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Tires: 25 vs 23

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Tires: 25 vs 23

Old 11-13-10, 08:41 PM
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pgjackson
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Tires: 25 vs 23

My bike currently has stock 700X25 tires with tread pattern. I am planning to get new wheels and am considering going with a slick tire in 700X23 size. Will the thinner tire make a noticable difference to a noob like myself on an entry level bike?
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Old 11-13-10, 08:51 PM
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No, It won't make much difference. The tread patterns are typically so minimal on road bikes as to be virtually slicks anyway. Personally, I prefer a wider tire, but 2 mm is small potatoes.
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Old 11-13-10, 09:15 PM
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I like 25 in back for a little more comfort. 23 up front
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Old 11-13-10, 09:54 PM
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Keep the same tires and just upgrade the wheels.
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Old 11-13-10, 10:03 PM
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Originally Posted by pgjackson View Post
My bike currently has stock 700X25 tires with tread pattern. I am planning to get new wheels and am considering going with a slick tire in 700X23 size. Will the thinner tire make a noticable difference to a noob like myself on an entry level bike?
First off HOORAH! And happy 235th Devil Dog!
I used to live out in Oceanside (and did USMC JROTC).
That out of the way...

I just went from cheap 23's to great 23's.
Was going to go with 25's, but the great 23's gave me what I wanted.
I'd say if you do upgrade, get the best 25's you can afford.

BF Approved: Continental Grand Prix 4000S tires will make a HUGE difference.



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Old 11-13-10, 10:22 PM
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Originally Posted by z90 View Post
...Personally, I prefer a wider tire, but 2 mm is small potatoes.
Depending on your weight, I'd try a bigger tire, too. I weight 240, so your experience may differ, but I don't even think about anything skinner than 32 anymore, and most of my riding is on 35s.
For the record, I'm no slower on my 12-mile commute on 32s than I was on 23s, and the bike feels a LOT better. i suspect most if not all the difference is in the pressure, though. I have to run 23s at 105-110 or I pinch flat. The 35s feel fine at about 80psi.
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Old 11-13-10, 10:28 PM
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the one advantage of narrow tires is in the corners, where there's less sidewall so there's less material that can flex unwantedly.
wider tires will do that, but it's mainly the rim width that causes the unwanted flexing.

Not that you'd notice this with a 25mm to 23mm transition.
It's a bit more noticeable when you use narrow rims with wide tires in the range of 32mm or higher.
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Old 11-13-10, 10:41 PM
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The biggest difference will be in the ride quality. 25c are much, much smoother riding than 23c. The rolling resistance difference is negligible, if any.

The downside to 25c? Having to re-adjust your brakes to get wheels off and after you put them back on.
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Old 11-14-10, 01:06 AM
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Interesting bit on tire width: https://www.cptips.com/tires.htm
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Old 11-14-10, 07:22 AM
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Originally Posted by rushbikes View Post
Interesting bit on tire width: https://www.cptips.com/tires.htm

Thanks for that Rush.

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Old 11-14-10, 08:17 AM
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I ride conti gp4000 25's on my steel, and one thing I noticed on this tire is that it's fairly "tall". (bead to apex).
I actually had to dremel a bit off my FD clamp to get the conti 25s to clear.

My situation in unique tho:
-I ride a compact-ish steel (Salsa La Raza) with fairly short chainstays, so there's little clearance between tire and FD clamp
-aftermarket braze-on adapter clamp is a bit thicker than Campy clamp.
-and as stated, the conti's are "tall"

They do seem a bit more sluggish to spin up to speed vs 23, but the ride sure is nice at around 95psi.
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Old 11-14-10, 08:21 AM
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Originally Posted by Markj61 View Post
I ride conti gp4000 25's on my steel, and one thing I noticed on this tire is that it's fairly "tall". (bead to apex).
I actually had to dremel a bit off my FD clamp to get the conti 25s to clear.

My situation in unique tho:
-I ride a compact-ish steel (Salsa La Raza) with fairly short chainstays, so there's little clearance between tire and FD clamp
-aftermarket braze-on adapter clamp is a bit thicker than Campy clamp.
-and as stated, the conti's are "tall"

They do seem a bit more sluggish to spin up to speed vs 23, but the ride sure is nice at around 95psi.
When I first saw my Coni GP4KS's on my bike, I thought that the LBS mounted 25's instead of
23's because they seemed so much more robust than the Maxxis Categories I had replaced.
They do seem to have a taller profile. I can't say it enough that the ride was an incredible improvement.
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Old 11-14-10, 09:56 AM
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Originally Posted by pgjackson View Post
My bike currently has stock 700X25 tires with tread pattern. I am planning to get new wheels and am considering going with a slick tire in 700X23 size. Will the thinner tire make a noticable difference to a noob like myself on an entry level bike?
My bike came with 700 x 23. I just changed to 25 and like them much better. I see no real difference in speed. I like the lower pressure ( 120 psi versus 160).

Might want to just stick with the 25's.
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Old 11-14-10, 10:21 AM
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Originally Posted by surgeonstone View Post
160
!?

..and 25's at 120psi?
I would think running them that hard would cancel out any cush benefit.

Last edited by Markj61; 11-14-10 at 10:31 AM.
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Old 11-14-10, 11:10 AM
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25s so that I don't have to swerve and avoid all sorts of road undulation. Don't know about the speed thing. Feels no difference to me.
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Old 11-14-10, 11:43 AM
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pgjackson, More than likely going to 23C will introduce a level of harshness not felt before, primarily if you run max pressure listed on the tire, which you don't have to. I recently tested a 25C on one of my bikes and I don't know why I hadn't tried them before.

Brad
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Old 11-14-10, 11:51 AM
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stop whinning about if a tire is smooth and cush...just ride the wheels off it

Thats what cycling all about
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Old 11-14-10, 11:57 AM
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Originally Posted by AEO View Post
the one advantage of narrow tires is in the corners, where there's less sidewall so there's less material that can flex unwantedly.
wider tires will do that, but it's mainly the rim width that causes the unwanted flexing.

Not that you'd notice this with a 25mm to 23mm transition.
It's a bit more noticeable when you use narrow rims with wide tires in the range of 32mm or higher.
Actually the give of a wider rim/wider tire seems to maintain much better contact in the corners for me, especially on roads that aren't perfectly flat (i.e., rain gutter in the intersection).
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Old 11-14-10, 11:57 AM
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Originally Posted by rusted_rider View Post
stop whinning about if a tire is smooth and cush...just ride the wheels off it

Thats what cycling all about
For you, maybe.
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Originally Posted by bragi "However, it's never a good idea to overgeneralize."
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Old 11-14-10, 12:20 PM
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Originally Posted by surgeonstone View Post
My bike came with 700 x 23. I just changed to 25 and like them much better. I see no real difference in speed. I like the lower pressure ( 120 psi versus 160).

Might want to just stick with the 25's.
You must weigh a ton.... because otherwise this is just plain silly.
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Old 11-14-10, 12:24 PM
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Originally Posted by Markj61 View Post
!?

..and 25's at 120psi?
I would think running them that hard would cancel out any cush benefit.
120 is much better than the 160 the 23 mm suggested. In truth my 25 mm are usually around 100 psi.
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Old 11-14-10, 12:29 PM
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25c is ok but personally i prefer 23c. I have ridden 25c before and i don't really notice a difference but i just prefer the 23's. I say go for it. The vittoria rubino pro slicks look nice but so do michellin pro race 3's.
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Old 11-14-10, 03:15 PM
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Ride with as big a tire as your setup will allow. I highly recommend Conti Gator Hardshells.
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