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View Full Version : E30 17'' Maximun tires size???


nickrally
07-08-2004, 02:29 PM
which size i can go to if im lowered with 17'' Enkei wheels!
i know 205-40-17 but
215-45-17 should fit?
maybe 225-50-17???
Please help me!:huh?:

Bob Loblaw
07-08-2004, 02:54 PM
215/45 will fit but it will be bigger than stock. 215/40 would be a bit better.

225/50 will be way bigger than stock. 225/40 would be just about perfect.

For the 205's, the best aspect ratio would be 45.

nickrally
07-08-2004, 02:56 PM
thanks

Bob Loblaw
07-08-2004, 03:02 PM
No problem.

punnzzells
07-08-2004, 03:37 PM
a max member has put 235/40-17's on his car and had to do some fender rolling... so ya, 225/45or 40 is the best...

mike.

6piston
07-08-2004, 03:42 PM
i'm running fine with 17X7 on 215/45/17 Dunlop SP9000s
the rear will rub under load and corners fortunately my car isn't too low.

yes the overall diameter is significantly increased and the speedo doesnt read very accurately now. it reads slower. and if the GTECH pro comp is accurate, my actual speed for example at 70mph the dash speedo reads 65~mph

i was running 40series Toyo Proxes T1-S ant Trampio Guwns all the time before this and it felt better and more comfortable compared to the rock solid Dunlop SP9000 45series! so if you're looking for comfort going up 1 series doesn't mean it's going to be better since tyre softness plays a big part.


but i would tell everyone to stay away from Dunlop SP9000 for all reasons. it's really hard and it doesn't outperform the toyos...

Jordan
07-08-2004, 07:54 PM
215/40R17 is ideal for keeping your speedometer accurate.

any other size will make your speedo display a incorrect speed.

BimmerKris
07-08-2004, 09:01 PM
i had 224/45's and this is what they looked like, i took them off because it ate a bit more fuel then i liked.

i whent to 215/40's i'll get new pics soon, my car just got finished today

http://www.maxbimmer.com/forums/showthread.php?threadid=32850

Bob Loblaw
07-08-2004, 09:38 PM
Originally posted by Jordan
215/40R17 is ideal for keeping your speedometer accurate.

any other size will make your speedo display a incorrect speed.

Nope. 225/40 is more accurate than 215/40.

BimmerKris
07-09-2004, 12:00 AM
i couldn't find a set of 225/40's i was told they never made them like that, thats what i wanted

Jordan
07-09-2004, 12:06 AM
Bob: my 215/40R17's stood up next to a stock wheel and tire are a slight bit taller then the stock wheel and tire.

A 225/40R17 would be slightly taller still.

Sorry but I'm afraid you are wrong.


Kris:

Nitto makes a 225/40R17

I don't know of any other companies that do.

Bob Loblaw
07-09-2004, 09:19 AM
Stock: 195/65 14. Total diameter: 14 + 2(.65 X 195 / 25.4) = 23.98 in.

215/40 17 Total diameter: 17 + 2(.4 X 215 / 25.4) = 23.77 in.

225/40 17 Total diameter: 17 + 2(.4 X 225/ 25.4) = 24.09 in.

N.B. "25.4" is the conversion factor between millimeters and inches.


So the difference between stock and the 215's is .21 in (with the 215's being 0.9% smaller than stock) and the difference between stock and 225's is .11 in (with the 225's being .046% bigger than stock).

So 225's are closer to stock size than 215's (by double the percentage). Just sayin'. ;)

But these differences are marginal at best so either size would obviously be acceptable. Especially with 15-year old speedometers.

But in the end, 225's look better. :)

Bob Loblaw
07-09-2004, 09:33 AM
Originally posted by Jordan

Nitto makes a 225/40R17

I don't know of any other companies that do.

There's also the Pirelli P-Zero Nero (http://www.1010tires.com/tire.asp?tirebrand=Pirelli&tiremodel=P%2DZero+Nero).

Mystikal
07-09-2004, 03:16 PM
The most important part of the question hasn't been addressed.

What is the offset?

C ///M
07-10-2004, 03:22 PM
Originally posted by Jordan
215/40R17 is ideal for keeping your speedometer accurate.

any other size will make your speedo display a incorrect speed.

Are you ****ing serious?

OH MY GOD!! When my speedo reads 120mph, I'll really be going 122.2mph with my 235/40s!!! :rolleyes: :rolleyes: :rolleyes:

Wow jordan, I never thought you'd ever say something that lame. As if BMW speedometer's are perfectly accurate anyway.

ara325
07-10-2004, 04:55 PM
I have 225/45/26's on the 8" rear wheel. I had to have my fenders rolled too because it used to rub under bumps etc. Just make sure that the overall diameter is the same as what the stock setup should be. I may be wrong, but I believe the overall diameter should be 24", so your tire width and profile will depend on your overall diameter requirements. Also, your rim should be at least 7.5" wide to properly fit a 225 + tire on it.

ara325
07-10-2004, 04:56 PM
ooooops, my tire size is actually 16", not 26"....I wish!