Fit Better – Ride Better

High-Quality Custom Parts & Bike Components

Our mission is to help everyone fit better on their bike so no matter how big or small you are, you can still be comfortable on a bike and really enjoy cycling. This page is dedicated to all the different components that we offer to help you fit better on your bike. Our custom parts for bikes include cranks, forks, stems, handlebars, seat posts, saddles, and more so that you can find something that really works for your bike and your body. Please let us know if you are not finding what you need. We will help you find it or start carrying it in our store.

Derby brand bike tire.

Custom bicycle wheels

The bicycle wheel is one of the most crucial parts of the bike that can be custom-made. A stiff, strong wheel will provide a nice responsive ride quality, great handling, and quick acceleration while also staying true for many miles. Zinn Cycles has more experience building super strong wheels for extremely heavy riders than anyone else out there. We can build aluminum and carbon wheels for riders of any size, and we build for any wheel size and type as well as any hub spacing you need. From track bikes to fat bikes, we take pride in providing quality bike components. We will build you the best set of wheels you’ve ever ridden.

Custom Length Cranks

If you have longer or shorter than average legs, you should be riding longer or shorter cranks. We offer many options for proportional, custom-length bicycle cranks and other parts for road bikes, gravel bikes, cross bikes, mountain bikes, and track bikes. We have a variety of models with a wide price range. Click here for more information about custom length cranks and to find out what length is best for you. A proportional length crank may be the most beneficial quality bike part to upgrade your bike.

Custom length bike crank.

Handlebars

Wide handlebars for road bikes, gravel bikes, and mountain bikes are available to order through our website. No longer do tall cyclists have to rely on a handlebar that isn’t wide enough for broad shoulders. All of the handlebars we offer are very high-quality, custom bike parts from reputable brands.

Black bike handlebars.

Forks

We have a wide range of bicycle forks that have extra long steering tubes in order to help taller cyclists fit better on their bikes. We offer steel and carbon fiber forks with extra long steering tubes so that you can dial in the fit of your bike. These quality custom bike parts and components are a great upgrade for your bike and will last a long time.

Duro brand bike fork.

Stems

The stem is an important part of making a bike fit properly, which is why we sell longer stems, custom stems, and travel stems for every application.

Silver bike stem.
Black and blue bike saddle.

Seatposts and Saddles

Along with all of our other custom bike parts, we sell extra long and strong seat posts and saddles that really fit. The saddles we carry come in a variety of widths designed to match perfectly with your sit-bones. You can even come into our store for an in-person sit-bone fitting to determine the best saddle for you.

Bike fitting

Bike fitting included with every Zinn bike frame

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 measurement 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.

Are You Ready for Your Dream Bike?