Novatec Road Bike Front and Rear Hubs 20 Front/24 Rear Front Hub(A171SB): Classical Hub Design Smooth Outlooking standard Spoke Holes Skewer is Included Shimano 8 or 9 or 10 speed Weight: 114g (hub only) Spoke Holes: 20 Gauge: 14 P.C.D: 38 mm Flange To Flange: 72 mm Sealed Bearings: 2 O.L.D.: 100mm Axle AL: 9 x 108 mm Rear Hub (F172SB): Classical Hub Design Smooth Outlooking Cassette Body with 2 Sealed Bearings Standard Spoke Holes Skewer is Included Shimano 8 or 9 or 10 speed