Community driven bicyle tire width measurements - rubbersideup.cc

Started by jeanpierrebalsac, July 26, 2026, 08:47:39 AM

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jeanpierrebalsac

Hello everyone,

As more and more discussions, podcasts and Youtube video's have been revolving around tire width, I decided to create a community driven bicycle tire width measurements database: rubbersideup.cc . A bit like geometry geeks, but then for measured tire widths. So then you can have a good estimation of whether your tire/ internal rim width combination will fall in the 105% rule, or would even clear your frame.

All added home-measurements can be submitted and would be very well appreciated. Also potential improvements can be posted here.

Cheers

Serge_K

Great resource I used again last week. Thank you for putting that together.
To the extent you can, there should be a nuance between the GP5000 and the ALL SEASON version. Idk whether both tyres expand the same on a given rim; they are quite different.

Reply as per below: Ah, so the option is there already, great. People havent been populating these fields then i guess (Conti gp5000 35C).

jeanpierrebalsac

Thank you for the endorsement.

Currently when clicking the model 'Grand Prix 5000', there are versions 'STR', 'TT TR' and 'All Season TR'. So you can make a distinction between how the GP5000 expands in general, but also how the All Season TR expands more specifically. How would you suggest we change this?

damned

such a great tool ! just added mine - I struggled to get a measure for this setup so I hope it'll help people : )

lorenzo

Thank you for the tool! I've just uploaded my measurements.

I think you should also post it on Reddit (maybe in r/Velo) to get more data from fellow gear geeks riders  ;D

jeanpierrebalsac

Thanks for the suggestion. I'm not much of a redditter, so I created an account and tried to upload a new subject the r/Velo, but it got blocked by the moderators. Any tips on how to get it through?

jeanpierrebalsac

Reddit moderators say that cannot allow such sites/apps.

And: Added ranges to the explore page:

jeanpierrebalsac

Hi all,

I have added a tool that estimates your tire width based on nominal width and internal rim width.

It's under the /estimate tab.

Grtz