Are you looking for the RK? I don't think it will fit in a 8' trailer.
If it's not for the RK, forget I said anything
And Steve07 is a great resource.
Yes it's for the RK....With the V-nose,,the trailer should be close to 9.5' to 10' according to some specs I've read.
why a 5X8 i have a 6x12 set up with a little storage up front then welded up a wheel chock bike mount to center the load in the trailer for some nose weight and have some room behind the bike (09 classic) or can put two smaller bikes in if needed even used it as a camper one year at a rally but when you get a big bike in it's none too big inside PS you can always use it a a storage shed when not hauling the bike