Zinn Custom Bike Cranks
At Zinn Cycles, our team is here to provide custom bicycle crank lengths for people of all shapes and sizes. Whether you’re looking for long, short, or proportional bike crankset sizes, Zinn Cycles offers the widest range of bicycle crank lengths in the world.
Extra Long Cranks
If you have long legs, you’ve probably noticed that you can’t use all your power with standard size crank arms. With our custom long cranks, you will get more power and efficiency! Our extra-long bike cranks are available from 180mm to 220mm long.
Extra Short Cranks
Made for people with shorter legs, a set of our custom extra-short bicycle cranks deliver more comfort and efficiency, as well as that sweet smooth spin you want. Our extra-short cranks are available from 130mm to 165mm.
Proportional Crank Length
Since your muscles and joints work most effectively when operating within a specific range of motion, riders need the right fit to ensure efficient cycling. Proper bike crank length is crucial to a rider’s experience. Zinn Cycles is one of the only manufacturers in the world that makes cranks outside of the standard 165 – 180mm range. We offer cranks from 130mm to 220mm so that no matter how short or tall you are, you will be able to get a crank that is within the proper proportion of your leg length.
What Length is Best?
Your ideal crank length for road and gravel riding is about 21% – 21.6% of your leg length. For mountain biking, we go a little shorter, as short as 18-20% of leg length. Start by measuring your inseam with your feet 2″ apart. Be sure to measure from the ground to the pubic bone. Convert your inseam measurement to millimeters and multiply by .205 and then by .215 (.19 and .205 for mountain bikes). This will give you a range of bike crank sizes that are appropriate for you.
After a short adjustment period, the new crank length will begin to feel more natural. Everyone who rides with the recommended bicycle crank length from Zinn Cycles experiences more power, easier climbing, less fatigue and joint pain, and better overall performance from their bike.
Zinn Cycles Crank Options
Road/Gravel/Track Cranks
Explore our inventory of proportional-length bicycle cranks for road bikes, gravel bikes, cross bikes, and track bikes. We offer a range of options to fit into any budget, and we can accommodate any of the new press-fit bottom bracket standards that are found on many modern bicycles as well as more traditional threaded bottom bracket shells.
Contact us with any questions or if you are not finding a crank that will work on your bike.
Mountain bike Cranks
You’ll find several models of mountain bike cranks available, suitable for all chainring combinations including 1×11, 1×12, 2×10, 1×10, 3×9, and 3×10. We have a range of mountain bike cranks for different price points. We can accommodate all different bottom bracket standards including threaded and press fit. We also have options for Fat Bikes with threaded bottom brackets.
Bottom Brackets and BB Adapters
With so many new bottom bracket standards, it’s hard to know what is compatible with your bike. We’re here to make it easy! We can accommodate almost every different bottom bracket standard with our cranks. Please browse our bottom brackets to find the bottom bracket that you need for your bike. There are a lot, so don’t hesitate to ask us questions. We are here to help you figure out which one works with your bike.
Have questions or can’t find what your specific bike model needs?
Contact us for help finding the bicycle crank and/or parts you need.
No matter where you live in the world, we will work with you to make sure the fit of your Zinn bike is absolutely perfect. We offer a full service in-house bike fitting for those who can make it to Boulder, Colorado and we also have detailed measurements instructions for those who cannot make it out for an in-house fitting. We are also happy to work directly with a bike fitter in your area, and we offer upgraded 3D bike fittings at the Boulder RETUL Center.
