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Old 02-18-2018, 04:08 PM   #20
CWtheMan
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Join Date: Feb 2010
Location: Taylors, SC
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Quote:
Originally Posted by MattE303 View Post
I contacted the Sailun rep that I got the tire inflation chart from a few months back, asked him about the rim width discrepancy (most of our wheels are 6", Sailun spec sheet indicates 6.5" for s637t tires). Here is his response:
"In regard to your question about wheel width, a 6.5” wheel is recommended, however; the 6.0” and 7.0” wheel width is allowable. There is no risk around the safety of the tire in your application.

There could be a minimal effect on the wear on the outside rib of the tire. The narrower wheel “pulls” the beads of the tire in slightly. This can cause the footprint of the tire to not sit completely flat on the road (shoulders slightly raised off the road). The result is possible irregular wear on the shoulder. This situation is compounded if the inflation pressure is higher than the recommended pressure. It sounds like you have a pretty good handle on your inflation if you are following the chart. Just keep an eye on the shoulder wear. If you see irregular wear start to develop, you may be able to lower the pressure slightly if you have 10 psi of safety built in. Don’t go below the recommended pressure though."
The normal procedure for rim widths is to establish an acceptable range. It might be 6" - 7.5''. Within the range the tire manufacturer will establish a measuring size. Their tire fitment specs will correspond with the size of the measuring rim. With a single size recommendation such a 6.5" there is no wiggle room. Saying something else is hearsay without a published standard.

When a rim is marked with a single width it's the vehicle manufacturer's responsibility to waver it's uses with any tire fitment that is not a standard fitment for such a rim. That's why the vehicle certification label has basic wheel sizes on it such as 16x6J or 16x6.5J and so forth.
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