MRP 1x SL Chainguide - 30-36t, Trek BB992 Clamp-On Mount, Aluminum Backplate, Model and MY Specific

Works ONLY with MY21+ Trek Procaliber and Supercaliber, MY20-21 Trek Top Fuel Clamps around BB92 bottom bracket shell Aluminum backplate is strong and lightweight Works with 30-36t round rings (and 28-34t oval rings) Works with 52-55mm chainlines with spacer-free chainline adjustment so adjustments can be made quickly