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32c vs 700c tires

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Old 05-07-18, 10:27 PM
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Originally Posted by ThermionicScott

+1, I'd go for a good 32mm over a 25mm any day!
+7 non?
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Old 05-08-18, 04:17 AM
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Originally Posted by ThermionicScott
+1, I'd go for a good 32mm over a 25mm any day!
It all depends on the quality and characteristics of the tire. I can assure you that the 25mm Veloflex Master clinchers I use for centuries are more plush than the 32mm Conti SportContact clinchers I use for commuting. Same for the excellent 25mm Vittoria Corsa G+ espacially when combined with latex inner tubes.

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Old 05-08-18, 05:44 AM
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Originally Posted by Timo 2.0
It all depends on the quality and characteristics of the tire. I can assure you that the 25mm Veloflex Master clinchers I use for centuries are more plush than the 32mm Conti SportContact clinchers I use for commuting. Same for the excellent 25mm Vittoria Corsa G+ espacially when combined with latex inner tubes.
Good point. When discussing tire width, one must assume tires and tubes are of the same make and optimum tire pressure is used for each width.
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Old 05-08-18, 08:29 AM
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Originally Posted by Timo 2.0
It all depends on the quality and characteristics of the tire. I can assure you that the 25mm Veloflex Master clinchers I use for centuries are more plush than the 32mm Conti SportContact clinchers I use for commuting. Same for the excellent 25mm Vittoria Corsa G+ espacially when combined with latex inner tubes.
If you read my post again, you'll note I said "a good 32mm".
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Old 05-08-18, 08:30 AM
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Originally Posted by SCRcat6
Good point. When discussing tire width, one must assume tires and tubes are of the same make and optimum tire pressure is used for each width.
Baloney. Good tires and good tubes are good tires and good tubes. They don't have to be the same make in order to compare them.
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Old 05-08-18, 06:22 PM
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Originally Posted by Bah Humbug
Except when it's not.
on what occasion?
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Old 05-10-18, 06:13 AM
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Originally Posted by ThermionicScott
Baloney. Good tires and good tubes are good tires and good tubes. They don't have to be the same make in order to compare them.
You're right they don't have to be the same to compare them, if all your after is rubbish data.


Then of course, if you are only capable of judging a tire by saying it is either "good" or "bad", then tire width probably wouldn't make an appreciable difference to you anyway.
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Old 05-10-18, 06:30 AM
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Originally Posted by bleui
guys, 28 is the sweet spot
At my weight (180#), I agree.
I used to run 3 bikes with: 25mm, 28mm, and 32mm tires.
After a while, I just got fed up with the 25mm tires, so I switched that one to 28mm.
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Old 05-10-18, 07:11 AM
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Originally Posted by Rkman
I am upgrading my tires from 32mm to 25mm,what are the major differences I should expect when I upgrade?

Thanks in advanced
32 mm is a bout 1 1/4 in. wide. 25 mm is about 1 in. wide. That's not a lot of difference so I wouldn't expect a lot of difference.

At this point somebody usually cites some laboratory study that quantifies the comparative rolling resistance of various tires. What they are overlooking is that tire rolling resistance isn't a very major contributor to the total resistance that's holding your bike (or trike) back. If you could reduce your tire rolling resistance to zero you wouldn't gain much and the faster you go, the less significant the gain.
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Old 05-10-18, 08:35 AM
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Originally Posted by Retro Grouch
32 mm is a bout 1 1/4 in. wide. 25 mm is about 1 in. wide. That's not a lot of difference so I wouldn't expect a lot of difference.

At this point somebody usually cites some laboratory study that quantifies the comparative rolling resistance of various tires. What they are overlooking is that tire rolling resistance isn't a very major contributor to the total resistance that's holding your bike (or trike) back. If you could reduce your tire rolling resistance to zero you wouldn't gain much and the faster you go, the less significant the gain.
This is true. Not a lot of difference in rolling resistance.

But a lot of difference in comfort bump absorption.

IMO the important difference is the tire pressures you can run and get similar rolling resistances. You can run the 32 a lot lower, and get more comfortable ride without a rolling resistance penalty (if the tires are good ones). You do get a slight weight penalty (depending on the tire) and I guess at higher speeds some aero penalty.
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Old 05-10-18, 09:22 AM
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Originally Posted by SCRcat6
You're right they don't have to be the same to compare them, if all your after is rubbish data.

Then of course, if you are only capable of judging a tire by saying it is either "good" or "bad", then tire width probably wouldn't make an appreciable difference to you anyway.
Based on my experience with 25mm CSTs, I have a pretty good hunch that a 32mm Compass will roll better. Perhaps you think that I need to suffer through 700x32 CSTs in order to not have "rubbish data", but I'm not exactly losing sleep over it.
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Old 05-10-18, 09:32 AM
  #37  
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Trying to cut through the argumentative BS, it depends on which 32mm tires you're changing out. If you've a hybrid, they're probably hybrid tires and slow. My wife went from the 1.5" slicks which came on her bike to a set of 25mm Contis. She couldn't believe the difference it made. Zooom. Put on a pair of Continental 4000 !!s tires, pump them up to 90-100 or whatever suits your weight, and enjoy. Don't agonize over it, just do it.
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Old 05-10-18, 10:19 PM
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Used to be 23s for road bikes but for the last few years many new bikes came most 25s installed as the new standard and currently... many believe, 28s are the new 25s
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Old 05-12-18, 06:18 AM
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Originally Posted by bleui
on what occasion?
Let's see...
  • a frame like mine where it won't fit
  • on a velodrome
  • very light riders
  • smooth tarmac
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