Tire not wheel
Road Captain
Joined: Nov 2014
Posts: 680
Likes: 224
From: Buhl, Idaho
width, or diameter? Why would you need a wider front tire? The diameter is another story, some go all the way to 30 inch diameter , but you can't do that without other modifications, as I'm sure you already know.
Club Member
Joined: Jun 2007
Posts: 45,429
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From: Bedford UK
Choice of non-stock tyres is governed by what industry makes for us, available clearance on your bike, plus the diameter and width of your rims. If your RG is an Ultra your front wheel is 17" x 3" wide rim, if you have a Custom your wheel is 18" x 3.5". Which do you have? When asking questions like this please give us full details, which you can do by adding them to your signature.
Seasoned HDF Member
Joined: Mar 2012
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From: Centennial, CO
HDF Community Team
Joined: Nov 2012
Posts: 6,191
Likes: 2,423
From: USA
Presuming you want to fit this tire under the stock front fender, you might want to consider road debris and such.
As the tire gets closer to the rim, the more easily damaged the rim becomes, from a rock or such lodged between the tire and the rim. If you're lucky, it just dents or creases the rim. Sometimes though, it locks the front wheel. I've watched riders go down from locking a front tire this way.
So think carefully about your riding and getting the front tire close to the rim.
Still want to go as large as possible? OK. Measure it. Easiest way is some playdo or clay on the tire and roll the tire under the fender, all the way. Use a ribbon of playdo or clay all the way across the tire, and pack it into the tire so it sticks well. Roll the wheel under the fender and now measure cut down height of the playdo or clay. That's the room you have. Use an online calculator for tires and figure out how far up you can go on size. It's not going to be a lot. Probably on the order of a 140/70, maybe a 150/70.
As the tire gets closer to the rim, the more easily damaged the rim becomes, from a rock or such lodged between the tire and the rim. If you're lucky, it just dents or creases the rim. Sometimes though, it locks the front wheel. I've watched riders go down from locking a front tire this way.
So think carefully about your riding and getting the front tire close to the rim.
Still want to go as large as possible? OK. Measure it. Easiest way is some playdo or clay on the tire and roll the tire under the fender, all the way. Use a ribbon of playdo or clay all the way across the tire, and pack it into the tire so it sticks well. Roll the wheel under the fender and now measure cut down height of the playdo or clay. That's the room you have. Use an online calculator for tires and figure out how far up you can go on size. It's not going to be a lot. Probably on the order of a 140/70, maybe a 150/70.
Club Member
Joined: Jun 2007
Posts: 45,429
Likes: 2,898
From: Bedford UK
- 130/90 x 16,
- 130/80 x 17,
- 130/70 x 18,
- 130/60 x 19.
Last edited by grbrown; Sep 28, 2018 at 08:09 AM.
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