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What are the widest wheels you can put on the back of an MNR
sonic - 11/11/08 at 10:04 PM

As title really

I have always thought that the wheels on the back of some 7 type kits look to narrow.

So assuming i stick at 15"
What would be a good width wheel and tyre to go fore

Thanks

Paul TigerB6 - 11/11/08 at 10:07 PM

Go too wide and you will affect the balance / handling and not for the better. I think 205's are about right with the power of an R1 but guess you could stretch to 225's if you really have to.

omega0684 - 11/11/08 at 10:43 PM

what engine are you running and what power does it have, i run 205/50/15's on the back of mine and they povide plenty of grip for my 2.1 pinto. i have a mate who runs 225/50/15's on the back of his dax and he runs a nissan turbo! i think most people would say that 195's are more than adequate.

graememk - 11/11/08 at 11:39 PM

i run 215 / 17's on the back of my nissan turbo if that helps, i think when i change i'll go 195 front and 205 rear

Ivan - 12/11/08 at 05:38 AM

I'll add my vote for not much wider than 215 and prefferably 195 to 205.

Agriv8 - 12/11/08 at 08:32 AM

I have 225's on 15inch rims 7j or 7.5J cant remeber .

Not been for a run yet so cant tell you if they rub or not.

you also have to rember that it not just a case of what will fit under the arches, but also what wont make contact with the uprigh shock ect ect so width , radius and ofset all come into play.

i would think 205 is enough for most.

regards

Agriv8

sucksqueezebangblow - 12/11/08 at 09:34 AM

Advice I got from MNR for best wheel/tyre combination for fastest lap times was 195/13 front and 205/13 rear. Apparently gives max grip while keeping unsprung weight down for handling. Only reason to go bigger than 13 is to get bigger brakes in (which is not necessary on a 440Kg car but)

I'm told MNR are working on new rear wings that will take 225s but I imagine they are only of value on CECs, or for drivers who prefer understeer bias for safety.

[Edited on 12/11/08 by sucksqueezebangblow]

Agriv8 - 12/11/08 at 10:23 AM

quote:
Originally posted by sucksqueezebangblow
Advice I got from MNR for best wheel/tyre combination for fastest lap times was 195/13 front and 205/13 rear. Apparently gives max grip while keeping unsprung weight down for handling. Only reason to go bigger than 13 is to get bigger brakes in (which is not necessary on a 440Kg car but)

I'm told MNR are working on new rear wings that will take 225s but I imagine they are only of value on CECs, or for drivers who prefer understeer bias for safety.

[Edited on 12/11/08 by sucksqueezebangblow]


I would agree with that.

regards

Agriv8

sonic - 12/11/08 at 01:52 PM

Thanks for the replies guys

I am running 195/50/15s at the moment but don't look that wide from the rear

Thanks