SRAM Force E1 Direct Mount Chain Ring Set Light, Stiff, and Durable If you want to go fast on your road bike, you'll want a lightweight and stiff chain ring. The SRAM Force E1 Direct Mount Chain Ring Set is a light, elegant one-piece construction, so none of your effort goes to waste. A 13-tooth delta on all chainring pairs ensures precise shifting for any setup, as well as a less dramatic change in cadence during front shifts. X-Range gearing technology gives you more range and a smoother gear progression, so you're always in the right gear. Features One-piece construction for faster, smoother, and more secure shifting Available in 46/33T, 48/35T, and 50/37T chainring combos X-Range gearing technology gives you more range and a smoother gear progression, so you're always in the right gear SPECIFICATIONSDrive Train Speed12-Speed Tooth Count46/33T, 48/35T, and 50/37TMaterial Aluminum Direct Mount Type8-Bolt SRAMChainline-Offset-Intended Use Road Weight TBDChainline/Chainring Offset Guidelines Rear Spacing135mm / 142mm148mm Boost Super Boost 150mm / 157mm Fat Bike (170mm, 190mm, 200mm)Chainline48 - 50mm51 - 53mm54 - 56mm56mm+Chainring Offset~6mm~3mm~0mm~+2mm | Sram | Force E1 Direct Mount Chain Ring Set 46/33T | Aluminum