CeramicSpeed Trek BB90 Bottom Bracket - SRAM GXP and Trek, Black Coated Bearing Bike Accessories_Bells Use as a seat bag

Use as a seat bag or with dual bottle XLAB carriers

KMC X10 w/ MissingLink

The Ergo is compatible with all current aerobars and earlier models that used the F-19

The polymer has new formula enhanced for more durability and comfort

Chlorine resistant

CeramicSpeed Trek BB90 Bottom Bracket - SRAM GXP and Trek, Black Coated Bearing Bike Accessories_Bells Use as a seat bagTrek 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 features super smooth, super round CeramicSpeed balls rotating in hardened steel