Tyre and internal rim width

[jowwy]

Would or does anyone run a 28mm tyre on an internal rim width of 21mm and how does it ride?

Looking at getting the zipp service course 30 discs

 

[bonsaibilly]

Yes I would - why ever not? - but I never have. (Ran 32s on a 21mm rim hybrid.)

How it would ride, would depend on so many variables not least the bike they're put onto and the person riding it!

BB

 

[jowwy]

Emailed zipp earlier and they sent me an a message back saying that they have been extensively tested with their new speed r28 tyres and have been all ok

 

[Hacienda71]

I run 23's on a 21 mm rim with absolutely no issues whatsoever. Most of the new u shaped aero rims are wide and are run with 23's or 25's so a 28 would be fine if there is sufficient frame clearance.

 

[jowwy]

I run 23's on a 21 mm rim with absolutely no issues whatsoever. Most of the new u shaped aero rims are wide and are run with 23's or 25's so a 28 would be fine if there is sufficient frame clearance.

Internal rim width of 21mm, not external

And yes i have clearance for upto 32mm on the carbon

 

[Hacienda71]

Internal rim width of 21mm, not external

And yes i have clearance for upto 32mm on the carbon

The external width on mine is 25 mm so they are going to be there or thereabouts.

 

[jowwy]

The external width on mine is 25 mm so they are going to be there or thereabouts.

Nice one.....looks like a set of service course 30s will be winging my way after my holidays then