JT underbone drive chain set with HPO O’ Ring chain and JT sprockets for HONDA ASTREA 100 1991-1998.
JT sprockets are made from top-quality steel:
- Rear sprockets made of C45 hardness steel using the heat induction method.
- Front sprockets made of SCM alloy steel (chromium-molybdenum) with full hardening.
The black color on the rear adds extra mileage durability with ZINC coating.