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.