Wide Rims and Tires: Real Measurements

Everything about building wheels, glueing tubs, etc.
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mpulsiv
Posts: 1279
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: 966
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: 654
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: 530
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: 114
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: 66
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: 654
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

Hexsense
Posts: 654
Joined: Wed Dec 30, 2015 12:41 am

by Hexsense

Resurrect old thread with more data:

Light-bicycle 56mm deep, 30mm external width and 23mm internal width.
@70psi
Vittoria Corsa G+ 25c 30.45mm (stretched)
Continental GP Force 3 25c 30.1mm (stretched)
Continental GP5000 28c 30.15mm (new) -> the GP5000 28c size only a tiny bit wider than GP4000sII 25c.
Pirelli Pzero Velo 25c 29.06mm (new)
Pirelli Pzero Velo 25c 29.8mm (stretched)
Pirelli Pzero Velo 28c 30.89mm (new)
Pirelli Pzero Velo 28c 31.?? mm (stretched) -> lost the measurement.

emotive
Posts: 114
Joined: Tue Nov 01, 2016 10:40 am
Location: Melbourne, Australia

by emotive

thanks for the update. Good to have some data points on the new tyre models.

jlok
Posts: 800
Joined: Tue Jun 30, 2015 3:30 am

by jlok

Enve 4.5 AR Disc, 25mm hookless internal width
Hutchinson Fusion 5 Performance Tubeless Ready 11Storm, 28c
31.9mm measured width at 60psi
Giant Propel Advanced SL Disc 1 / BMC TM02 < Propel Adv < TCR Adv SL Disc < KTM Revelator Sky < CAAD 12 Disc < Domane S Disc < Alize < CAAD 10

NickJHP
Posts: 193
Joined: Wed Feb 14, 2018 2:22 am
Location: Canberra, Australia

by NickJHP

Compass Bon Jon Pass extralight on Light Bicycle RRU25C02 rims: 36.5mm wide (stretched, setup tubeless).

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emotive
Posts: 114
Joined: Tue Nov 01, 2016 10:40 am
Location: Melbourne, Australia

by emotive

Specialized S-Works Turbo 28 on Light Bicycle RR36C02 (22C hookless inner) 30.4mm on the front @50psi, 31.0mm on the rear @60psi, after 1500km. Tubes.
Compass Bon Jon Pass (35mm) Extralite on Light Bicycle RM29C06 (22C hookless inner) 37.6mm wide @40psi after 1500km, 38mm after 3000km, setup tubeless.
Compass Snoqualmie Pass (44mm) Extralite on Light Bicycle RM29C06 (22C hookless inner) 43.3mm wide @30psi, when new, setup tubeless. After 700km these haven't stretched at all.

morganb
Posts: 651
Joined: Wed Mar 15, 2017 5:30 pm

by morganb

Compass Babyshoe (standard casing) 650Bx42mm measure 44.0mm on Roval Traverse SL 30mm internal rims, so most likely true to size or slightly undersized on a more conventional width rim. This was taken immediately after tubeless set up, but they had lived on another set of rims for a year so I imagine they won't stretch any more.

biwa
Posts: 66
Joined: Fri Sep 21, 2018 8:39 pm

by biwa

Anyone with Light Bicycle 17.9mm internal/25mm external widths rims? Would like to know the mounted tire width for 25mm tires (e.g. GP 4000S II or Schwalbe One V-Guard). Thx!

by Weenie


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