will a 245 tire size fit on a 7.5in rim?

135i racer · 12-16-2008, 09:20 AM

i just bought some new rims and wondering will my stock runflats will work the rims are 7.5 the rear stock tires are 245 just wondering if they'll work thanks

arrutled · 12-16-2008, 09:41 AM

don't think so, think 225 is max, back me up someone

ZIPNBYE · 12-16-2008, 10:07 AM

A 245-35-R18 tire can be mounted on an 8" wheel, but the tire company websites that I just scanned all recommend an 8.5" wheel.

So, I too would say no.

135i racer · 12-16-2008, 11:55 AM

what about 235 tire

david @ eas · 12-16-2008, 12:36 PM

235 size tire will not work on that 7.5 wheel. You would need at least a 8" wheel to run that.

If you're looking to run fatter tires, you're going to have to run some aftermarket wheels first.

larryn · 12-16-2008, 12:37 PM

At SCCA nationals this year, there were 135's with stock width wheels (7.5") that were running 275's on them in front. Strange, but true. The amount fo cross section getting to the pavement might not have been a whole heck of a lot though. :smile:

For daily use, I would not go beyond the recommended wheels width specifications.

SV Concepts II · 12-16-2008, 01:12 PM

I've tried all 3 tires on 7.5'' wheels with Bridgestone, Falken, and Yokohama street tires and the 235's have been my favorite so far. They feel like the best compromise between contact patch and sidewall flex.

As Jurian mentioned, if you want to run wider tires your best bet is to get wider wheels to match.

ZIPNBYE · 12-16-2008, 01:47 PM

Quote:

Originally Posted by 135i racer

what about 235 tire

Depends on the sidewall aspect ratio. A taller tire has the room to be mounted on a narrower wheel, whereas a shorter tire cannot.

Your question was in relation to the stock tire size...but now changing the width, you don't say what height.

135i racer · 12-16-2008, 02:14 PM

the stock tires on the rear are 245 40 18 i think the stock rim is 8.5 my new rim is 18x7.5

Cris · 12-18-2008, 10:27 AM

Quote:

Originally Posted by 135i racer

the stock tires on the rear are 245 40 18 i think the stock rim is 8.5 my new rim is 18x7.5

The OEM rear tires are actually 245/35/18; OEM wheel size is correct at 8.5x18. As other are saying, I highly recommend you running no more than 225/40/18 in the front and 255/35/18 in the rear.

modbargains · 12-18-2008, 01:50 PM

I would suggest that you not run anything more then 225 on a 7.5in wide.

Berduderunner · 12-19-2008, 05:26 PM

Quote:

Originally Posted by Ali@Jlevi SW

I've tried all 3 tires on 7.5'' wheels with Bridgestone, Falken, and Yokohama street tires and the 235's have been my favorite so far. They feel like the best compromise between contact patch and sidewall flex.

As Jurian mentioned, if you want to run wider tires your best bet is to get wider wheels to match.

^ sounds about right, but ima stick w. 225's... Star Spec's baby!

Bahraini135 · 12-21-2008, 03:01 AM

just fyi, I ran a 245/40/18 on the stock 18x7.5 front wheels. It was a competetion tire and was intended for off-road use. I spent 4 days driving it on the streets as well and it was fine. Except that it looked buldgy and was higher than stocks. Will post pics once uploaded.

12-16-2008, 09:20 AM	#1
135i racer Beamer Boy 7 Rep 75 Posts Drives: Soon to be M3, or M6 who knows Join Date: Oct 2008 Location: Killeen Tx, Iraq iTrader: (2)	will a 245 tire size fit on a 7.5in rim? i just bought some new rims and wondering will my stock runflats will work the rims are 7.5 the rear stock tires are 245 just wondering if they'll work thanks
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12-16-2008, 09:41 AM	#2
arrutled Colonel 104 Rep 2,474 Posts Drives: Olsa Join Date: Jun 2008 Location: Western Mass iTrader: (0)	don't think so, think 225 is max, back me up someone __________________ AW 135i w/ blackette, performance short shift kit, BMW alarm, Performance rotors, APEX ARC-8 wheels, Direzza Star Spec 235/275, Dinan stage 3 suspension, M3 wishbones/tension rods/front sway/rear subframe bushings and thats all folks!
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12-16-2008, 10:07 AM	#3
ZIPNBYE Let's save military ranks for those who earn it! 45 Rep 1,161 Posts Drives: ...on the Ragged Edge Join Date: Dec 2008 Location: Edmonton, AB, Canada iTrader: (6) Garage List 2013 BMW e92 M3 Cou ... [7.50] 2013 BMW e84 X1 xDr ... [7.00]	A 245-35-R18 tire can be mounted on an 8" wheel, but the tire company websites that I just scanned all recommend an 8.5" wheel. So, I too would say no. __________________ Richard 2013 BMW M3 Individual -- Fire Orange (sold) 2013 BMW X1 xDrive35i M-Sport -- Valencia Orange (sold) 2011 BMW 1-series M Coupe (#205/220) -- Valencia Orange (sold) 2009 BMW 135i M-Sport Coupe -- Space Grey (sold)
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12-16-2008, 11:55 AM	#4
135i racer Beamer Boy 7 Rep 75 Posts Drives: Soon to be M3, or M6 who knows Join Date: Oct 2008 Location: Killeen Tx, Iraq iTrader: (2)	what about 235 tire
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12-16-2008, 12:36 PM	#5
david @ eas 256 Rep 4,048 Posts Drives: BMW Join Date: Mar 2008 Location: Anaheim iTrader: (5)	235 size tire will not work on that 7.5 wheel. You would need at least a 8" wheel to run that. If you're looking to run fatter tires, you're going to have to run some aftermarket wheels first.
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12-16-2008, 12:37 PM	#6
larryn Lieutenant General 2148 Rep 10,176 Posts Drives: '97 332ti, '21 X5 45e, '16 GT4 Join Date: May 2005 Location: Seattle iTrader: (2)	At SCCA nationals this year, there were 135's with stock width wheels (7.5") that were running 275's on them in front. Strange, but true. The amount fo cross section getting to the pavement might not have been a whole heck of a lot though. :smile: For daily use, I would not go beyond the recommended wheels width specifications.
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12-16-2008, 01:12 PM	#7
SV Concepts II 269 Rep 6,093 Posts Drives: E90 M3 Join Date: Dec 2008 Location: 1460 White Oaks Rd. Suite F Campbell, CA 95008 iTrader: (7)	I've tried all 3 tires on 7.5'' wheels with Bridgestone, Falken, and Yokohama street tires and the 235's have been my favorite so far. They feel like the best compromise between contact patch and sidewall flex. As Jurian mentioned, if you want to run wider tires your best bet is to get wider wheels to match.
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12-16-2008, 02:14 PM	#9
135i racer Beamer Boy 7 Rep 75 Posts Drives: Soon to be M3, or M6 who knows Join Date: Oct 2008 Location: Killeen Tx, Iraq iTrader: (2)	the stock tires on the rear are 245 40 18 i think the stock rim is 8.5 my new rim is 18x7.5
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12-18-2008, 01:50 PM	#11
modbargains Brigadier General 170 Rep 3,160 Posts Drives: 08 E90 335i & 01 Toyota Avalon Join Date: Sep 2008 Location: La Habra, CA iTrader: (5)	I would suggest that you not run anything more then 225 on a 7.5in wide.
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12-21-2008, 03:01 AM	#13
Bahraini135 First Lieutenant 28 Rep 340 Posts Drives: 09 M-Packaged 135i Join Date: Sep 2008 iTrader: (0) Garage List 2009 11.85@116.4mph ... [10.00]	just fyi, I ran a 245/40/18 on the stock 18x7.5 front wheels. It was a competetion tire and was intended for off-road use. I spent 4 days driving it on the streets as well and it was fine. Except that it looked buldgy and was higher than stocks. Will post pics once uploaded. __________________ '73 240z Triple-Carbed '03 350z Supercharged '09 135i Twin-Turbocharged *11.85@116.4mph*
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