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lead time: 2 weeks
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At A Glance
The 2XR Crankset stands for “two times radius” and is the brainchild of framebuilder Matt Appleman. Frustrated by cranks that didn’t fit people or bikes well, Appleman designed these with a rider-first approach.
Versatile and modular, these cranks offer up new fit options for a wide array of people and a full fleet of bikes.
Made in USA: designed, CNC machined and finished in Minnesota out of high strength aluminum.
- 100mm and 135-175mm crank lengths: why is crank length is so important?
- 30mm spindles fit almost all road, gravel, mountain/enduro/downhill, and fat bikes: find your type of bike
- No proprietary tools or chainrings: technical specs
- Colors, colors, and a sprinkle of color
Why Crank Length Matters
The Key to a Better Bike
No other component controls so much of the riders motion. Your whole lower body constantly churning with every pedal stroke.
In search of optimizing fit, comfort and efficiency, Appleman’s approach to crank length challenges the archaic sizes commonly found.
After years of knee pain, Matt Appleman found short cranks vital to bike fit and has encouraged all his custom frame customers to ride appropriately sized bike cranks (short or regular length) for the absolute best bike possible.
Want to know more? Read our Rider’s Guide to Crank Length
CRANK LENGTH Calculator
What crank length is right for you? It’s complicated, but as a very rough rule of thumb, use 20% of your inseam to find your crank length
Like getting nerdy with crank length? Find better ways to determine crank length.
Short Cranks for the Win and Comfort
- more aerodynamic position
- reduced pedal strike
- more comfortable
- better frame geometry
- less toe overlap
- less knee, hip and back pain
What Cranks Work for My Bike?
Use ROAD SPINDLE + 110×5 or 110x4SPIDER for road, gravel, CX type bikes or bikes with road drivetrains.
Shimano users: Use the 110×4 Shimano style spider to reuse their existing road chainrings, 11 and 12spd compatible!
For GRX users use Shimano Road (Dura-Ace, Ultegra, 105 etc…) chainrings with 110×4 spider —OR— Praxis sub-compact chainrings with the 110×5 spider. GRX Chainrings will not fit any Appleman spiders.
Sram users: Typically use the 110×5 spider with Praxis Chainrings (10/11/12 speed, Flattop compatible). If you have 11 speed cranks with a 110×5 chainrings, then you can directly reuse those!
Use as 1x or 2x chainring (1x use outside position).
*110×5 SPIDER is compatible with sub-compact Praxis Chainrings (48x32t)!
For the track or fixie bikes, use the Road spindle with 144×5 Track spider.
Q-Factor = 150mm
Use ADVENTURE SPINDLE + 110×5 or 110×4 SPIDER if you’ve got a gravel bike using a widely spaced gravel or mountain drivetrains (like Shimano GRX or similar).
Note 110×4 Shimano style spider fits road chainrings (Dura Ace, Ultegra, 105) and doesn’t fit GRX chainrings.
1x or 2x chainring compatible.
Use ADVENTURE SPINDLE + 104×4 SPIDER if you have a mountain bike that is designed for/accepts narrow Q-factor cranks. Measure your frame to ensure there’s enough clearance between the crank arms and chain stays.
Use outside chainring position for all 1x setups.
Q-Factor 156mm
These suckers are tough!
EFBE Tri-Test (Category 5, Gravity/DH): PASSED!
Use the MOUNTAIN SPINDLE with a 104×4 SPIDER if you’ve got a mountain, trail, or enduro, gravity, DH/downhill bike.
Mounting the chainring on the inner position provides standard/boost chain line while mounting on the outside position provides super-boost chain line.
Q-Factor = 168mm
Use the MID-FAT SPINDLE and 104×4 SPIDER if you’ve got a fat bike with a narrow q-factor (like the Otso Voytek or similar).
Mount the chainring on the outer position.
For some super-boost trail and enduro bikes, the MID-FAT SPINDLE would give you a wide q-factor. Use the 104×4 SPIDER with the chainring mounted on the inside position.
Q-Factor = 183mm
Use the FAT spindle with a 104×4 Mountain spider if you’ve got a fat bike, . Mounting the chainring on the inner portion provides a chainline for 177mm rear ends and mounting on the outside provides a chainline for197mm rear ends
Q-Factor = 201mm
The colors
Like what you see? Explore the Crank Gallery
FAQ’s
What power meters are compatible with 2XR Cranks?
All pedal based power meters! Pedal based power meters are super versatile and you can swap them between bikes very easily. Road and SPD/Mountain versions are available from Favero, Garmin, SRM, and Wahoo (Speedplay). Spider based power meters would have limited the design and versatility of the 2XR Cranks.
are the Cranks Painted?
All the cranks are painted using a high performing, specialty, water-based polyurethane and the best, most finely ground pigments around.
It’s really good stuff and has much lower toxicity, health, and energy impact than other paints or anodizing. See the crank gallery here.
If you’re a heel-rubber, all coatings (ano, Cerakote, or this coating) will wear through eventually.
Is there a direct mount chainring available?
It’s in the works. I have no ETA, but keep your eyes peeled on our email list and social medias.
Can I get 2 different crank lengths?
Absolutely! For those with leg length discrepancies (try shimming first) or limited range of motion on one side (specifically the bottom of the pedal stroke), the 2XR crankset can be built with any combination of available lengths.
For example: 135mm on the Right? 165mm on the left? No problem. To order, configure the 2XR Crankset with the shortest length selected and leave a note with left/right lengths on the checkout page.
Do you offer a 24mm spindle?
I wish we could do it all, but the 2XR Cranks only come with a 30mm spindle. 30mm spindles and bottom brackets are non-proprietary and fit all frames and bottom brackets except Trek’s old BB90/95 standard
Technical SpeciFications
- Material: 2024 Aluminum
- Crank Lengths: 100mm, 135mm, 145mm, 155mm, 165mm, 175mm
- Spindles: 30mm spindle, 5 different widths for road, adventure/gravel, mountain, mid-fat, and fat bikes
- Spiders: Standard spiders for 4 and 5 bolt chainrings (mountain 104×4, road = 110×5, track = 144×5)
- Colors: black, silver, pink, orange, gold, turquoise, purple, olive, sand, midnight blue, Crank Gallery Here
- BB/Frame Standards: BSA (English threaded), ITA, PF30, BB86, BB92 BB30 T47, 386EVO, BBRight, + more (note: BB90/BB95 not compatible)
- Warranty: 5 years
- Exceeds ISO 4210 crank fatigue tested to both “racing” and “mountain” test setups. Tested by independent lab.
- EFBE Tri-Test (ASTM Category 5, Gravity/Downhill use): PASSED 🙂
- The Outer Bearing Width of the BB must match the crank: see Specification Table below
Rider and Mechanic friendly Design
- No proprietary tools or chainrings
- All 2XR parts are interchangeable
- Only 5mm allen wrench for install (torque wrench recommended)
- Trailside friendly adjustment
- Low torque specs (5-10Nm)
- Travel bike friendly (quick + no heavy tools)
- Swap crank arms + pedals between different bikes easily
