Steve Whitehorn

iTrader: (13)

Hi
I currently have the Prodrive 17' 10 spoke rims on my scoob. And they come with that unusual 205/45 ZR17 tyre size. Currently fitted with Pirelli PIs. I need new tyres quick. I can only find Pirelli P1s in 205/45 ZR17 and don't want another set.

I really want different tyres. Goodyear F1/Toyo's/Bridgestone's.
If I change my tyre size to 205/40 ZR17 I will probably have more chance of finding one of the above alternatives.

However will changing my tyre size from 205/45 ZR17 to 205/40 ZR17 be a bad thing - will this effect my speedo readings and generaly screw things up??

Thanks
Cheers
steve

Ian E

iTrader: (1)

Steve,

Most people go for 215/40 ZR 17 - these are available in a wide range of alternatives (Bridgestone, Goodyear, Toyo, etc.) and the rolling diameter is very similar.

Cheers,

Ian.

Steve Whitehorn

iTrader: (13)

So Ian
Is it because that the rolling diameter is only slightly different that it doesn't have any bad effect?
Steve

Ian E

iTrader: (1)

After a quick search more info can be found here:-

http://www.orbweb.net/autoshop247/tyre_talk/8_wheel_info.html

You'll have no probs with 215/40 17 - I'm running SO2s in that size on my MY00 at the moment.

Cheers,

Ian.

Steve Whitehorn

iTrader: (13)

Thanks Ian

StuBoy

You could also try this

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

Coogie

Have a look at my thread (16" - 17") - there's a tyre size calculator on there so you can compare sizes,

Nick.