Tough enough for Enduro, Downhill, and also weight conscious for XC riding, Praxis MTN Wave rings are machined from 7075 T6 aluminium and hard anodized to take a beating. Licensed and developed in conjunction with Mountain Racing Products, the Wave pattern tooth profile applies alternating lateral force to each chain link to actively retain the chain to the ring going beyond narrow/wide implementations that rely solely on friction, while allowing room for mud, debris, and grit to escape. The Wave design also wears more slowly than competing designs by spreading the load over larger surface areas.Key Features: For Praxis Direct Mount MTB cranks or 3-Bolt SRAM MTB cranks Stamped and machined manufacturing with hard black anodizing for durability Wave Tech alternating tooth profile for better chain retentionSpecification: For Praxis Direct Mount MTB cranks or 3-Bolt SRAM MTB cranks 28, 30, 32, 34, 36T | 7075-T6 See guide for DMA/DMB chain lines! Wave Tech alternating tooth profile for better chain retention 10/11sp Shimano/SRAM | 12sp SRAM Compatible Stamped and machined manufacturing with hard black anodizing for durability REAR DER- Must use a CLUTCH type rear derailleur. Example Shimano Shadow or SRAM Type 2 In very rough terrain, or just for pure security, we still recommend use of an upper guidePlease Note: Image is for display purposes only.