Park Tool OBW-3 Offset Brake Wrench giant The PC 1091R chain is

The PC 1091R chain is silky smooth

increased rigidity

Easy to Clean

Ensure the surface is clean and not washed with softeners or other additives before treating with Dr

Gearing levels cassette: 12-speed

Park Tool OBW-3 Offset Brake Wrench giant The PC 1091R chain isThe Park Tool OBW 3 is a specialty wrench designed for the installation and adjustment of side pull and dual pivot rim brakes. Its unique offset design and thin profile (2. 1 mm thick with 6. 5 mm fingers) allow it to access tight places where standard wrenches would be impractical. The OBW 3 features a 14 mm open end wrench and a spring holder tool for engaging the brake tension spring that is accessible on some side pull brake calipers. Mfr Claimed