The dmr spin chain ring is now part of the new dmr colour component range they are cnc machined forged or a combination of both for the best possible combination of strength weight price and surface finish the surface finish is the critical element allowing the anodizing to really shine out dmrcolour components are designed to match our alloy wingbars nutz swarm stems tilt seat posts grab seat clamps and hubs spin chain rings have a 1516th internal bore for the crank axle and are su