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.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 retentionSpecifications:• 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 guide.