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///M3 Forum
The BMW E46 ///M3 is the M version E46 and puts out an amazing 333 HP and 262 lb-ft of torque at stock specs! There are an amazing amount of modifications for both the coupe and convertible models so read up and get started modifying your cars today!

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Old 02-05-2013, 06:04 PM   #1
Bmwdad
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Join Date: Jan 2013
Location: Moline, IL
Posts: 63
My Ride: 2003 M3
Help with tires sizes!

Just got my M3 last week and the tires that are on it are as follows.
Front 225/45R18
Rear 265/35R18

The fronts need to be replaced but the rears are almost new. I thought you should run 225/45 or 245/40 on front and 255/40 or 275/35 on the rear. Is it fine to keep my rears until they need replaced. Can I run that size on the rear with either size fronts?

Sorry first car with staggered fitmet. On the subie you just bought all 4 at once, same size.
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Old 02-06-2013, 12:21 PM   #2
2002topasblueM3
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Join Date: Apr 2012
Location: Maryland
Posts: 132
My Ride: 2002 M3
You should be fine with running 225 in the front. But if I were you I'd either run 225/45/18 front and 255/40/18 rear or I'd run the correct upsize of 245/40/18 front and 275/35/18 rear. I wouldn't play with the in between sizes cuz they can hinder your handling and cause the dsc to kick in at inappropriate times due to mismatching tire speed caused by the incorrect tire sizing
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Old 02-06-2013, 12:35 PM   #3
Bmwdad
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Join Date: Jan 2013
Location: Moline, IL
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My Ride: 2003 M3
Ya I want to run the correct upsize. I read about how the wheel speeds could throw of the dsc off. I just didn't want to take off the 265/35 rears since they have so much life left in them. Maybe I'm being cheap
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Old 02-06-2013, 07:50 PM   #4
2002topasblueM3
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I totally understand. It's not cheap it's just using what you have. I need to get a set of rears soon cuz mine are about done. But I'm gonna try and wait until my fronts are worn down too before I replace them cuz I wanna upsize to 245 front and 275 rear. It's just more economical that way than throwing away perfectly good tires. Same as you. But ya wanna talk about cheap? I replaced my vanos and solenoid by myself in my garage because I wanted to save money. And my maintenance 2 lol so trust me I know all about being cheap. You aren't anywhere near as bad as me
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