HOME/Bottom Brackets/Ceramic Bearing Bottom Brackets Shimano HT2 24mm Spindle and SRAM GXP Compatible Ceramic Bearing Bottom Brackets Shimano HT2 24mm Spindle and SRAM GXP Compatible "Of all the ceramic bearing BB's I've used, this has performed the best." - WMB MagazineOur award winning range of Shimano HT2 24mm spindle and SRAM GXP compatible Uberbike ceramic bottom brackets are available in 8 anodised finishes so you can perfectly pair with your bike.