Loaded for a long gravel route with washboard underfoot and loose climbs ahead, the Switch Rack carries the weight without a single frame mount. This rear bike rack replaces the thru-axle with its own 7075-T6 aluminum axle, so a thru-axle bike with no rack mounts can haul a heavy load. It holds up to 66 pounds spread evenly. What Our Gearhead(R) Experts Are Saying:"Washboard gravel did not loosen anything on this rack, even with a week of gear strapped on. The load sat steady over the rear wheel through every loose climb."