Was just looking around the HD website, when I did not enter my bike a whole slew of wheels came up. A few look pretty promising. I will have to check with the local parts to check the sizes. Didn't see any 21's just some 19's. May stick with 18's front and back. Prices are pretty good. Should have a 20% off sale soon to which makes it even better.

 

The MoCo only lists alternative wheels of the same sizes it uses on production bikes IIRC, they don't include custom sizes. As they use 19" front wheels on some Touring models we can buy that size to retrofit to other models of the same range.