The Gen-Y Hitch Aluminum Loading Ramp Set - 144" Long x 15" Wide - 8,000 lbs, part # GH54FR, is the best option we have for you to load your smart car on a trailer that is 48" high. Unfortunately, we do not offer a version of this ramp that folds.
The longest folding aluminum ramp we offer is the Arched Loading Ramp Set - Center Fold - Aluminum - 90" x 18" - 3K, part # 288-07432-2. This set of ramps has a weight limit of 3,000 lbs. These ramps would have to be at a very steep angle to... view full answer...
The bearing difference doesn't mean too much since the spindles are the same so regardless of which axle you decide to put the brake kit on you'll need a 6k rated disc brake kit with an 6 lug bolt pattern. So for that we have the Kodiak brake kit part # K2HR526D which is a fit for your spindles.
This kit does require the bearings part number # 25580 and # 15123 and seal part # RG06-070 which are sold separately.
Or if instead you were wanting a kit that uses an idler hub and a slip-on... view full answer...