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Atlas offers greater articulation
Built on a wave-profile shell
0 is an ultra-light road helmet built for those who push to the limit
stiff enough to resist significant flex whether you're pushing or pulling hard at the pedals
Shimano BB-UN55 BSA Bottom Bracket Set Matte Black Atlas offers greater articulationThe 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
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