The Absolute Black CX 1X Oval SRAM GXP and BB30 DM Chainring is designed for SRAM cranks, such as the Force and Rival where the spider can be replaced with a Direct Mount chainring. This chainring fits both GXP® and BB30 spindle cranks. A narrow-wide chainring, the perfect choice for Cyclocross and Gravel using SRAM cranks. Eagle 12 speed compatible. Absolute Black CX 1X Oval SRAM GXP and BB30 DM Chainring Features/Advantages Finest design to provide excellent weight to strength ratio One of a kind special oval shape (Patent Pending) Unique Patent Pending narrow-wide teeth profiles to keep your chain in place for minimum 12 months! Special 3D teeth machining for ultimate mud relief decrease wear and noise dramatically Designed to handle mud and grass with ease Superb quality and great look. Reduces stress on knees and helps to maintain your legs fresher for longer. You will not feel the oval shape at all. Absolute Black CX 1X Oval SRAM GXP and BB30 DM Chainring Weights 36T (89g) 38T (94g) 40T (104g) 42T (111g) 44T (112g) 46T (123g) 48T (125g) Absolute Black CX 1X Oval SRAM GXP and BB30 DM Chainring Specifications Compatibility: SRAM Force 22, Force 1, CX1, Rival 22, Rival 1, S900. GXP and BB30 models. Also fits SRAM XX1, X01, X0, X9, X7, S2210, S1400 GXP and Long spindle BB30 models (15mm spacer on drive side) Eagle 12 speed compatible. Material: CNC machined 7075 Txxx Aluminum. Long-lasting construction. Mounting: Direct Mount Ovality: Optimized to each size separately. Range: 10.2-12.1% and Timing of 110.5-112.3° after TDC (top dead center) Patent Pending.