The Air Lift AirLift 1000 Air Helper Springs # AL60744 have an outside diameter of 5.38" and a length of 7.5" when un-inflated and ready for installation. They are designed for coil springs with an inner diameter of around 5.5".
I'm not able to track down the inner diameter of the factory coils on your 2001 BMW e39 to confirm a fit, but if you are able to take this measurement (along with its internal height at normal ride height) I will be happy to determine the right air spring kit... view full answer...
The Kenda Karrier ST145/R12 Radial Tire, # AM10130, is approximately 1/2 inch larger in diameter and 1 inch wider than a 4.80-12 trailer tire. The main things to consider when moving to a larger tire size is wheel well clearance and weight capacity. The weight capacity should not be an issue since this is a load range D tire with a maximum load rating of 1,220 lbs at 65 psi.
The wheel well clearance is what you will want to look at. This tire will sit approximately 1/4 inch closer to... view full answer...
With an evenly distributed load, the Thule Roof Mounted Storage Lift, # TH572, has a maximum weight capacity of 100kg or approximately 220 lbs. view full answer...
The distance between the Inno roof rack crossbars on center is 660 mm/26 inches which is pretty close to what you need so the part numbers # INXB130-2, # INXS250, and # INK403 could maybe work, but it depends on how exact you need it to be to 27.5 inches. view full answer...
When folded, the distance from the center of the hitch pin hole to the closest part of the carrier is edge is 7-1/2 inches for the 20x48 Reese Cargo Carrier # 6502. view full answer...
The Curt Trailer Hitch, # 11498, for the 2006 BMW 5 series sedan is rated at 2,000 pounds gross trailer weight and 200 pounds tongue weight. The combined weight of the trailer and Harley cannot exceed 2,000 pounds. A lot of larger Harleys can be quite heavy on their own, with several models over 1,000 pounds.
However, if you find the right trailer and stay under the weight capacity limits of the hitch, you will be able to tow the bike and trailer and the hitch will be able to handle it.... view full answer...
On Curt hitches like the part # C11381 that have a 200 lb tongue weight capacity we can guarantee that you are totally safe if the tongue weight is up to 200 lbs. Anything beyond that we can't safely recommend. I would assume the rating is at least a little conservative but that doesn't mean we can endorse anything over that number. view full answer...