eduskator

Hey guys,

Long story short, I am getting a set of Schwalbe Pro Ones for my 2021 season and I was wondering if some of you had measured the width difference between a tire on a hooked rim and the same tire on a hookless rim to see what's the actual difference?


Giant says that a 25c tire on a hooked rim has the same width than a 23c tire on a hookless rim, so I guess that a 25c tire on a hookless rim must be close to 28mm. My actual tires (came with the bike) are the following: CADEX Road Race, tubeless, 700x28mm (25c). I checked on the sidewall and it's indeed a 700x25c, but it seems like they are 28mm ''in reality''.

I am wondering if I should get 700x25c or 700x28c. What do you think?

WhyFi

There are going to be a lot of differences here and there - internal rim width, hookless vs not, different tire manufacturers/models/generations, etc.

The current Schwalbe Pro One Evo Addix are meant to measure out to their nominal size on 19mm internal width rims, though. Find out the internal width of your rims and adjust the estimate from there.

dmanthree

What kind of rims do you have? I'm a retro-grouch and see no point to hookless rims. IMHO...

Dean V

Not exactly sure what the question is, but will say that 28mm Schwalbe Pro1 on my Enve 4.5AR rims are around 32mm wide.

eduskator

Giant SLR-1 wheels (hookless - 19.4mm). I was asking if a specific tire on a hooked rim had a different width than on a similar rim (same size, same width) but hookless design because Giant says (see below) that I have 28mm tires, but the actual size of my tires are 700x25c. If I get 700x28c instead, will I actually have wider tires than 28mm?

• Tires
  CADEX Road Race, tubeless, 700x28mm (25c), folding

WhyFi

Again, it depends. Where is the manufacturer measuring internal width - between the hooks or under them? Which tire manufacturers? Etc. What I can say is that the nomenclature that Giant is using for those tires isn't standard and they're confusing the matter instead of clarifying it.

Regardless, the Schwalbe Pro One Evo Addix are made for 19mm int width rims, making them very narrow by the standards of only a couple years ago, and should measure out close to their nominal size on your wheels. Will the POEA in 28mm be wider than 28mm on your rims? Maybe a hair. Is your clearance that tight that it wouldn't accommodate 29 or 30mm actual? If you've got the room, just try it out. I only got 2.5k-3k miles out of my rear POEA, so if try them out and if you decide to go with the 25mm next time, take two or three months to get their tread life out of 'em and move on.

Sy Reene

I'm a bit confused on the premise. Cadex is its own brand of wheel and tire (or is this a Giant company/subsidiary?).
URL assist:
https://www.cadex-cycling.com/us/hoo...rim-technology

eduskator

Giant owns Cadex.

My 2021 TCR came with Giant SLR1 rims & Cadex Road Race tires. My 2018 TCR came with Giant SLR1 rims & Giant Gavia Race 0 tires.

Both rims and tires must come from the same place and be close to similar.

eduskator

Thread update: I ended up getting the 28mm.

If anyone is curious, they measure 28.7mm inflated at 70psi on my hookless rims (19.4mm inner width).

I did not get a chance to measure the actual width of my previous tires, but the new ones a lightly wider for sure. It feel a lot better to run 70psi than 85psi I was running with the 25c.