A friend of mine is having a 21" wheel put on his Rd King and installing a chrome front end as well, the indy doing the work is telling him to onstall a lowering kit in the forks or it won't look right, I have a 21 on my bike and I know alot of others that do and we didn't put a lowering kit on ours and I think they look great, I know this is alot of reading but is the height on a SG's front end the same as a 07 Rd King?