Track Cycling Stem Length Calculator

Setup preset Sprint and Bunch presets auto-fill typical bar values. Choose Custom to edit manually.

Frame front centre (BB to front axle), mm

Frame reach, mm

Frame stack, mm

Handlebar reach, mm

Handlebar drop (saddle rails to bar clamp), mm Measure vertically from saddle rails to handlebar clamp centre.

Spacer height, mm

Saddle height (BB to saddle rails), mm

Recommended stem length

Recommended stem angle

Assumes a typical track head tube angle and UCI-legal forward position.

FAQ: Why are long stems normal on track bikes?

Because modern track positions are built around UCI limits

Track riders often aim to place the handlebars close to the UCI forward limit (up to 100 mm in front of the front axle). As frames have evolved, this typically requires longer stems than road bikes to reach the same legal bar position.

Because reach is not the same as how far forward your bars can go

Frame reach mainly tells you where the top of the head tube sits. On modern track builds, the handlebar position is driven more by front centre and the UCI forward limit, so stem length becomes the tool used to place the bars correctly.

Because bar designs vary a lot in reach

Sprint bars often have a much shorter reach than bunch/endurance bars. A shorter-reach bar usually needs a longer stem to place the hands in the same spot. That is why two riders on the same frame can legitimately use very different stem lengths.

If my result is over 200 mm, is that a problem?

It is a sign the frame may be too small for your target UCI-limit position. In most cases, a larger frame (more reach/front centre) is the cleanest solution, then re-run the calculator.