32 mm tires on 21mm rims? Yes or no?

[terrabike01]

I currently have 700x38mm tires on my gravel bike. The internal width of the wheels is 21mm. I was thinking about putting some 700x32mm tires on the bike for some road riding. All the charts say that 35mm is the narrowest tire I can safely put on a 21mm rim. Anyone run 32mm tires on a 21mm rim and live to talk about it? Any thoughts? Safe or not?

 

[szymon]

I use 21mm internal mtb wheels on my cross bike with 28mm gravelracer tires or 25mm durano dd tires, never had a problem. The only thing is road tires run about 2-3 mm wider on wider rims, so the 28mm is like a 31mm and the 25mm is about 28mm.

 

[MadisonDan]

I'm running 33mm PDX tubeless on some Stan's MTB rims which are 21.6mm internal width. Shouldn't be a problem.
Have at it!

 

[terrabike01]

I'm running 33mm PDX tubeless on some Stan's MTB rims which are 21.6mm internal width. Shouldn't be a problem.
Have at it!

Awesome! Thanks Dan. Stay safe brother.

 

[hotsauce]

My road rims are 20.2mm internal and I run 23mm tires. You're more than fine. ETRTO is a joke!

 

[terrabike01]

My road rims are 20.2mm internal and I run 23mm tires. You're more than fine. ETRTO is a joke!

Wow. Those are narrow.
Thanks for all the replies.

 

[qclabrat]

we talking tubular or clincher?

 

[hotsauce]

Wow. Those are narrow.

Just a Pacenti SL23 v2 rim with Michelin Pro4 SC tires. In truth the tires measure 25mm or so with digital calipers. I'd run wider but I have Cannondale clearance problems.

 

[terrabike01]

we talking tubular or clincher?

I'm talking clincher.

 

[terrabike01]

I use 21mm internal mtb wheels on my cross bike with 28mm gravelracer tires or 25mm durano dd tires, never had a problem. The only thing is road tires run about 2-3 mm wider on wider rims, so the 28mm is like a 31mm and the 25mm is about 28mm.

I'm running 33mm PDX tubeless on some Stan's MTB rims which are 21.6mm internal width. Shouldn't be a problem.
Have at it!

You guys talking clincher or tubular?

 

[szymon]

I'm running them as clincher with tubes.

 

[terrabike01]

I'm running them as clincher with tubes.

Awesome. Thanks for the feedback.

 

[MadisonDan]

Tubeless clinchers.

 

[Jmann]

I run 25c on my pacenti rims (which I think are 21 internal). They measure 26.5mm with the wider rims but I've never had a flat, which I consider a win. I wouldn't stress it

 

[Jmann]

And that's at least 5k with the same tire rim combo.