Very strong yet lightweight pannier racks for the R1200GS/ADV. They are made from 2mm thick 18mm diameter STAINLESS steel tubing. Optimal load distribution to the whole motorcycle rear sub frame for best stability and strength - especially important in off-road use! Exhaust clearance suggests usage of 35L on exhaust side and 41L on other side. ( 35L+41L = width 39 inches). Also new ZegaPro panniers 38L & 45L can be used!