Sprocket finder

Name the outcome, read the pairs

The instrument answers "what does this pair do to my bike?". This page asks it backwards: say what you want the bike to do, and it lists the sprocket pairs that land nearest, each with what it costs you in chain and axle. How the numbers are made.

The finder searches every legal sprocket pair as you type and needs JavaScript. Nothing here tracks you — there is no server to talk to. The same math, one pair at a time, is on the instrument.

Bike

What you want

Change vs stock — percent Positive is shorter · negative is taller

Rear tyre Circumference exact · fitment not modeled

Units

Pairs that land nearest

Exact ratio math · chain and axle modeled

Loading the catalog…

Sprocket pairs, ordered by distance from the target you named. Not a ranking — the order is arithmetic.
Sprockets	Achieves	Vs stock	Chain	Axle, same chain	Redline in top	Per 1000 rpm

Front / rear teeth · tap a pair to open it in the instrument. Ratio, speed and rpm are exact. Chain links and axle shift are estimated from a nominal 585 mm centre distance — measure your own bike before you order.

Open in the instrument See it turn