The one and only AbsoluteBLACK Premium Sram compatible Direct mount BOOST 1X Oval narrow-wide chainrings are designed for GXP, DUB, and Long BB30 cranks. These chainrings are dedicated for Boost bikes (3mm offset). With their special PVD Rainbow Titanium coating process, these chainrings are not only durable but also incredibly beautiful. Please note that due to the nature of the PVD process, every chainring is unique, and the color may vary. No two chainrings are the same, making your new ring completely individual.Size (Weight):- 28T (50g)- 30T (55g)- 32T (59g)- 34T (66g)- 36T (74g)Compatibility:- SRAM XX1, XX1 Eagle, X01, X01 Eagle, GX Eagle, X1, X0, X9, X7, S2210, S1400, and Truvativ AKA cranks- GXP and Long spindle BB30- BOOST148 bikes ONLY- 9, 10, 11, and 12spd Eagle compatibleMaterials: CNC machined 7075 Txxx Aluminum. Long-lasting constructionChainline: 52mm BOOST148 specific chainline. 3mm offsetMounting: Direct MountOvality: Optimized to each size separately. Range: 10.2-14.4% and Timing of 110.5-116.3° after TDC (top dead center) Patent PendingAdvantages of our special Oval chainrings:- 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 a minimum of 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- You will ride faster using ovals. If you keep using a round ring, others will get quicker- Reduces stress on knees and helps to maintain your legs fresher for longer- You will not "feel" the oval shape at all.