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Bit the bullet..Finally going from 23s to 25s.

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Road Cycling “It is by riding a bicycle that you learn the contours of a country best, since you have to sweat up the hills and coast down them. Thus you remember them as they actually are, while in a motor car only a high hill impresses you, and you have no such accurate remembrance of country you have driven through as you gain by riding a bicycle.” -- Ernest Hemingway

Bit the bullet..Finally going from 23s to 25s.

Old 08-14-17, 07:43 PM
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Wileyrat
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Bit the bullet..Finally going from 23s to 25s.

I decided after Sundays ride, it was time for a new back tire. Rather than just replace it with another Rubino Pro III, if I can find one, I decided it's time to join the modern world, and go with some 25mm tires.

So my Ridley Fenix, with Hed Ardennes wheels will be equipped with 25mm Conti gp4000's. I'm hoping it'll be a good move.

Last edited by Wileyrat; 08-14-17 at 07:52 PM.
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Old 08-14-17, 08:09 PM
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Your a day late and a dollar short. Now you need 28mm.
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Old 08-14-17, 08:20 PM
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Originally Posted by brianmcg123 View Post
Your a day late and a dollar short. Now you need 28mm.
I've got 35's on my Gravel Grinder.

But joking aside... I have 23, and (more so) 25mm too. I still think there is plenty of use for 23's.
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Old 08-14-17, 08:32 PM
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Originally Posted by Wileyrat View Post
... another Rubino Pro III, if I can find one
Vittoria Rubino Pro III SE Road Tire
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Old 08-14-17, 08:45 PM
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Originally Posted by brianmcg123 View Post
Your a day late and a dollar short. Now you need 28mm.
I went the other way around, from 35 to 28... Adjusted the pressure last night to 55 psi front and 80 psi back (according to total weight and 40/60 ratio) instead of 95 psi in both. No performance penalty (over the length of my commute) and smoother ride on coarse roads.
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Old 08-14-17, 09:02 PM
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HED Ardennes were made for 25 mm tires.

It will be a perfect match.
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Old 08-14-17, 09:36 PM
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Originally Posted by TimothyH View Post
HED Ardennes were made for 25 mm tires.

It will be a perfect match.
That's the biggest reason I did it.
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Old 08-14-17, 09:42 PM
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I usually stay in the middle of the pack on Strava segments. Recently I switched to 28mm tires - I've continued setting lots of personal records and I am slightly more comfortable than on 25mm

Could be that 28mm tires made me faster or could just be that I've been riding more
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Old 08-14-17, 10:09 PM
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Originally Posted by SylvainG View Post
I went the other way around, from 35 to 28... Adjusted the pressure last night to 55 psi front and 80 psi back (according to total weight and 40/60 ratio) instead of 95 psi in both. No performance penalty (over the length of my commute) and smoother ride on coarse roads.
Here in Portland, I find running big differences of pressure between front and rear tires leads almost inevitably to pinch flats and dented rims. We have traffic here that has led more than once or twice to me having to brake hard. We also have a lot of poorly paved streets. If I hit a pothole during that hard braking, I want nearly the pressure in front that I run in back since virtually all of my weight is on the front tire that just hit the pothole edge. So I keep it simple and keep the front inflated to 6-10 psi less than the rear, never more.

You may well have more aware and courteous drivers and better paved streets where this isn't an issue.

Ben
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Old 08-14-17, 10:37 PM
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Originally Posted by TimothyH View Post
HED Ardennes were made for 25 mm tires.

It will be a perfect match.
I still ride 23s on my HED Ardennes. I've been thinking about going to 25s, but somehow I never get around to it.

I've got 25s on my other bike with Velocity A23s, and that works pretty well, but that's a bike that I seldom ride for speed (it's my rain bike, etc.), so I'd have trouble telling anybody whether I think the 25s really do roll better.
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Old 08-15-17, 12:45 AM
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I have wide rims and the Conto GP4000IIS measure 27mm inflated to 100 psi. Ride is smooth as buttah.
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Old 08-15-17, 02:05 AM
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Went from 23s on narrow rims, to 25mm on wider rims, so they measure 27.5.

Also switched to tubeless, so lower pressures. Most comfortable ride that I have ever had on my bike.
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Old 08-15-17, 07:56 AM
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25 is a great combo of comfort and speed. i have 25's on 2 bikes that i ride the most - a hybrid and an emonda sl6. keep the tires pumped up and enjoy!
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Old 08-15-17, 08:22 AM
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Originally Posted by SylvainG View Post
I went the other way around, from 35 to 28... Adjusted the pressure last night to 55 psi front and 80 psi back (according to total weight and 40/60 ratio) instead of 95 psi in both. No performance penalty (over the length of my commute) and smoother ride on coarse roads.
Tell us how that works over time WRT pinch flats and rim damage. I hope the answer is, "Just fine."
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Old 08-15-17, 11:01 AM
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Originally Posted by brianmcg123 View Post
Your a day late and a dollar short. Now you need 28mm.
real 28's? GP 4000s 25mm are actually 28mm
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Old 08-15-17, 12:39 PM
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Originally Posted by floridamtb View Post
real 28's? GP 4000s 25mm are actually 28mm
Are they?

That's good to know.
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Old 08-15-17, 12:42 PM
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Same tire in two sizes: 23 and 25. Can you really feel much difference between one and the other?

The jump from 25 to 28 is big though, greater impact than 1 mm more difference would seem like.
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Old 08-15-17, 12:47 PM
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when my road bike 23s started to split I switched to 25s & was glad about it. before getting that bike I had always ridden on 28s with road bikes. I like the 25s now. other bikes of course have been equipped with various other types & sizes of tires
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Old 08-15-17, 12:51 PM
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Originally Posted by wphamilton View Post
Same tire in two sizes: 23 and 25. Can you really feel much difference between one and the other?
I noticed the difference between 23mm and 25mm Pro4 Endurance tires.
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Old 08-15-17, 12:56 PM
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23s, 25s, 28s, it's all the same to me. Nowadays I just put 23s on narrow wheels and 25s on wider wheels. I might take out the 28s during the winter just to wear them out.
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Old 08-15-17, 12:57 PM
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The main difference I noticed was that turn-in was slower when I used 28s.
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Old 08-15-17, 01:15 PM
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Originally Posted by autonomy View Post
I usually stay in the middle of the pack on Strava segments. Recently I switched to 28mm tires - I've continued setting lots of personal records and I am slightly more comfortable than on 25mm

Could be that 28mm tires made me faster or could just be that I've been riding more
Nice, but its all about the bike

(at least for my case )
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Old 08-15-17, 02:50 PM
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Originally Posted by brianmcg123 View Post
Are they?

That's good to know.
Yeah, I had the shop use digital calipers to measure about a week ago, sure enough 28mm as I had read elsewhere
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Old 08-15-17, 05:25 PM
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GP4000's in 25's measure 28. So if you were riding the same tire in 23 then you were already on 25's.
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Old 08-15-17, 06:18 PM
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I've always heard that Continentals run narrow, maybe just the Gatorskins that are abundant around here.
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