This is a difficult topic - the 6+ weighs about the most of any ebike on the market - truly a beast. The weight is an issue - two bikes with minimum equipment will be around 160 lbs +/- (180 to be safe) I bought a KBO rack and it does fit the bike and will accommodate the weight, but the rack is barely functional and hard to load. The hooks have a decent flexibility due to their length and pivot. I clamp down behind the seat at the rear wheel. Be careful one my one hooks will not stay latched (in place) and requires a strap to hold it in place.....