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General Category >> Rubber Side Down! >> 140/70-15 on stock rear rim
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Message started by kojones on 03/30/18 at 15:41:27

Title: 140/70-15 on stock rear rim
Post by kojones on 03/30/18 at 15:41:27

Will it fit?

Title: Re: 140/70-15 on stock rear rim
Post by Dave on 03/31/18 at 04:17:10

No - you might be able to lever it on - but it will be very distorted and the tread cross section will be very round....there will be tread rolled over onto the sidewall and very little tread touching the pavement.

You can see in the chart that a 140/70 tire is not recommended for a 2.75" wide rim. As the tire profile number becomes smaller (90 -80-70) the height of the sidewall gets shorter, and the rim width must be closer to the width of the tire.

http://i61.tinypic.com/291nvvt.jpg

Title: Re: 140/70-15 on stock rear rim
Post by kojones on 03/31/18 at 08:49:50

OK, thanks. Seems like something that I don't want to do. Local shop has one tire on sale, and I do have two spare wheels..

Title: Re: 140/70-15 on stock rear rim
Post by jcstokes on 03/31/18 at 17:43:35

Would a 140/80 be safe. I'm running 140/90 but the middle wears out before the sides. Some on here seem to think the 140/80 promotes better handling.

Title: Re: 140/70-15 on stock rear rim
Post by JLC on 03/31/18 at 19:10:39

140/80-15 tire is original equipment on rear wheel (rim size 2.75-15).

Title: Re: 140/70-15 on stock rear rim
Post by Dave on 04/01/18 at 04:25:01

7E7767607B7F7167140 wrote:

Would a 140/80 be safe. I'm running 140/90 but the middle wears out before the sides. Some on here seem to think the 140/80 promotes better handling.

Unfortunately - the only tire I know that comes in the 140/80 size is the original IRC, and it is not a very good tire.

A 130/90 - 15 tire is within millimeters of diameter and width of the 140/80 tire, and it offers a much better choice of tires.

And most riders wear out the center of the tread long before the sides - you spend very little time in corners compared to the miles of straight sections that link the curves.......and your hard acceleration is most often done in straight lines. Some sport touring and sport bike tires come with a harder rubber compound in the center of the tread to help get more mileage out of the tires.