chain link calculator

The Master Link Chain Calculator

❓ How to measure for this calculator ▾

Chainstay Length: Measure distance from center of crank bolt to center of rear axle.

⚠️ Full Suspension Bikes: You MUST measure the chainstay length while the suspension is fully compressed (let the air out of the shock or remove the spring). This is when the chain needs to be longest.

1. Chainstay Length (CS)

2. Largest Front Chainring (T) The number of teeth on your biggest front ring.

3. Largest Rear Cog (T) The number of teeth on your biggest rear cassette cog.

Required Chain Length

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Note: Result is rounded to the nearest even number. Includes Quick-Link/Master Link. Based on standard “Big-Big” sizing method.

Use this for track bikes, fixies, BMX, or any setup where wheel position determines tension (no derailleur). Precision is key here.

1. Chainstay Length (Center-to-Center) Measure exactly from center of BB axle to center of rear axle in current position.

2. Front Chainring Teeth

3. Rear Cog Teeth

Recommended Length

— Links

Precision Data: Calculated raw length is —.