11 - Series: Shimano - Average Weight: 335 grams
$5.99
Upgrade or refresh your Bontrager wheels. Product details - Replacement, high-quality rim strips that help prevent flat tires - Compatible with nearly all common wheels - Width refers to internal rim dimension - Not Tubeless Ready - Sold as singles
$70.00
At home on singletrack trails and gravel - Aggressive gravel tire - Optimal for off-road touring and adventures - Tubeless Ready (TR) The Ravager is a gravel tire for the riders out there willing to brave aggressive terrain with only their drop bars and a tiny amount of rubber beneath them. While other tires are designed to let you ride beyond the end of the road, the Ravager opens up new line choices, camping spots, and epic adventures where no road ever existed. Raised, square-edged center knobs provide climbing and braking traction on moon dust-covered trails, and oversized cornering knobs keep you and your gear out of the dirt to conquer another turn.
$36.99
MSW 25° stems raise the bar—literally—for what riders can expect from an unassuming stem. Available in lengths from 60-110mm for custom fitting. Rigorously tested to ISO-4210 Mountain qualification standards. - 3D-forged for increased strength, then CNC-machined - 4-bolt faceplate for easy installation - Bead blasted & anodized black finish
$9.99
Shimano Replacement pads for Mountain brake shoes - Color: Black - Intended Brake Type: Linear Pull - Pad Attachment Style: Threaded Post - Pad Type: Replacement Insert - Cartridge - Rim Compatibility: Standard - Shimano Cartridge-type mountain brake pads fit models: XTR BR-M970, BR-M960, BR-M951, BR-M950 XT BR-T780, BR-M770, BR-M760, BR-M750, BR-M739, BR-M737 LX BR-T670, BR-M580, BR-M570 Deore BR-M530, BR-M510 Alivio BR-M430, BR-MC18 Acera BR-M422, BR-M421, BR-M420, BR-M330, BR-T300 DXR BR-MX70 MX BR-M600 - M70R2: Severe condition brake pad, high performance in dry or wet conditions
$65.95
Volume, speed, and consistency. The Cross Boss’ even center tread shelf provides smooth and fast acceleration while more open side knobs help clear muck. A rounded, high-volume profile designed ground-up for tubeless usage provides plenty of room to modulate tire pressure while dual compound, Dual DNA rubber and defined cornering channels keep riders grinning for more turns. From singletrack to the circuit, the Cross Boss is here to bring it. Usage: Cyclocross Conditions: Dry to Damp / Hardpack to Loam - Weight: 400g - Compound: Dual DNA
$129.99
Product specs: - Str tubeless ready - Size: 27.5", 29" - Outside width: 40mm - Inner bead width: 36mm - Weight: 27.5"-515g, 29"-550g - Double wall welded rim (sleeved rims available oem only) - Brake compatibility: disc only - Hole count: 28/32
$21.99
- Fast rolling, durable compound - Continuous center tread for a smooth ride - Directional siping for enhanced traction on wet pavement
$36.99
MSW 17° stems raise the bar—literally—for what riders can expect from an inexpensive stem. Rigorously tested to ISO-4210 Mountain qualification standards. - Tested to ISO 4210 Mountain standards - 3D-forged for increased strength, then CNC-machined - 4-bolt faceplate for easy installation
$19.99 - $29.99
Stare down rough terrain with this burly yet sleek tire. The Utility Player offers comfortable off-road exploration with modern, openly spaced treads and wide 2.25-inch casing. A broad spectrum of diameters gives you choice for fit. You still standing there? - Always check with your rim manufacturer to verify rim & tire compatibility before assembly or use
$34.95 - $34.99
For 29er tires, more than 100g per wheel can be saved with Tubo tubes compared to standard butyl tubes—and almost twice as much space when packaged. Their riding safety is twice as high as for standard tubes and offers maximum protection against a breakdown. The assembly is just as easy as standard tubes. Tubolito tubes are also a lightweight alternative to a tubeless setup. - 42mm valve length
$63.99 - $74.99
GravelKing SK Plus has a semi-knobby tread pattern with a super-tough puncture belt for aggressive gravel roads. GravelKing SK Plus has side reinforcement with Protite and a bead-to-bead nylon puncture belt, resulting in a 4-ply, super-tough casing.
$29.99
When you depend on your bike to get around town reliably, the H2 tire is a no-brainer. It's got a smooth rolling center and great cornering traction for a confident, efficient ride. - Excels on pavement - Smooth-rolling and efficient tread design - Durable enough to prevent punctures from glass and stone - Strong puncture protection without the weight penalty
$50.00
The GX Eagle Transmission (T-Type) chain is the strongest we have ever made. Specifically engineered to optimize Eagle Transmission, this all-new T-Type design features a unique flat top. In addition to this shape maximizing shifting performance and upgrading the aesthetics of any bike, it is developed specifically for the added torque loads of E-MTB thanks to its solid pins that give it incredible strength. - Strongest SRAM chain ever. Specifically engineered for Eagle Transmission. - Flat top profile, unbelievable shifting performance, game-changing aesthetics. - Solid pins, fully approved for E-MTB use
$146.00
Some riders test their limits more than others. For these riders, the GX Eagle DUB crankset allows them to go all in, every day they ride. The best aluminum crankset we make, engineered to deliver consistent performance every ride. Featuring our X-SYNC 2 tooth profile chainring for complete chain control, each tooth's thickness is toleranced and controlled to work seamlessly with the chain's inner and outer links. DUB technology's patented spindle design and bottom bracket provide a uniform approach to fitment, better sealing, and forward and backward compatibility. Simply put, the forged aluminum GX Eagle DUB crankset is the no-frills choice of riders who know. - Our best aluminum crankset - Direct mount interface compatible with chainrings across the entire Eagle Ecosystem - Master GX colorway as part of Eagle Colorsystem—pairs with all cassettes and chains, from Black to Gold to Rainbow to HardChrome and all-new Copper
$49.99
The Shimano BL-MT200 Hydraulic Disc Brake Lever and BR-MT200 Disc Brake Caliper - Brakes are pre-bled - Hydraulic hose included - Rotor not included
$633.00
The new Reverb AXS XPLR dropper post delivers more control, confidence, and fun on gravel roads everywhere. Getting the saddle out of the way means more room to move, saving you from awkward maneuvering and sketchy descents. We created an all-new design complete with lightweight air-only internals featuring built-in compliance we call ActiveRide. It's like travel for your saddle. Enabled by SRAM AXS technology, Reverb AXS XPLR is part of the ultimate personalized cockpit. - New 27.2mm Reverb AXS XPLR delivers more control, confidence, and fun for gravel - ActiveRide—Air only internals provide a fully rigid top-out position. With the touch of your AXS controller, you've got built-in compliance to ensure comfort and control over the roughest sections of gravel - Two travel options to choose—50mm or 75mm - Saddle clamp options compatible with 7x10 oval carbon rails. - Seat post length includes 400mm and 350mm (50mm drop only) - AXS Technology allows rider customization via the AXS Mobile App - AXS handlebar controls (drop or flat bar) - Shared battery with all other SRAM AXS enabled components - System is completely waterproof and dustproof to IP69K—take it anywhere - SRAM AXS battery and charger included SPECIFICATIONS: - TRAVEL: 50mm, 75mm - POST DIAMETER: 27.2mm - POST LENGTH: 350mm, 400mm - REMOTE: AXS Controller Sold Separately - SADDLE RAIL COMPATIBILITY: Round/Oval (7x9 & 7x10), Round/Oval (7x9) - WEIGHT (G): 562 - WEIGHT BASED ON: 75mm Travel 400mm Length W/O battery - Battery 25g
$29.99 - $31.99
V2 Tubeless valves are stronger, lighter, and even easier to use thanks to the machined aircraft grade 7075 aluminum and Muc-Off's new Tire Insert air ?ow system. The new design features six slots that are machined into the base of the valve stem, allows tubeless sealant ?uid and air to ?ow freely, even when running tubeless tire inserts. - 7075 Machined Aluminum valve stem and cap - Tire Insert air flow system keep air moving freely and compatible with most tire foam inserts - 4mm machined Allen Key slot for easy installation and removal - Includes Valve Core Removal Tool (integrated into spare alloy cap) - Supplied with various rubber bases to optimize fit with multiple rim types
$39.99 - $42.00
The radical new look and feel of SRAM's X-SYNC 2 Eagle chainring is a direct result of SRAM drivetrain engineers studying the performance and wear characteristics of thousands of X-SYNC chainrings. The longer, positive-rake tooth shape has been designed to work perfectly with the Eagle chain to increase chain retention and overall pedaling efficiency, while decreasing friction, noise and wear. - Can be used with Eagle 12 speed or SRAM 11 speed chains - Direct mount rings with 3mm offset fit Boost geometry Eagle cranks; direct mount rings with 6mm offset fit traditional geometry - Eagle cranks and GXP spindle XX1, X01, X0, X1 and X9 cranks
$92.00
The strongest system is a chain with no weak links. Eagle chain links have a smooth radius with no sharp edges or chamfers, which yield a significant reduction in noise, friction, and wear. This design also allows for a flatter plate for more consistent chain riveting and greater overall strength. It's also the biggest contributor to the ultra-smooth, precise, durable, and quiet performance found in the 10-50T cassette and X-SYNC 2 chainrings. Additionally, installation is made easy with a dedicated 12-speed Eagle quick link. - Groundbreaking new chain design and technology - The Eagle chain has been completely re-engineered and is produced with new manufacturing technology. - All-new Eagle Power Lock chain connector with FLOWLINK technology provides better chain-guiding and increased longevity - The Eagle chain is the quietest, strongest, and most wear-resistant chain in the world - Unique features and design also provide significantly improved wear resistance on Eagle cassettes and rings
$23.99 - $42.00
- Tubeless Valve compatible with Stan's ZTR rim - Sold as a pair
$32.92
ESI's ergonomic Fit Grips are designed for a completely natural hand position on your handlebar. Our new designs balance the pressure that your hands exert onto the handlebars, increasing bar control dramatically. XC stands for Extra Chunky. - Made for 22mm bars (can fit applications down to 19mm) - Bar Plugs included - *Install Bar Plugs first for the protection of grips and ease of installation
$19.00 - $25.99
To keep your Avid brakes functioning properly, check your pads for wear and replace them when necessary. Organic compound pads are softer for quieter braking and increased modulation, while metallic pads dissipate heat better and last a bit longer. Two pads, one retraction spring and a mounting bolt are included (enough for one brake) in each pad set. And, choose an aluminum backing plate if you're really counting the grams.
$98.99 - $107.00
The radical look and feel of SRAM's X-SYNC 2 Eagle chainring is a direct result of SRAM drivetrain engineers studying the performance and wear characteristics of thousands of X-SYNC chainrings. They subjected every size of chainring to untold environmental and mechanical tortures, abuse and neglect, in both lab and real-world settings, to come up with a chainring that would augment the Eagle drivetrain’s performance in all conditions. The longer, positive-rake tooth shape has been designed to work perfectly with the Eagle chain to increase chain retention and overall pedaling efficiency, while decreasing friction, noise and wear.
$24.99
Shimano M06 Metal Disc Brake Pads - Fits XTR BR-M965/966/965, Saint BR-M800, BR-M775/765, SLX BR-M665/601, LX BR-M585, BR-M545, BR-M535, Road BR-R505 caliper - Sintered Metal pad with consistent, high stopping power in wet or dry conditions and excellent durability - Ventilated steel backing plate for improved heat dispersion
$25.99 - $31.99
Shimano Altus M2000 Series 9-speed cassette. Combinations: - 11 – 32T: 11-13-15-17-19-21-24-28-32T (bo) - 11 – 34T: 11-13-15-17-20-23-26-30-34T (bn) - 11 – 36T: 11-13-15-17-20-23-26-30-36T (bw)
$13.99 - $18.99
Slick stainless cables undergo a polishing process to further remove imperfections. This creates a smoother surface with lower friction than PTFE-coated cables. With no coating, these are highly durable and compatible with all performance housings and lubricants. Typically used on high-end bikes, by riders wanting improved performance. Pro Polished cables eliminate the need for flaky coatings with an innovative polishing process to reduce friction and improve performance. - Polished stainless steel construction for low friction - Compatible with all performance housing and lubricants - Cables are tinted gold for easy identification
$5.99
Compatible with all tubeless road, MTB and gravel tires. Refill packs with 10 repair plugs (5x thin and 5x thick).
$8.49
Giant's inner tubes are made from high-quality, standard weight rubber so you can keep on rolling. - Valve length: 40mm
$12.99
M21 rear derailleurs are designed to work with 6- and 7-speed Shimano road and mountain shifters. Enjoy the wide variety of bikes you can get going again with M21 rear derailleurs. - Robust composite and steel construction - Compatible with Shimano 6- and 7-speed mountain and road systems
$14.99
Giant's thorn tubes use thicker rubber to prevent some flats and punctures.