The TNT Derringer Hub Set at J&R Bicycles is a high-quality low flange classic that was first introduced back in the 80s and has stood the test of time. Match with a high-quality freewheel and you have a budget-friendly alternative to cassette hubs. Along with a trusted reputation, the Derringer offers premium features like precision-sealed bearings, chromoly axle, 7075 bearing collars and axle nuts and flip-flop freewheel capability. Front Hub Details: 1. Flange Size = 38.00mm, (measured from center to center of spoke hole) 2. Flange Distance = 67.00mm, (measured from center of flange to center of flange) 3. Center of Hub to Center of Flange = 33.50mm 4. Axle Length = 150mm (Chromoly Axle) (3/8″ x 26tpi) 5. Hub Spacing = 100mm (to fit between dropouts) 6. Bearings = 2 Sealed Rear Hub Details: 1. Flange Size = 45.00mm, (measured from center to center of spoke hole) 2. Flange Distance = 54.00mm, (measured from center of flange to center of flange) 3. Center of Hub to Canter of Flange = 27.00mm 4. Axle Length = 160mm (Chromoly Axle) (3/8″ x 26tpi) 5. Hub Spacing = 110mm (to fit between dropouts) 6. Bearings = 2 Sealed