Trackday slicks part #2

I emailed Avon asking for recommendations regarding slicks on the CSR.

Hi Niclas,

As you probably know, the racing CSR run 9”X13” front wheels and 10.5”X13” rear, we developed some radial slicks specifically for this application for use in the CSR Eurocup.

195/530R13 A24 compound

250/570R13 A24 compound

With 15” wheels things are a bit more difficult. I would recommend using radials on a CSR as the car was designed to work best on them (most other Caterhams work better on a cross-ply) but unfortunately we do not make any radials in suitable constructions and compounds for this car in 15”. The cross-ply tyres you have a probably the most suitable we have available but again, these are not perfect due to the split of compound front to rear (A24 front A56 rear).

The cross-ply tyres will only require a small amount of camber, far less than the radial set-up the car would have been built to.

Sorry I can’t be more helpful.

Regards,

Xxxxx

And after a follow up question:

Hi Niclas,

I’ve done a little digging and you are absolutely right, they did run 7” and 9” which were a little bit narrow but seamed to work well.

We have replaced the 175/550R13 front with a 195/530R13 spec number 13800S – it’s actually the same size (don’t ask).

The rear 250/570R13 spec number 9906S is still current.

I’d go with the 7s & 9s and get the necessary rear brake changes done.

Hope this helps.

Regards,

Xxxxx

See also Trackday slicks part #1