Runwell BBLT6 Bottom Bracket Tool

The Runwell BBLT6 is a Japanese-made bottom bracket tool with six hooks designed for traditional NJS bottom brackets. It is developed for lockrings from Shimano, Sugino, and Hatta, as well as compatible Campagnolo lockrings – a type of tool that is now hard to find from other manufacturers.

Thin aluminum lockrings are easily damaged if a regular hook wrench slips or is misaligned. The BBLT6 overlaps about one-third of the lockring, while the silver-colored support plate keeps the tool and bearing cup parallel. This provides a more stable grip, smoother torque transfer, and less risk of damaging the lockring’s hooks.

Runwell develops specialized bike tools with a strong connection to Japanese Keirin and track cycling, and the BBLT6 was created at the request of Keirin cyclists. The 330 mm long steel handle offers good leverage when installing, removing, and adjusting bottom bracket lockrings. This is not a universal tool for modern bottom brackets but the right choice for mechanics and cyclists working with traditional NJS bottom brackets on fixed gear and track bikes.