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Old August 28th 19, 05:22 AM posted to rec.bicycles.tech
Frank Krygowski[_2_]
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Default Rolling Resistence

On Tuesday, August 27, 2019 at 5:51:20 PM UTC-4, Tom Kunich wrote:
Because of several things, I ended up mounting the Vittoria Roubino Pro G+ tires on the LeMond.

Sunday I did an easy 40 mile ride and I was exhausted at the end. These tires did ride well - they smoothed out the roads quite a bit th9ugh they appeared to have a lot of rolling resistance. I couldn't figure out if it was my imagination and finally came to the conclusion that I am simply on the low side of my fitness cycle. The difference in rolling resistance is so small compared to the wind resistance that I can't see how you could possibly tell.

I did a hard 40 miler today with a lot of climbing. I used the Colnago which has the Vittoria tubeless racing tires on box tubeless times. Now the Colnago is an aero bike but since this ride is mostly all climbing or very twisty downhills the aero hardly seems significant.

But I did 3400 feet of climbing and the tires seemed to make a rather extraordinary difference. I DID NOT get good sleep last night so it isn't as if I recovered.

I think that it would probably be a good project to make a rather off-hand experiment on types of tires and how they seem to run and ride.

Both of the Vittoria racing tires - the Corsa G+ And Corsa G2 tubeless feel very good. Better than the Michelin Pro4 Endurance which is pretty good. All of these tires have good puncture resistance which is necessary around here. I think that I'll pull the Roubino Pro's off and replace them with a new set of Gatorskins I have laying around. It's been so long since I've ridden Gatorskins that I can't remember their rolling resistance.

On another set of wheels I did a couple of metrics on a set of Continental GP5000TLR tubeless tires. I wouldn't exactly call these things low rolling resistance. They have a tacky compound that screws up any directional stability the tires may have. While the bike goes exactly where you point it with the Vittoria Corsa G+ you have to watch the GP5000's closely. But in a corner the Continental is probably better. Riding these metrics I was often confronted with a decreasing radius turns. On the Vittoria's I would slow a little and complete the turn. With the Continentals I would just ride through it.

My experience with the Continental tires is that you have to wear them through to the thread before throwing them out. The Vittorias are different. It didn't appear to have much wear on the tread facing but the rubber sidewalls were peeling away and that made me nervous so I threw them away.

I guess I'll have to experiment to see if the non-aero LeMond is what the problem is or the rolling resistance of the tires.


Seems to me if you want to get a handle on the rolling resistance of your
various tires, you might find a hill with a long, gentle slope and keep track
of speed results when coasting down it.

I've done just a little of that. One thing it taught me was that it's harder
than it seems to gauge rolling resistance just by "feel."

- Frank Krygowski
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