Tyre questions

[Hilly]

Tyres not my strong point …
Have a machine with 18.4 /34/14 , if i want wider but same rolling radius what can i get ?

 

[Nearly]

 

[clbarclay]

Anything much wider than you already have probably ought to go on a wider rim wheel too.

 

[Hilly]

So reading above i could go 600/65/r34 same rolling radius but id need new rims ?

 

[clbarclay]

The 600/65r34 should be on about a 20" wide rim. Specifications can vary between manufacturers. 18" rims is listed as an alternative for one I looked at.

Some people on here have run tyres on even narrow rims that the manufacurers state, but it's a case of do so at your own risk. 14" though is a lot lot narrower than 20".

 

[Boohoo]

520/70r34 should go on the same rim ok without being out of shape.