When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Dyna Glide ModelsSuper Glide, Super Glide Sport, Super Glide Custom, Dyna Glide Convertible, Super Glide T-Sport, Dyna Glide Police, Dyna Switchback, Low Rider, Street Bob, Fat Bob and Wide Glide.
One thing you'll be giving up is the size of the tire contact patch on the front. American Iron this month (March) has a question on the same type of swap on an '03 Deuce if you're interested. Not exactly the same question you have but their answer may be of some help. Turns out that the 21" low-profile tire has the same height as a 19" and the 19" has a wider contact patch. Same concept as swapping out the stock 16" wheen for an 18" with a low-profile tire, nearly the same diameter, so no performance drawbacks.
As far as I can see you would have to buy not just a tire but you will need a wheel also and you will need to raise the fender I would suspect! But I'm not 100% sure if you would need to do anything else.
If you look at the actual diameter of the packages, you'll find the stock 21" tire/wheel package is only about 1/2" taller than the 19". There's probably enough room under the stock fender for that. Might even look better with the fender closer to the tire. It is a lot thinner, though. So it might give the impression of a wider front.
It is a slightly smaller contact patch. But there are thousands of bikes out there running that skinny tire without any problems. I put 40,000 miles on mine without any problems.
I am going to sell the wheels and tires both when I change.. they are brand new I only have 61 miles on my bike... lLet me know if you are interested......
Hey, I was looking into doing the same swap, going from my stock 19 to a thin 21. Only problem we ran into was finding a rim that had a 21" diameter on the new 1" axle.
Please post whatever you find out. Thanks.......
Slideshow: From the troubled AMF years to modern misfires, these bikes earned reputations for reliability issues, questionable engineering, or disappointing performance.
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Slideshow: The Swiss custom shop has taken a Harley Softail and stretched it into something so long and low that it looks closer to a rolling sculpture than a conventional motorcycle.
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Slideshow: A standard cruiser becomes an intricate metal canvas in the hands of a Swiss custom house known for pushing Harley-Davidson platforms far beyond their factory brief.
Slideshow: Harley-Davidson's challenges aren't abstract; they show up in dropping shipments, shrinking dealer traffic, and strategic decisions that aren't yet translating into growth.