Chain extension ratio checker. Very easy to check chain extension ratio.
Chain sizes from 420,428,520,525 and 530 can be checked.
Gauge for chain play on the body
Recommended for the DRC-ZETA Chain Checker
Product title
Vendor
$19.99 | $24.99
Product title
Vendor
$19.99 | $24.99
Product title
Vendor
$19.99 | $24.99
Product title
Vendor