Width of a 27 1-1/4 inch tyre

j_vora

Hello :

Would anyone know the width in mm of a 27 1-1/4 inch tyre ?

Is it 1.25 inches equivalent in mm ( ie 31.75mm ) - Or some other number ?

I am trying to “compare” the ride quality of a bike I used to ride eons ago on similar road conditions that I will once again ride on with a contemporary bicycle that I will purchase shortly.

I do understand this is not an equal comparison for the different frame materials ( perhaps even tyre technology etc. ), but as I mainly have the previous experience to work with I am trying to arrive at some “base-line” in terms of ride-quality I can expect based on tyre width.

This is important as I have narrowed down my choice to 2 frames - One that can accommodate 28C & the other to 32C & hope to “match” the earlier ride experience.

I also appreciate that this is just one variable among a few others that will be considered as I make the final decision on the optimal bicycle to purchase.

Hope some of you have an answer to my above question.

Thanks in advance.



Jai

dj58

Jai
The ISO equivalent is 32 x 630mm, from the description of the roads you will be riding, I would say go for the bike that will take a 32C or larger size tyre. As eluded to in your other post, you can go down a size if required, though difficult to increase the tyre size if you choose a bike with limited frame clearances. Your choice of tyre size will of course, be dictated by the type of brake system used, rim or disc.

j_vora

Hello DJ58 :

Your confirming that a 27 1-1/4 tyre's width being equivalent to a 32C and the discussions from previous posts where you provided valuable advice confirms and ratifies that a frame that can accommodate 32C is the way to go - This is now settled and the bike chosen



Sound advice, as always !


Much appreciated,

Jai