Who has the program that you type in your tyre profile and it works out rolling radius as i need to work out wot tyres i want.

 

http://www.gearboxman.co.uk/inforatios.html

In the excel sheet there are fields to calc rolling tyre radious

 

What size tyres are they and who makes them, as they differ between manufacturers. I should then be able to find out rolling radius from a dealer...

 

Well i'm trying to work out wot width rim to run.And need to know wot tyres are available

 

This any use to you?

http://www.miata.net/garage/tirecalc.html

 

Well give me a clue then .

 

As you may be aware Michael.I damaged my outer casings on my BBS.So i am looking at going maybe bigger on width as i need new outers anyway.

The size i have now are
front = 7" width with ET30 running 215 40 16 tyres
Rear = 8" width with ET20 running 225 40 16 tyres

Looking to go maybe 7 1/2" on front with 225 40 16
and 8 1/2" or 9 " on rear with tyre. ??????

Now do your stuff.

 

www.rochfordtyres.co.uk/TyreCalc.asp

 

I think you're going to struggle for a sufficiently wide rear tyre in a 16" size. Move up to 17" and the world is your lobster .

 

but the 17" outers wont fit on the 16" inners michael.

 

I know that, but not many manufacturers make performance tyres for go-kart rims .

 

some contractor at work said that the other day.... dont think he realised what he said though

 

That's it see mike i want it to handle like a go kart not follow every TRAM line in the road.

Wot's the biggest you know of/can get in 35 profile.

 

Don't know of any in 35 profile on a 16" rim .

 

Buggar .Looks like 225 40 is the biggest available then.

 

Hence my comment about 17s .