Parts & Accessories

With the SXg, MRP delivers a guide without compromise and with no equal. No longer does the desire for protection and both upper and lower retention have to come at the expense of weight, efficiency, or the addition of moving parts - have your cake and eat it too. With the SXg covering all those bases, it’s the first guide in history that’s equally at home on anything from aggressive, short-travel bikes to Armageddon-ready Rampage rigs, and everywhere in-between. It’s a guide that refuses to be pigeon-holed, blurring the lines between typical industry definitions - a little country and a little rock, as they say. But, in this case, it’s a whole lotta rock. High-security chain retention and bulletproof chainring defense in an innovative, lightweight package with zero efficiency loss make the SXg ideal for a wide range of uses. Whippersnapper™ technology provides lower retention without moving parts or friction. The most advanced chainguide on the market, the SXg is the go-to of the top Rampage stuntmen, World Cup downhill pilots, and superhuman enduro tacticians. - Whippersnapper™ lower guide. - Full-size, nylon HD upper guide with co-molding. - Integrated SX skid provides safeguard to the chainring and glides over rocks and obstacles. - Nylon and TPU co-molding in the Whippersnapper™ provides durable protection from external blows and mutes internal contact with the chain. - Swingset™ hardware. - All installation and adjustment operations are possible with just a single 4mm HEX wrench. - Available in 30-34t and 34-38t sizing. - Alloy guides compatible with chainlines 49mm and wider, carbon 50mm and wider. Boost 148 compatible. - ISCG-05 only. - 149g (34-38t Alloy ISCG-05)

Whether you're looking to take your training to the next level or you simply want a better way to measure energy expenditure, a power meter is your best bet. And, the Power Cranks Ultegra Upgrade Kit is no exception. With our lightweight power sensors on a Shimano Ultegra crankarm, it's the perfect way to enter the power meter game. The development of Power Cranks began with our Human Performance Team looking at riders in realistic scenarios on the bike. Historically, power meters have been validated by two different methods—one is by measuring the produced torque by applying a static, linear load to a crank arm or chainring, while the second uses a power generating motor to pedal the bike. Well, cycling is neither static nor linear, and humans apply power much differently than a machine. So, we found that neither of these methods answer the "real-world" accuracy question. To get the best test for accuracy, in all types of riding scenarios, we built our own cycling treadmill, the WinMill, to measure power output to a known truth. This new benchmark lets us evaluate accuracy under all riding conditions—seated versus standing, various power and cadence levels, different weights, and carrying various types of gear. This data acquisition process is our gold-standard for testing power meters, and through our testing and external validation from the Locomotion lab in Boulder, Colorado, Power Cranks have been proven to have the highest accuracy in real world scenarios (+/- 1.5%). The Power Cranks are also easy to live with, with class-leading temperature compensation firmware and waterproof enclosures. Calibration is only required during seasonal-type fluctuations in temperature, and the included wrench makes battery swaps a breeze. - -/+ 1.5% real-world accuracy tested on the WinMill and validated by the Locomotion Lab in Boulder, CO. - Works with ANT+ and Bluetooth devices. - Easy set-up and diagnostics with the Specialized Power app (iOS and Android versions available). - Shimano 8000 generation Ultegra left-side power measurement. - Right crank arm and chainring NOT included.

Whether you're looking to take your training to the next level or you simply want a better way to measure energy expenditure, a power meter is your best bet. And the Power Cranks 105 Upgrade Kit are no exception. With our lightweight power sensors on a Shimano 105 crankarm, it's the perfect way to enter the power meter game. The development of Power Cranks began with our Human Performance Team looking at riders in realistic scenarios on the bike. Historically, power meters have been validated by two different methods—one is by measuring the produced torque by applying a static, linear load to a crankarm or chainring, while the second uses a power generating motor to pedal the bike. Well, cycling is neither static nor linear, and humans apply power much differently than a machine. So, we found that neither of these methods answers the 'real-world' accuracy question. To get the best test for accuracy, in all types of riding scenarios, we built our own cycling treadmill, the WinMill, to measure power output to a known truth. This new benchmark lets us evaluate accuracy under all riding conditions—seated versus standing, various power and cadence levels, different weights, and a myriad of gear. This data acquisition process is our gold-standard for testing power meters, and through our testing and external validation from the Locomotion Lab in Boulder, Colorado, Power Cranks have been proven to have the highest accuracy in real-world scenarios (+/- 1.5%). The Power Cranks are also easy to live with, with class-leading temperature compensation firmware and waterproof enclosures. Calibration is only required during seasonal-type fluctuations in temperature, and the included wrench makes battery swaps a breeze. - +/- 1.5% real-world accuracy tested on the WinMill and validated by the Locomotion Lab in Boulder, CO. - Works with ANT+ and Bluetooth devices. - Easy set-up and diagnostics with the Specialized Power app. (iOS and Android versions available). - Shimano 5800 generation 105 left-side power measurement. - Right crankarm and spider NOT included. - Available in 170-175mm crankarm lengths.

Designed for enduro and trail riding, the AMg V2 Alloy chain guide features an upper guide for chain security and an integrated skid to protect the chainring and frame. - Compatible with 1x9, 1x10, and 1x11 drivetrains - Integrated nylon skid glides over rocks - Softer co-molded upper for quiet operation - Installs and adjusts with a single 4mm hex - Compatible with chainlines 49mm and wider - Tracked and grooved upper guide and backplate increases stiffness

Use these Wheels Manufacturing Crank Spindle Spacers to adjust chainline or bearing play in bottom brackets. - 24mm for Shimano Hollowtech II, FSA, Race Face EXI, SRAM GPX - 30mm for BB30, PF30, BB86, BB92 and other cranks with 30mm spindles - Machined engineering-grade Delrin - 10 spacers per bag

Replacement crank bolt and puller cap set for Race Face Cinch cranksets.

Race Face Crank Spiders allow a quick swap between chainring options on the Race Face CINCH crank system.

Easton spider and ring assemblies for CINCH cranks.

Spindle and hardware kit for Race Face CINCH MTB and fatbike cranks.

- Chainring bolt sets are available in sets of four or five - Bolts have 5mm hex heads - Material: Steel - Type: 2x

Race Face Cinch aluminum crank arm bolt. 18mm, fits XC/AM cranks.

Utilizing MRP's patented integrated skid (US Patents RE 42,436 / 8,235,849 Patents Pending), the XCg tucks neatly behind your crankset and protects those costly chainrings from damage. The replaceable nylon skid glides over rocks and obstacles. - Great accessory to protect costly chainrings - Integrated skid protects chainrings and glides over rocks and obstacles - 88g (XCg V2 32t, ISCG-05 model)

- Chrome plated CrMo steel chainring bolt/nut sets (Track is NJS approved)

- Thermoplastic Beavertail protects chainring from impacts - For 1X and 2X drivetrains

- Preload collar for adjusting tension on bottom bracket bearings - For Race Face 30mm Cinch System cranks only

The North Shore Billet 1×11 Spider replaces the removable chain ring spider so that you can run a SRAM XX1 chain ring on Truvativ X0, X01, X1, X9, GX, S2210, and S1400 cranks. There are no mounting holes for the granny ring and the single ring’s position is designed to give a better chain line throughout the entire gear range. The chain ring tabs accept an optional rock ring for All Mountain or Enduro riding.

- Replacement right-side crank arm for Shimano STEPS City E6000.

Choose the Hope Crankset Spider you need for the chainring combination you want. - Interchangeable and replaceable on Hope Cranksets - Single chainring model for use with a single 104BCD chainring with or without bashguard - Double chainring model for use with a 64/104BCD double chainring setup - Allows installation of bashguard on outer position

TruVativ Crank Arm Fixing Bolts - Monocoque carbon crankset with hollow-arm design - FSA Mega Tooth chainring design greatly improves chain retention - FSA BB392 compatibility allows use in nearly any frame - Bottom bracket not included

Wolf Tooth's CAMO stands for Chainline and Material Optimization. Available in various chainlines and spider configurations, CAMO spiders allow the use of previously unavailable chainring styles, materials, and chainlines in a lightweight, modular, and customizable package. These spiders are for use with Specialized S-Works cranksets that have removable spiders/chainrings and are only compatible with CAMO rings and bolts. One chainline option is available for S-Works cranks. The number and letter refer to the mm offset and direction from the mounting face to the centerline of the teeth: - M1 (minus 1mm - dished toward the frame): For 49mm chainline, designed for bikes with 135mm QR, 142mm thru axle, and some 148mm bikes.

Race Face 15mm crank bolt/puller for 2008 and newer Evolve and Ride cranksets.

All-City's lightweight Cross Wizard chainring guard is the perfect addition to a single ring or singlespeed setup. While not a full-on mountain bike ‘bash guard’ these are just the thing to keep your chain on and your teeth intact. Named after the one and only Cross Wizard! (You have to say it like that, with the exclamation at the end.) These are available in 110mm and 130mm bolt circle diameters for all your ‘crossy needs. - Material: CNC machined 6061-T6 aluminum

Used to adjust crank chainline or ensure proper bearing preload when using 30mm spindle cranks. - Inner Diameter: 30mm - Outer Diameter: 41.5mm - Machined engineering-grade Delrin - Sold Individually

SRAM Force crank spiders are for repairing your crank or converting it to different gearing. Available in 110mm and 130mm BCDs.

Replacement spindle spacers for Race Face X-Type XC/AM cranksets.

• Square taper interface • Only includes left crank • 175mm length

Wolf Tooth designed these bolts to be the best on the market. These optimized single chainring bolts have a 4mm hex socket on the bolt and a 6mm hex socket on the nut...that's right, no more spanner for your single ring bolts! These are 6mm long so they work perfectly with any bolt on single chainring that does not have threaded standoffs. - 6mm length - Made in the US out of 7075 Aluminum Alloy - Has hex heads on both the bolt and nut for easy installation - Max torque of 6-7 Nm with light grease on threads only

SRAM’s cranks are strong and tough, ready for any kind of ride. So it’s inevitable that pedal strikes and debris will chip away at the end of the crank. SRAM’s Carbon Crank Boot is an upgrade that combats the wear and tear that comes with hard riding. The boot protects the crank from surface damage and keeps the rider’s style perfectly intact.

Wheels Manufacturing 2.5mm Black Aluminum Bottom Bracket Spacers are for adjusting chainline or bearing play in English (BSA) or Italian threaded bottom brackets.

Crank arm tip protectors for Origin8 Thruster Crank Arm Tip Protectors fit all Thruster Series MTB, Boost, and Fat cranksets. Grab a pair to protect your crank arm tips from abrasions and impacts.

Replacement crank spindle for Easton EC90 SL cranks

Shimano Chainring Bolts - For use with M9000 chainrings

Trail riding can be tough on your gear. The ends of your carbon cranks can take a lot of abuse as the trail rushes underneath you and your bike. Protect your cranks from any damage with Race Face crank boots. Made from a durable Race Face proprietary plastic blend, leave no doubt and go with the originator in crank end protection. Wrap it up and protect the tips! Compatible with: - Race Face - Next SL Cinch (G3) - Sixc Cinch - Chester - Respond - Next/Next SL (24mm Spindle) - Sixc (24mm Spindle) - Most other popular carbon MTB cranks and assorted alloy DH cranks

- Chainring bolt sets are available in sets of four or five - Bolts have 5mm hex heads - Inner Length: M8x7.5mm Bolt (x4) / M8x7mm Nut (x4) - Material: Steel - Type: 1x

- Lower slider replacement parts for E-13 chainguides

Trail riding can be tough on your gear. The ends of your Next SL G4 cranks can take a lot of abuse as the trail rushes underneath you and your bike. Protect your cranks from any damage with Race Face crank boots. Made from a durable Race Face proprietary plastic blend, leave no doubt and go with the originator in crank end protection. Wrap it up and protect the tips!

The Easton Spider and Ring assembly features the Cinch Direct Mount System, making a swap between ring configurations a fast and simple procedure. This system also provides a significant weight savings by eliminating the material overlap and extra bolt hardware that is required for a traditional spider with chainring configuration. - EA90 Aluminum

- Horizontal square interface - Only includes left crank

- Crank Construction : HOLLOWTECH II - Optimum power transfer

Wolf Tooth's CAMO stands for Chainline and Material Optimization. Available in various chainlines and spider configurations, CAMO spiders allow the use of previously unavailable chainring styles, materials, and chainlines in a lightweight, modular, and customizable package. These spiders are for use with the SRAM cranksets that have removable Direct Mount spiders and are only compatible with CAMO rings and bolts. Four different chainline options are available. The number and letter refer to the mm offset and direction from the mounting face to the centerline of the teeth: - M8 (minus 8mm - dished toward the frame): For 49mm chainline, used with GXP and long-spindle BB30 cranks. Designed for bikes with 135mm QR, 142mm thru axle, and some 148mm bikes. - M5 (minus 5mm - dished toward the frame): For 52mm chainline (Boost) - M2 (minus 2mm - dished toward the frame): For 49mm chainline on short-spindle BB30 cranks - P2 (plus 2mm - dished outward away from the frame): For fat bikes that have 190/197 rear spacing but use a 100mm-spindle crank. Can also be used to achieve a Boost chainline with a short-spindle BB30 crank.

Race Face direct-mount chainring spider for Cinch ranksets.

- For Race Face 30mm Cinch System cranks only - Allows switching crank arms between bikes, such as a FatBike and an XC MTB - Use RF-2999 for 8mm to 16mm hex wrench adapter to remove spindle

• Square taper interface • Only includes left crank

Replacement crank bolt/puller set for Race Face NEXT XC, SIXC, and 2088 and newer Deus cranks.

Replacement crank bolt for WeThePeople's Legacy crank.

- Replacement left-side crank arm for Shimano STEPS CITY E6000

The G3 features MRP's patented integrated skid (US Patents RE 42,436 / 8,235,849 Patents Pending), which protects critical drivetrain components like the crank and chainring from damage and glides over rocks and obstacles. The skid and lower guide are combined into one solid structure. The skid and lower guide also feature our new attachment system, the Swingset. The Swingset system features a pivot at the forward skid mount that allows the skid to swing down for super easy crank and chainring installation. - Integrated skid protects chainrings and glides over rocks and obstacles - Includes standard pulley and new G-slide slider block for quiet, dependable operation in muddy and dank conditions. - Nylon upper guide - Quietring wrap on the upper guide's tail mitigates chain-slap - 34-38t sizing - Stamped steel backplate - All install and adjustment operations possible with just a single 4mm HEX wrench. - 236g (ISCG-05)

The Wheels Manufacturing 386 EVO Adapter for 22/24mm Spindle Cranks adapts SRAM/Truvativ cranks to 386EVO-standard frames. Simply tap the adapters into the 6806 bearing in the BB shell or cups, then install the cranks using the included spacers to adjust chainline or to take up any side-to-side movement in the crank. - Machined engineering-grade Delrin - 48g/pr Includes - (1) - 24mm ID adapter (for right-side) - (1) - 22mm ID adapter (for left-side) - (8) - 0.7mm spacers

- Series: SLX - Crank Construction: HOLLOWTECH II Technology

Secure your chainrings for your ride with Origin-8's Double/Triple Chainring Bolts. Made for inner triple chainrings, each set includes 5 male bolts to securly connect your chainrings to your crank.

• Adjustable aluminum chain guard • Fits front chainrings from 38T to 48T • Multiple clamp options fit seat tubes from 25.4 to 34.9mm • Black anodized finish

- Super-light, dual ring chainguide with 6061-T6 backplate without direct mount bashguard - Replaceable upper sharkfin wearplate prevents chain drop and allows front shifting - Includes two dual-position lower rollers, one for stand-alone use, the other is compatible with 32t, 36t and 40t - Turbocharger bashguards (sold separately) for optional bash protection - ISCG-05 models are adjustable for 48-53mm chainlines - BB mount guides are chainline-specific for standard cranks - 95g - Range: 32-40t

For Race Face 30mm Cinch System cranks only. Use RF-2999 for 8mm to 16mm hex wrench adapter to remove spindle. - 30 x 136.5mm is for 120mm spaced BMX hubs and 68/73mm BBs - 30 x 151.5mm is for 150/157mm Hubs

Race Face 12mm crank bolt/puller for Respond, Chester, and Ride DH cranksets.

Forged AL6061-T6 alloy spiders for Origin8 Thruster Series modular cranksets - SRAM 3-bolt interface for crank arm mounting - Available in both single and double chainring configurations for MTB, Boost/Fat, and Road/Cross/Gravel applications - BCD: 104mm 4-Bolt - Type: 1x

The new G4 picks up where the famous G3 left off — three consecutive appearances in the Dirt 100 issue, as well as countless World Cup and FMB podiums made it the most sought after full-featured guide on the market. Upgrades to the G4 include a new co-molded upper guide that utilizes a softer durometer TPU material on the interior walls and ceiling to silence drivetrain chatter. An improved material formula is utilized in the updated skid — making the best even better. - NEW Full-size, nylon upper guide with co-molded TPU material on the interior walls and ceiling that silences chain contact. - Integrated skid protects chainrings and glides over rocks and obstacles. - Includes standard pulley and G-slide slider block for quiet, dependable operation in muddy and dank conditions. - Compatible with chainlines 50mm and wider (55mm and wider on 83mm BB shells)

Wolf Tooth's CAMO stands for Chainline and Material Optimization. Available in various chainlines and spider configurations, CAMO spiders allow the use of previously unavailable chainring styles, materials, and chainlines in a lightweight, modular, and customizable package. These spiders are for use with the RaceFace cranksets that have removable Cinch spiders/chainrings and are only compatible with CAMO rings and bolts. Three different chainline options are available. The number and letter refer to the mm offset and direction from the mounting face to the centerline of the teeth: - M8 (minus 8mm - dished toward the frame): For 49mm chainline, used with GXP and long-spindle BB30 cranks. Designed for bikes with 135mm QR, 142mm thru axle, and some 148mm bikes. - M5 (minus 5mm - dished toward the frame): For 52mm chainline (Boost) - P2 (plus 2mm - dished outward away from the frame): For fat bikes that have 190/197 rear spacing but use a 100mm-spindle crank

- Octalink bolts include steel washers, JIS includes black plastic caps - HT2 mount bolts (low torque plastic, except XTR-M970 aluminum) are for mounting non-drive arm - Hollow bolts (SH-21504) not recommended for non-treated spindles

This very light, stiff, and strong carbon crank spider optimizes your power transfer. - Stiff and lightweight. - For use with S-Works carbon road cranks.

Race Face Crank Arm Tab Spacers • Spacers are used to protect the outer chainring tabs and enhance aesthetic when no outer ring or bashguard is used • Fits all Race Face cranksets • Use double bolts