So the wheels that came on my bike, Profile Design Armada 30, show in the specs that:

"The clincher rims can accommodate 22-24mm tire widths using the ISO or ETRTO measurement system. Do NOT use wider or narrower tires as rim/tire damage or a crash may occur."

Rim width shows as 19mm (assuming external). I was thinking of trying wider tires (25mm or 28mm) before reading this, but I'm assuming this means I'm out of luck?

25mm tires should be fine if you have frame clearance.

Ok cool, thank you!

unless there is something strange about that particular hoop, 25mm tires should be fine.

25mm is right on the edge if they're 13C wheels. If they're 15C certainly no issue.

How can I tell? It says 19mm in the specs for rim width, assuming that is external so not sure what internal is.

The specs say they're 14mm internal.

EDIT: It's usually on some label or engraved somewhere on the wheel itself. ymmv. You can try eyeballing it.. if the 19mm is the INTERNAL width, an inflated 23mm tire would probably only be a little wider than the rim at the braking surface.

Alternatively, get out a ruler.
From sheldon brown's site.. you want to measure the inner rim width in millimeters

I'm usually good at Google. I somehow overlooked that haha. Thank you!

As long as he balances the wheels...

And fills with nitrogen

Not c, mm. C is only related to diameter/circumference.

"cm" is the abbreviation for centimeter; don't make it more confusing.

incorrect

for you, perhaps, but the rest of the world is what I was referring to.

Maybe I was supposed to use the lower case 'c'.. sorry. Even so, I have no idea what the 'c' actually stands for.. or maybe because it is lower case it is the same as mm ?
ie as in this old standby..

cm is the abbreviation for centimeter. That much is correct.


c does not = millimeter or centimeter.

And clay bar the frame.......to reduce drag at one particular yaw angle.

I did not say it does; my point was there is no way you could make the confusion of "c=centimeter" because the abbreviation for centimeter is not "c".

The use of "c"-- whether upper or lower case-- in tire sizing designations comes from, as I understand it, the old French system of designation different wheel sizes alphabetically, e.g. 650B, 700C, etc. When referring to a specific tire size, the convention was to append the wheel size letter to the end of the whole string, rather than after the rim size, so we see, for example, 700 x 23C instead of 700C x 23.

In any case, the designation is largely meaningless except, perhaps, to distinguish when you're referring to both a rim inner width (or bead seat width, BSW) and a tire size and need to avoid confusion, for example, "I'm running a 23(C) on a 23(mm), but thinking of moving up to 25 (C)".

You read the specs. You copied the specs here. They say 22-24mm. You expect us to tell you you can use 25 or 28mm and everything will be OK?
NO! You could CRASH, and then you could DIE.

Seriously, if you really want wider tires, get suitable wheels.

This is correct.

Just to make things more complicated, "C" could also be an abbreviation for Celsius.

So.. to make a long story short, C = 700 wheel size. got it. Out of curiousity, I posted the ETRTO chart for 13 thru 29c wheels. Does the tire to wheel size compatibility change for B size wheels.. and if there are As or Ds or Es, etc?

In fact! But don't.

Those of us in the small wheel world of folding bikes, trikes, recumbents, and minivelos are accustomed to talking in terms of ERTRO designations already, e.g. 406, 451, but wouldn't it be nice if we all dumped the whole 700C/27.5/29er thing and just talked ERTRO? It would make some discussions easier, anyway.

yes sir

As to the OP's original question, I still think he'd be fine with 25mm tires.