doga-ot

iTrader: (1)

I have a set of lattice wheels on my saph which was 4x4 so tyres are 205/50/1.
Rear are now bald and car is no longer 4x4 it is now back to how it should be 2wd, I now need to replace rear tyres for time being until I find a set of 17's I want.
My question is what is the widest tyres I can run on these alloys bearing in mind I need to keep them ???/50/15(for rear) i think they are 7j

When I run 17's I will be running 225/35-40/17 on back and 215/35-40/17 on front

Cheers

doga-ot

iTrader: (1)

Anyone

skinnarbi

The problem is you would need either a 215/45r15 or a 225/40r15 the problem is after a quick search I can't find availability in either size, and if they were they would be considerably more expensive than 205/50r15. I'd stick with 205's until you change the wheels.

Regards
Matt

Mondego

Another issue to consider is, in order to maintain rolling radius, or wheel diameter, the profile needs to change in direct ratio to the tyre width. Since the profile is given as a percentage of the width. e.g, a tyre with profile 50 (%) with a tread width of 200, would mean the profile equates to 100mm (half, or 50% of the width). So changing one and not the other will result in a change in wheel diameter/rolling radius.

Use a tyre size calculator to ease the headache:

http://www.discovery2.co.uk/tyresize.html

Mondego

Oops, i just realised there is a trye size calculator right here on passionford.

skinnarbi

As I mentioned above. Those tyre size calculators are good but sometimes as in this case to keep the rolling radius right you end up with a size that either doesn't exist or is so uncommon the price becomes uneconomical especially as its only temporary until new wheels are purchased

Regards
Matt

doga-ot

iTrader: (1)

just put new 205/50/15 on today till I get my hocks

Mondego

@Wes: Good job as they're temp.

@Matt: Agreed. I use tyre calculators, but like you said, I dont rely on the result being final.

doga-ot

iTrader: (1)

When I get my 17's (Hock's) i'm going to run 235/40/17 rear, 215/40/17 front on et40 or rear 225/40/17 and front 215/40/17

Mondego

Should look sweet. Bigger the better!

doga-ot

iTrader: (1)

Dnt know how wide I can go as I have koni adjustable's so not sure if 235/40/17 will rub

Mondego

225/235, it's only an extra 10mm (5mm on either side of the tyre)

You should be OK, but either will look great....

skinnarbi

I had some 245/40r17 on my old saph with 10mm spacers and longer studs and they only rubbed over big bumps and if I had passengers in the back. Only put them on as I picked them up part worn from work as a bloke with a merc wanted a set of 4 even though his rears were still at 5mm

Mondego

Serious width. Nice.

Although, Doga's Koni's probably have the ability to sit him pretty low if he wishes...