Wide Rims and Tires: Real Measurements

Everything about building wheels, glueing tubs, etc.
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mpulsiv
Posts: 1044
Joined: Mon Mar 24, 2014 9:17 pm

by mpulsiv

Hexsense wrote:Latex can stretch 7.5 times.
Butyl can stretch 1.5 times.

So, no. unless your tube is very undersized to save weight from the start, i'll be more than fine.


While, latex can stretch up to 7.5 X, can 19-24mm tube be used on a that measure 30-32mm wide (e.g. 28mm Conti 4000S)
https://m.probikekit.com/bicycle-inner- ... 21072.html
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Delorre
Posts: 962
Joined: Sat May 24, 2014 12:09 pm

by Delorre

mpulsiv wrote:
Hexsense wrote:Latex can stretch 7.5 times.
Butyl can stretch 1.5 times.

So, no. unless your tube is very undersized to save weight from the start, i'll be more than fine.


While, latex can stretch up to 7.5 X, can 19-24mm tube be used on a that measure 30-32mm wide (e.g. 28mm Conti 4000S)
https://m.probikekit.com/bicycle-inner- ... 21072.html


I use normal Michelin Ultralite innertyres in my 28mm gp4000s, completely trouble free, although I have to admit, my 28mm's have only seen a couple of 100 miles :oops: But it was on gravel and cobbles :evil:

by Weenie


Hexsense
Posts: 462
Joined: Wed Dec 30, 2015 12:41 am

by Hexsense

mpulsiv wrote:
Hexsense wrote:Latex can stretch 7.5 times.
Butyl can stretch 1.5 times.

So, no. unless your tube is very undersized to save weight from the start, i'll be more than fine.


While, latex can stretch up to 7.5 X, can 19-24mm tube be used on a that measure 30-32mm wide (e.g. 28mm Conti 4000S)
https://m.probikekit.com/bicycle-inner- ... 21072.html

Yes, but i'll be thin.
How exactly thin it is to be problematic, i don't know. So it's just safer to use bigger 25-28c version for the tire that big.

ClydesdaleChris
Posts: 128
Joined: Tue May 23, 2017 8:53 am

by ClydesdaleChris

Continental GP4000Sii 28mm, measures 31mm (!) On 17c rim. However they are 29mm high, which is a problem in most frames, even some disc and new-generation direct mount frames.

Ive found that it just touches inside of caliper when standing up and pedalling.
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Beaver
Posts: 448
Joined: Wed Aug 18, 2004 6:06 pm
Location: Lower Saxony - Germany

by Beaver

Does anyone have the real width of a GP 4000SII 28mm on the 25C Enve 4.5 AR?

They should be quite wider than the 31mm wide rim?

emotive
Posts: 59
Joined: Tue Nov 01, 2016 10:40 am
Location: Melbourne, Australia

by emotive

Beaver wrote:
Mon Apr 16, 2018 1:41 pm
Does anyone have the real width of a GP 4000SII 28mm on the 25C Enve 4.5 AR?

They should be quite wider than the 31mm wide rim?
34mm measured, according to Darren Baum of Baum Cycles, though I can't find a link now.

Note Enve recommend you only use 'tubeless ready' tyres, so they seat well on the hookless rim on the 4.5AR, so Darren has switched to Schwalbe Pro1 28mm which measure 31.5mm wide. You can still use tubes in the tubeless ready tyres if you wish.

nachetetm
Posts: 20
Joined: Fri Aug 18, 2017 8:54 pm

by nachetetm

Here are my measurements:
Challege Paris-Roubaix open tubular (27c claimed)
On 17c Fulcrum R7-> 29.8
On 19c Kinlin XR22T->30.5

Challenge Elite open tubular (25c claimed)
On 19c Kinlin XR22T-> 27.3

Panaracer Gravelking (32c claimed)
On 15c rims-> 29.6

Hexsense
Posts: 462
Joined: Wed Dec 30, 2015 12:41 am

by Hexsense

23mm internal width is here

Light-bicycle 56mm deep, 30mm external width and 23mm internal width.
@70psi
Vittoria Corsa G+ 25c -> 30.45mm
Pirelli Pzero Velo 25c -> 29.06mm

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