BRAAP FACTORY / GARAGE TOOLS

Gearing
& chain
 length
calculator.

Compare sprocket setups, see the change in final-drive ratio, and estimate the chain length you need—all in one place.

GEAR RATIORIDE CHARACTERCHAIN LENGTH
A real 420 gold chain with black rivets fitted around a Sunstar front sprocket and Braap Factory Cobra CX65 rear sprocket.

SETUP COMPARISON

Stock vs. new

Enter the bike’s stock setup and chain length. We’ll calculate the gearing change and recommend an even chain-link count.

01Stock setup

Factory baseline

02New setup

What you want to compare

VIEW GEAR RATIO CHART
STOCK SETUP REQUIRED

Enter the stock front and rear sprocket tooth counts to compare setups.

HIGHER RATIO

Quicker acceleration

A larger rear or smaller front sprocket improves drive out of corners, with less top-speed potential.

LOWER RATIO

More top-speed potential

A smaller rear or larger front sprocket stretches each gear, with a softer hit off the bottom.

CHAIN ESTIMATE

Start with enough links

The estimate accounts for tooth-count and swingarm changes, then rounds up to an even link count.

READY TO BUILD IT?

Dial in your drivetrain.

SHOP CHAINSSHOP SPROCKETS

Ratio comparisons and chain-length recommendations are estimates. Final fit can vary with axle position, suspension geometry, tire size, and adjuster range. Always verify fitment before removing links or riding.