CeramicSpeed BB90 Bottom Bracket - SRAM GXP, Black Standard Bearing Bike Accessories_Bike Racks The Coated Bearing has the

The Coated Bearing has the same balls running on a 3-micron thick coating placed on top of those hardened-steel races for greater durability and less friction still

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Made of water-resistant material and zippers to keep your stuff dry

Sport Men's

CeramicSpeed BB90 Bottom Bracket - SRAM GXP, Black Standard Bearing Bike Accessories_Bike Racks The Coated Bearing has theTrek developed their own bb standard to optimize their frame designs. BB90 has a 90. 5mm shell width and 37mm inner diameter and is designed so that the bearings of external cups can hide within the frame. The CeramicSpeed kit comes as two bearings, which are then pressed into the frame. Those two bearings consist of either CeramicSpeed Standard or Coated Bearings. Both feature super smooth, super round CeramicSpeed balls rotating in hardened steel