Tyre sizing issue

[ashley348]

Right, I'll take it back and get a larger one. On the one hand they were good, accepting the tube they sold me had failed at the neck of the valve, so I only had to pay £2 more. But it's lame of them to have given me the wrong size, even lamer of me for not checking!!! Cheers

 

[andrew_s]

The guy at Halfords gave me this, clearly wrong, they're so useless!!!

They will stretch to fit the tyre, so they will work OK in a 700x37 tyre, but because they are stretched, the self-sealing won't work very well.
Slime tubes also come in 700x35-42 and 700x47-54 (aka 29x1.85-2.2).

Officially you should use the 700x35-42 size, though I'd be tempted to use the 47-54 size if I cared much about the self-sealing.
I dare say Halfords were selling what they had in stock.

 

[ashley348]

They will stretch to fit the tyre, so they will work OK in a 700x37 tyre, but because they are stretched, the self-sealing won't work very well.
Slime tubes also come in 700x35-42 and 700x47-54 (aka 29x1.85-2.2).

Officially you should use the 700x35-42 size, though I'd be tempted to use the 47-54 size if I cared much about the self-sealing.
I dare say Halfords were selling what they had in stock.

TBH, I went back, that's the largest they do, guy was nice enough so I'm gonna just try it. Next time I'll buy some decent tubes/sealer.