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      04-15-2010, 02:01 PM   #1
Grillo
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what's the largest size we can safely mount on the stock 18" wheels?

hi

just want to know what's the largest size we can safely mount (w/o rubbing) on the 135i stock 18" wheels? do hankook v12 evo 265/35/18 rub?

thanks
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      04-16-2010, 07:26 AM   #2
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+1
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      04-16-2010, 08:25 AM   #3
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255/35 max rear 235/40 max front
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      04-16-2010, 02:52 PM   #4
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Quote:
Originally Posted by arrutled View Post
255/35 max rear 235/40 max front
I hear people say 225 max front, some say 235 max front. Dont know who to believe anymore.
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      04-16-2010, 03:17 PM   #5
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From what i have read 225 is the safe bet, 235 would be dependant on the specific tire, as apparently all tires are not the exact width they state on the tire.
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      04-16-2010, 03:42 PM   #6
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Is that fender-clearance related or strut / spring perch related?
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      04-16-2010, 04:08 PM   #7
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Quote:
Originally Posted by bradford View Post
Is that fender-clearance related or strut / spring perch related?
on the stock wheels it's both. 235 is close to both sides.
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      04-16-2010, 04:20 PM   #8
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If you search hard enough you will find posts made by member bdh21 who has 235/40 direzza star specs (wide running) up front. He also happens to be a close friend of mine who I will see tomorrow. Believe it!
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      04-16-2010, 04:36 PM   #9
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See now I'm worried. I want to get star specs but some people have said 235s in the front are too wide... I really want 235s though. Does your friend experience any rubbing at all? Stock suspension?
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      04-16-2010, 07:04 PM   #10
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He said it rubbed once or twice. Never while autocrossing though. only at this one place on the way to his gf's a dip and a turn at the same time.
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      04-16-2010, 08:59 PM   #11
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who cares about the front.... how big can you go in the rear??? i wanna do like 275 for drag racing... you think i will have any issues??? i went 265 with the 335i... can i do 275 on that rim and on the 135i?

I just bought a spare set of rear Rims for this... so dont worry iam not gonna drive everyday with em.... just when i go to the track...

Mina

Last edited by xxx_mina; 04-16-2010 at 09:08 PM.
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      04-16-2010, 09:09 PM   #12
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Quote:
Originally Posted by xxx_mina View Post
who cares about the front.... how big can you go in the rear???

Mina
lol i guess if you're not concerned with turning that's ok =)

i think my next set of rims will be the apex ones and i'll try to do 245 front and 275 rear
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      04-16-2010, 09:20 PM   #13
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I have a 275/35 on the Apex arc-8 rear 9.5 et 62
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      04-16-2010, 09:21 PM   #14
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Quote:
Originally Posted by scorcherjf View Post
lol i guess if you're not concerned with turning that's ok =)

i think my next set of rims will be the apex ones and i'll try to do 245 front and 275 rear
so 275 rear can be done on stock rims????

Quote:
Originally Posted by arrutled View Post
I have a 275/35 on the Apex arc-8 rear 9.5 et 62
isnt stock like 8.5?
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      04-17-2010, 12:47 PM   #15
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Quote:
Originally Posted by xxx_mina View Post
who cares about the front.... how big can you go in the rear???
Mina

+1

i want to know if V12s 265/38 on the stock rim wont rub.
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      04-17-2010, 01:36 PM   #16
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Quote:
Originally Posted by xxx_mina View Post
so 275 rear can be done on stock rims????



isnt stock like 8.5?

Do not put 275 on stock rims! Apexraceparts created a custom one series wheel which allows us to run up to 275 out back. your best bet is 255 on stock.
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      04-17-2010, 09:03 PM   #17
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225 F 255 R Star Specs work great and are a tremendous improvement over the RFTs. I would not want to try 235s up front. Why risk rubbing issues vs. going with a great tire that will perform well. I'd put 225 Star Specs up front against most any other 235s any day.
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      04-18-2010, 02:13 AM   #18
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Quote:
Originally Posted by arrutled View Post
Do not put 275 on stock rims! Apexraceparts created a custom one series wheel which allows us to run up to 275 out back. your best bet is 255 on stock.
What happens when you put 275 or 265 on stock rims??? why cant i do it???

Mina
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      04-18-2010, 04:14 AM   #19
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Quote:
Originally Posted by xxx_mina View Post
What happens when you put 275 or 265 on stock rims??? why cant i do it???

Mina
1. The sidewall of the tyre will be angled in too far, risking the rim pinching the sidewall and damaging it on bumps.

2. The tyre will be very difficult to mount.

3. The tread will not be in full contact with the road due to it being curved, as the sidewalls are pulled in too tightly.

4. 265/35-18 and 275/35-18 tyres are a bit tall for the 1-series, exacerbating clearance issues, 265/30-18 or 275/30-18 tyres don't seem to be available sizes.

5. Manufacturers only support the fitting of 215/40-18 to 255/35-18 tyres on the stock rear 8.5" rim. The stock front 8" rims will fit tyres from 205/40-18 to 245/35-18.
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      04-18-2010, 04:48 PM   #20
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Quote:
Originally Posted by aerobod View Post
The stock front 8" rims will fit tyres from 205/40-18 to 245/35-18.
Stock fronts = 7.5"
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      04-18-2010, 05:15 PM   #21
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Quote:
Originally Posted by Pol View Post
Stock fronts = 7.5"
Sorry, I was thinking of the Z4 stock sizes.

1-series staggered 7.5" stock fronts will take tyres up to 225/40-18 to stay within manufacturers specifications.
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      04-22-2010, 02:42 PM   #22
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Quote:
Originally Posted by aerobod View Post
1. The sidewall of the tyre will be angled in too far, risking the rim pinching the sidewall and damaging it on bumps.

2. The tyre will be very difficult to mount.

3. The tread will not be in full contact with the road due to it being curved, as the sidewalls are pulled in too tightly.

4. 265/35-18 and 275/35-18 tyres are a bit tall for the 1-series, exacerbating clearance issues, 265/30-18 or 275/30-18 tyres don't seem to be available sizes.

5. Manufacturers only support the fitting of 215/40-18 to 255/35-18 tyres on the stock rear 8.5" rim. The stock front 8" rims will fit tyres from 205/40-18 to 245/35-18.
is this all theories or has someone actually tried 275/35-18 and failed miserably????

also these will be track(drag) tires only.... so iam gonna be running them on low pressure (should fix curve issues) and i will defenetly look out for these problems before i put them on the car..... also my car is stock hight... so taller tires shouldnt be a problem in anyway...

just give me a week and i'll tell you if they are good or not... i've done 265/35/18 on my 335i with no problem... so we'll see what happens with 275/35/18....
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