Choosing the right crank length for your gravel bike isn’t just a matter of leg length or tradition — it’s a performance decision that influences power delivery, cadence, and ride quality over mixed terrain.

Most gravel bikes come stock with 170mm or 172.5mm crankarms, a middle-ground solution for many riders. But depending on your goals and body mechanics, a different length might serve you better. 

Shorter cranks, such as 165mm, reduce knee and hip strain and improve ground clearance, which is especially helpful when navigating ruts, rocks, and tight switchbacks. They also promote a smoother pedaling circle and allow for higher cadence — ideal for long-distance events and riders with a fast spin style.

On the other hand, longer cranks like 175mm provide greater leverage, which can benefit stronger riders tackling steep ascents or riding with heavy bikepacking loads. However, they may place more stress on joints and reduce clearance in rough terrain.

Learn how crank length affects your gravel riding. Discover the pros and cons of 165mm, 170mm, and 175mm cranks for cadence, control, and terrain efficiency.

The key is finding a balance that matches your physiology and your riding style. QO GRAVA cranksets, for example, are available in multiple lengths (165, 170, and 172.5 mm), allowing gravel cyclists to choose the most efficient setup. 

Each set is built with high-modulus carbon and KevTex™ reinforcement for durability on rugged surfaces, so you’re not forced to trade weight for strength.

Crank length affects more than just leg extension — it changes how your whole bike feels under power. Take time to experiment or consult a professional bike fitter.

For riders pushing boundaries on dirt and tarmac alike, the right crank length can unlock a smoother, more efficient ride.