The Tomahawk is Rocky Mounts do it all upright mount. It fits all crossbars, carries road, mountain, hybrid & fat bikes like a champ. A little more friendly on the wallet than the BrassKnuckles, but with most of the same rock solid fit to your crossbars & a great secure fit to your bike.Fits bikes with a 20-29 wheel base, and tires up to 5.0
