Just a question i had asked this before and didn't get a response... well i ended up converting over to a 21 on a 2005 springer classic it was just a spare wheel a friend had for sale everything bolted up without any issues doesn't even seem to be offcenter only thing is it's a 21x2.15 i know they say to use the 21x3.5 haven't purchased this wheel from my buddy yet told him i wanted to make sure it fit so just gettin some opinions from everyone am i gonna run into any issues with this? i'll attach a pic
Axle size might be different, also if you get a stock wheel HD wheel its gonna be about 1/4 off centered unless you have the hub moved over 1/4 inch and re true the wheel.
The only bikes that have had issues with the 21" in front are a few baggers. For that reason anyone with a bagger is always advised to raise up the rear of the front fender but we have never experienced this issue with a softail.