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Velocity Aerohead (Road) Replacement Rim?

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Velocity Aerohead (Road) Replacement Rim?

Old 07-23-21, 09:11 PM
Bill Kapaun
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Originally Posted by Steve_sr View Post
......I have also been reading that RR on a drum is not a good real world test since none of us ride on a steel drum or really smooth asphalt either. Silca makes a good point in their almost impossible to find blog posts........


I can't believe all the lemmings that think a test on a 20" diameter drum is going to have a contact patch resembling that of a flat surface.
The drum is obviously going to favor the more supple sidewall.
I expect a supple sidewall to be "better", but not to the degree the test leads some to believe.

A better test would to be roll the bike down a ramp with a chronograph located at a point where the bike is just off the ramp on the level surface and another at a measured distance away.
Make "n" passes for an average.
Compare the % lost between the 2 points.

Last edited by Bill Kapaun; 07-23-21 at 09:15 PM.
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Old 07-24-21, 09:53 AM
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Originally Posted by Steve_sr View Post
You are technically correct in that the hub, spokes, rim are stiff enough not to affect compliance (suspension). However, the road-tire-rim interface DOES affect compliance and ride quality. Changing from a 20 to a 23mm rim width significantly affects the profile (shape) of the tire cross section hence its compliance and contribution to ride quality. The same thing happens in your car with low-profile tires.
No, a 3mm change in rim width doesn’t have much of an effect on the tire cross section. People seem to get hung up on the whole number nature of the metric system. 3 mm is the width of a nickel. It will change the tire profile a little but, honestly, a “huge difference” is more perception than real.
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Old 07-24-21, 06:34 PM
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Well, I actually switched to the old, narrower rimed spare wheels and went for a 68 mile ride today.We had some good asphalt and some really terrible chip & seal. Running the same pressures that I had recently been running on the A23s I noticed a definite improvement in ride quality but it is not nearly as much as what I remember after originally switching to the A23s. I suspect that this is because I was still running too much pressure in the A23s at the time. Looks like I need to find some better tires with more supple casings.
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