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- Chain line gauge
- JA Stein "Chainline Checker"
- Fits 5-9spd cassettes
- Double/triple cranks
- Chain line reference tool fits between the chainrings and cassette cogs
- A calibrated measuring indicator shows the correct settings for 5-9 speed cassettes
- Tool rigidly attaches to the outer chainring of the crank, works on double and triple cranks
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