Tubular Tyre Help

[novemberdelta]

Hi,

I have just replaced a 700x22 Continental competition with a new tub on my TT bike. The new tyre is a Vittoria 700x23, but it is marked 23-28. It is not fitting properly on the bike, as it seems to be too large and is rubbing the frame. Have I bought the wrong type of tyre? I am new to tubs, not sure where i have gone wrong.

 

[Smokin Joe]

1mm should not make a difference though tyre widths do seem to be a guesstimate rather than an accurate measurement. Is it a dedicated TT bike with very tight clearances?

A picture would help.

 

[midlife]

My Vittoria Rally tubs are a bit hit and miss. I don't even think some of them are actually round ! Cheap though

Shaun

 

[novemberdelta]

Hi. It's a thought clearance tt bike. It is rubbing at the top right of the picture. Thanks.

 

[novemberdelta]

My Vittoria Rally tubs are a bit hit and miss. I don't even think some of them are actually round ! Cheap though

Shaun

I don't mind a lack of quality, it's just for the turbo. It needs to be able to rotate though

 

[fossyant]

They are a bit chunky the Rally. Better off buying a new wheel and a turbo tyre rather than running a nice disk wheel on a turbo. Double check the wheel is seated properly as it doesn't seem to be following the arc of the frame very well.

 

[HarryTheDog]

Being a TT bike has your bike got horizontal dropouts, if so is the wheel as far back in the dropouts as it will go ?

 

[Cuchilo]

Try re-seating the wheel . Take the pressure off the skewer and the wheel and pull the back brake . Then re-tighten the skewer .
I have the same disk but wouldnt use a disk and tub on the turbo

 

[S-Express]

I don't mind a lack of quality, it's just for the turbo. It needs to be able to rotate though

You run a disk wheel on a turbo? Why?

 

[novemberdelta]

Just because I'm new to it and don't know any better. Should I just run a standard clincher on the back? I appreciate the advice, cheers.

 

[Cuchilo]

Just because I'm new to it and don't know any better. Should I just run a standard clincher on the back? I appreciate the advice, cheers.

Buy a cheap clincher rear wheel and a turbo tyre and fit the same cassette you race with .

 

[Smokin Joe]

The frame is actually a poor design. Close clearance I can understand, but when you go to fag paper levels you are just asking for trouble to no advantage. A fractionally oversize tyre, out of true wheel or something slightly misaligned during manufacture or build and you are buggered. A few more mm gap and no problems.

 

[ayceejay]

You might want to check that you have fitted the tyre properly as with close clearance it is essential to centralise your tubs, Did you fit it yourself? Personally I find Rally's cheap and cheerful but they roll up small so a keep one as a spare. Having said that I agree with the cheap wheels and trainer tyre option for a turbo.

 

[Marchaugh]

New to tubular tyres and just wondering, when you pre glue a spare tub, how do you fold it? Does it matter if the glued faces touch together?
Appreciate help, thanks

 

[Smokin Joe]

New to tubular tyres and just wondering, when you pre glue a spare tub, how do you fold it? Does it matter if the glued faces touch together?
Appreciate help, thanks

It doesn't matter.