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Forum: Road Cycling

01-04-12, 08:02 AM

Replies: 78

The science behind wide rims?

Views: 7,414

Posted By frenchyge

Not sure if you looked at FLO's data, but...

Not sure if you looked at FLO's data, but contrary to the artistic renditions of the tire shapes and contact patches between the 23mm and 19mm rims, the actual differences were only 2-3% difference...

Forum: Road Cycling

01-03-12, 12:18 PM

Replies: 78

The science behind wide rims?

Views: 7,414

Posted By frenchyge

So, it's tire material and construction which...

So, it's tire material and construction which produce differences in rolling resistances on irregular surfaces? Then if we're simply talking about differences in rim width, rather than differences...

Forum: Road Cycling

01-03-12, 11:58 AM

Replies: 78

The science behind wide rims?

Views: 7,414

Posted By frenchyge

Last night I measured a 23C Specialized tire at...

Last night I measured a 23C Specialized tire at 120psi on both a 19mm Neuvation rim and a 23mm Velocity rim. On the wider rim, the tire profile was 2mm wider and .2mm shorter. The tire sidewall...

Forum: Road Cycling

01-02-12, 10:21 AM

Replies: 78

The science behind wide rims?

Views: 7,414

Posted By frenchyge

The 27% increase in rim width only shortened the...

The 27% increase in rim width only shortened the contact patch by 2.9% (@120psi), so the theoretical reduction in rolling resistance is half of that (1.45%). I think *that's* roughly the size of the...

Forum: Road Cycling

11-14-11, 10:30 PM

Replies: 78

The science behind wide rims?

Views: 7,414

Posted By frenchyge

I applaud your taking the time to actually...

I applaud your taking the time to actually measure the difference in contact patch, and having the guts to post the results. It's unfortunate that a 27% increase in rim width only shortens the...

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