Hi, after a fairly quiet one last year (not to mention unreliable) we're getting ready for the new race season in the 205.
We've always run standard 1.9 wheels with 195 50 r15 yoko A048 tyres, but we have to change to Toyo R888R or R888 this year due to the regs for the championship we're entering so we're also considering some new wider wheels.
I know there are benefits to reducing un-sprung weight and getting lighter wheels would help out with the handling, but I'm less sure about the benefit of going wider especially on a light car like the 205.
On a very basic level increasing the tyre contact patch doesn't necessarily increase grip as the pressure on the contact patch decreases correspondingly, but I know it's nowhere near as simple as that (slip angles, tyre deflection, temperature, wear rate all change) !
So to give a specific example would there be much benefit from moving from the standard 6J wheels with 195 width tyres to:
- 7J wheel 195 50r15 tyre
- 7J wheel 205 50r15 tyre
Anyone have any experience?
It's a challenge to fit a wider wheel / tyre on our car at the mo as we run the wide body Gaz coilovers with -3 degree camber up front, so have to use a 10mm spacer just so the tyre clears the damper body.
I think fitting a 7J wheel with a 205 width tyre would mean we'd also have to fit wider arches too as the tyre would stick out beyond the standard arches, so I'm tempted to go for a set of C5 steelies and continue with the 195 50 r15 tyres unless there's proven benefit to running the wider tyre.