U or Rim Brakes Only Shimano or Sram 8 or 9 or 10 Speed Only Shimano 7 speed needs a spacer Fit Tire Size: 700c x 23c to 32c Weight: Front: 1000g Rear 1235g (including hubs spokes and skewers) Front Hub: KT-5P5F Size: M9x100x108 Spokes: 24 holes Ball Bearing Alloy Spokes: Stainless Steel Rear Hub: KT-GT8R Size: M10x130x140 Spoke Holes: 24 Ball Bearing Alloy Spokes: Stainless Steel