Shimano BB-UN300 Square Taper Bottom Bracket - 68x118mm ENVEMARCH Several years of research produced

Several years of research produced those innovations that make the Shimano Dura Ace R9200 even faster

The saddle rails have a highly oval shape and gain extra stability due to the special fiber orientation and reinforcements and resist any potholes and bumps on or off-road

With the AM30

make accurate adjustments to gears or derailleur (even while pedaling) and carry out any kind of diagnostic check

Shimano BB-UN300 Square Taper Bottom Bracket - 68x118mm ENVEMARCH Several years of research producedThe quality and performance oriented Shimano BB UN300 cartridge bearing bottom bracket features a JIS square taper mount and is designed for frames with BSA thread and 68 mm shell width. A stabilizer ensures a constant chain line. Specifications Adapter: aluminum (left), aluminum steel (right) Axle: steel Mfr Claimed Weight TBC