Bombshell MICRO SQ TAPER Bottom BracketBOMBSHELL MICRO SQ TAPER BB Made for the smallest riders to keep the weight down. Feather light AL 7075 T10 spindle BB with sealed enduro bearings and aluminum sleeve. 4. 2 oz ( 117 g) Replace with our Ti BARE BB once you get stronger, faster, heavier or fly high. Max rider weight limit 47 lb 22 kg. Sizes 105 108 111 mm EURO 68 MM BB shell compatible Bombshell MICRO SQ TAPER BB together with our ROCKET SQ SLR cranks and new MICRO PUMP PEDALS create