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21" front wheel- 120 or 130 tire?

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33K views 18 replies 13 participants last post by  tonypunc1  
#1 ·
I am trying to decide between Performance Machine Luxe front wheel or the Rotation Titan wheel for 2016 RGS. What tire size is generally recommended for the slightly larger wheel- 120 or 130? Thank you in advance for any help-
 
#9 ·
Guys....not saying there isn’t a 130 to be used, that people don’t use them, that it looks funny or doesn’t work. I would argue that there are better tire choices but they’re just that, a choice. Harleys come with 130 Dunlop bias plys. That is not the common size for a custom 21” wheel.

Live2ride, No apology necessary friend. I wasn’t upset. I like to argue. ? That’s a good looking wheel by the way. I would argue that Dunlop and Sportchrome have a deal to push the 130 for some reason. Matching bias ply to bias ply maybe. I can’t for the life of me figure why they would need a different bearing for a 120 width vs a 130 width. The need for a different bearing rises from the change in wheel diameter sending the wrong info about the vehicle’s actual speed. 21” rotates less in a given distance so the information from the VSS (vehicle speed sensor on the trans) isn’t jiving with what the abs bearing is saying. Width doesn’t play a part in this information game. Or if it does I’m just not seeing the correlation. A 120/70-21, should, rotate the same number of times in a given distance as the 130/60-B21. Or be close enough that it’s negligible. There’s absolutely nothing wrong with the 130/60-b21. It might even give a slightly softer ride being bias ply. The load rating is negligible and most people don’t, or can’t, ride their Harley baggers over 130mph so the speed rating isn’t going to matter.
Just like choosing a tire manufacture...Use whatever you feel better about Scottrgs. In fact I wouldn’t listen to me anyway. Pm Coastal moto or hogpro and see what they recommend.
 
#15 ·
I've run a 3.5 x 21 wheel since day one (10 years) and I chose the 120 tire simply because you have numerous companies that make a 120 x 21 so you always have options/choices. I think Dunlop might be the only company doing the 130 x 21 at this time.
 
#16 ·
For anyone else doing this, the 130-60-21 tire size is pretty new. Up until a few years ago all there was was the 120-70-21. Upgrading to a 21" (whether it be 21x3.25 or 21x3.5) either tire will work. On Rushmore models brackets are needed to raise the stock fender and either tire will fit fine with said brackets. You also need the special 21" abs bearing for the 21" wheel so that the ABS does not get thrown off. Not sure if there have been new products introduced for this, however last I heard the Ness ABS bearing is what was being used and it was wheel size specific.

I see this post is several years old, but information is a good thing.
 
#18 ·
I am having a 21 installed Thursday with the Dunlop American Elite 130/60. I assumed that was the only tire option really. Wasn’t aware of the 120. Costal Moto already has bearings installed so assume they will be the correct ABS bearing for the 21 inch wheel.


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