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Built on a wave-profile shell
Atlas offers greater articulation
The handlebar has a width of 420 mm with a 6° flare
0 is an ultra-light road helmet built for those who push to the limit
Shimano BB-UN55 BSA Bottom Bracket Set Matte Black Built on a wave-profile shellThe Shimano BB UN55 is often cited as the gold standard for square taper cartridge bottom brackets. It combines high quality sealed cartridge bearings with a hollow spindle to deliver exceptional durability and smooth pedaling. This unit is a favorite for commuters and touring cyclists because its "set and forget" design requires virtually no maintenance once installed. Built with a sturdy metal left hand cup (unlike the plastic versions found on
