Litespeed T1 + Campagnolo Chorus 11 + Campagnolo Shamal Ultra
The tires come up to 24mm wide, roll really well and should theoretically be quite good aerodynamically.
Newer and better rims and tires however, Isn't risky anymore. Normal sized 23c run great up to 19.5mm internal width. And oversized 23c (like Continental 4000sII) even run fine on 21mm internal width.
Really depends on what you're after. A friend with a C59 got some of the new Ultra Shamals... 17mm internal width. I tested these rims with 23mm and 25mm Continental 4000SII tires. He liked the 23mm tires best on these rims. The 25mm tires ended up being a little too big clearance wise for the C59 frameset anyway, at least on the slightly wider rims. Either tire however, seems to be a very good fit on these rims. That's not to say that the fit will be the same on all rims however, you kind of have to experiment in a lot of cases. I actually took some accurate measurements of the actual width of the tires on these rims as well as on some Campy Neutrons (15mm width). The 25mm Conti's on the 17mm internal width rim would indeed be closer to that of 28mm (actual width) if I recall correctly, so if that is a concern to you, then you may want to stick with the 23's.
here's my measured width and height above brake track, note that height measurement is not very accurate because i use ruler, unlike width which i can use calipers.
21mm internal width
Continental 4000sII 23c, width 27.3mm height: between 23 and 24 mm
Vittoria Corsa G+ 25c, width 29.3mm height: 23mm
17mm internal width
Vittoria Corsa G+ 23c width 24.75 height 21mm
Vittoria Corsa G+ 25c width 26.33 height between 22 and 23 mm
Continental 4000sII 25c 26.8 height 25mm+
17mm vs 21mm for height is not very comparable as it is different rims with different sidewall and brake track height.
But it seems like wider rim doesn't make tire much taller at all (unlike width, which increase a lot)
Calnago wrote:Yes, a 23mm clincher on a 17mm internal width rim will be very similar to a 25mm clincher on a 15mm internal width rim.
Nope. It'll be much better.
I've tried 25mm on 15mm rims, and they felt awful. With lower pressures, they behaved funny in corners, and felt sluggish, with higher pressures they were too harsh.
a narrower tyre on wider rim is my choice. I'd definitely go for 23 on 17 if I were the original poster.
https://intheknowcycling.com/2016/04/03 ... eel-sizes/
"The problem comes when riders, having read about all the benefits of wider tires, mount a pair of them on the 15C wide alloy stock wheels that came with most of our new bikes or the upgrade alloy wheels sold by most of the leading wheel makers for the last 3-5 years. A 25C tire on a 15C wheel can feel squishy, even more so if you’ve reduced the air pressure to get more comfort. This squishy feel is a symptom of the tire losing its shape and its tendency to fold back on itself. This is the opposite of the improved handling you are looking for by going to a wider tire."
"A 23C tire on a 19C or narrower wheel – best speed. If you’ve chosen this set-up, crits, road races or TTs and triathlons are probably your passion, deeper aero wheels are probably your preferred hoops and and comfort is further down your list of what matters though there are plenty of wheelsets in this width that will be plenty comfortable to start without the need of a wider tire."
I can only agree with it after having experimenting in the area. I'd definitely not hesitate to put narrow tyres onto wider rims.
- Similar Topics
- Last post
- 2 Replies
- 525 Views
Last post by Kurets
Thu Jul 06, 2017 11:22 am
- 4 Replies
- 584 Views
Last post by sungod
Wed Nov 01, 2017 1:00 pm
- 9 Replies
- 709 Views
Last post by ooo
Mon Sep 25, 2017 9:16 pm
- 17 Replies
- 682 Views
Last post by iamalex
Sat Mar 03, 2018 8:03 am
- 39 Replies
- 2444 Views
Last post by dricked
Thu Jan 25, 2018 7:22 pm