***Tire Size Help!!!***

BfromSD · 05-28-2015, 03:24 PM

I just got a set of rims for my 328. 20x8.5 in the front and 20x9.5 in the rear, staggered setup. What size tires should I use? Does 245-30-20 in the front and 275-30-20 in the rear sound about right? Any suggestions would be much appreciated. Here's a pic of the wheels:

Fundguy1 · 05-28-2015, 03:36 PM

Quote:

Originally Posted by BfromSD

I just got a set of rims for my 328. 20x8.5 in the front and 20x9.5 in the rear, staggered setup. What size tires should I use? Does 245-30-20 in the front and 275-30-20 in the rear sound about right? Any suggestions would be much appreciated. Here's a pic of the wheels:

What's the offsets? 275/30-20 will be 1/2" less clearance. I don't see anyone making that size. Probably rub. 285/25-20 probably better. You'll need about a 40 offset rear, 30 front. If the offsets aren't close to this or higher, like they're 20, return them. They'll probably never fit unless you wacky stuff like stretch fenders or small stretch tires. These are going to slow your car noticeably. Those are designed to fit a 750, not a 328. 750 typical offsets are 15-25. I doubt they will work with any tires period.

BfromSD · 05-28-2015, 03:39 PM

Quote:

Originally Posted by Fundguy1

What's the offsets? 275/30-20 will be 1/2" less clearance. Probably rub.

30 front, 35 rear.

Fundguy1 · 05-28-2015, 03:56 PM

Quote:

Originally Posted by BfromSD

30 front, 35 rear.

Well you have a chance then. Get tires that are 26" or less in outer diameter, 285 or less width. Ideal rear would be a 275/25-20 but I don't see those made. 285 is gonna be tight. May need a fender roll. 275/30 tall and may rub. It's 1" taller than stock. Be prepared to have difficulty beating a Prius at a light.

BfromSD · 05-28-2015, 04:27 PM

Quote:

Originally Posted by Fundguy1

Well you have a chance then. Get tires that are 26" or less in outer diameter, 285 or less width. Ideal rear would be a 275/25-20 but I don't see those made. 285 is gonna be tight. May need a fender roll. 275/30 tall and may rub. It's 1" taller than stock. Be prepared to have difficulty beating a Prius at a light.

They have 275-25-20's on eBay. The car came with 18's stock so I'm pretty sure going 20 won't drastically affect my performance. Especially since these wheels are LIGHTER (despite being two inches larger) than my stocks and I have an AA tune, aFE intake and AA exhaust. If I'm having difficulties smoking Priuses from a dig at stop lights then I must be in The Twilight Zone lol. I think I'll be just fine. Thanks for your help/suggestions though. By the way, here's some pics of the wheels on an E46 328i:

Fundguy1 · 05-28-2015, 05:56 PM

I looked on ebay. Saw nitto and accelera Of those I'd go nitto. What's the weight on them? Its cool but also surprising if they are lighter. Americas tire/discount tire sells nitto. I'd try them before ebay.

BfromSD · 05-28-2015, 07:50 PM

Quote:

Originally Posted by Fundguy1

I looked on ebay. Saw nitto and accelera Of those I'd go nitto. What's the weight on them? Its cool but also surprising if they are lighter. Americas tire/discount tire sells nitto. I'd try them before ebay.

26 lbs front, 28 rear. Stock are 31 front, 32 rear (that's WITH tires).

Fundguy1 · 05-28-2015, 08:41 PM

Quote:

Originally Posted by BfromSD

26 lbs front, 28 rear. Stock are 31 front, 32 rear (that's WITH tires).

Well tires on those will make them heavier. that slows you down. Just be ready for it.

BfromSD · 05-29-2015, 12:25 AM

Quote:

Originally Posted by Fundguy1

Well tires on those will make them heavier. that slows you down. Just be ready for it.

Well, all 4 of those numbers are with tires. But yeah, thanks for the help sir.

Fundguy1 · 05-29-2015, 06:58 AM

Quote:

Originally Posted by BfromSD

Well, all 4 of those numbers are with tires. But yeah, thanks for the help sir.

It can't be. A 275/30-20 Hankook tire alone weighs 28 pounds. Your looking at just wheel weigh . Your probably going to add 20-25 pounds+ per corner. Unless the weights you have for stock are wheels only too.

Fundguy1 · 05-29-2015, 07:33 AM

I looked it up. An on 158 328 wheel weighs 20.5 lbs tire us about 22 lbs. So your going from about 43 to 56 rear if thats your stock wheel. Not sure which wheel you have or where you got numbers.

BfromSD · 05-29-2015, 02:30 PM

Quote:

Originally Posted by Fundguy1

I looked it up. An on 158 328 wheel weighs 20.5 lbs tire us about 22 lbs. So your going from about 43 to 56 rear if thats your stock wheel. Not sure which wheel you have or where you got numbers.

Yeah idk, maybe I'm wrong. So what do you suggest for the front?

Fundguy1 · 05-29-2015, 02:53 PM

The 245/30-20 is probably a good fit. Look for tires with an outer diameter of 25.5"-26" and a width of 235-245 front, 265-275 rear. Those fit on my e93 OK. Not 100% for 4 door but I think it's good.
I have 235/35-19 on 19x8.5 et30 front and 275/30-19 on 19x9.5 et35 rear. No rubbing. I'm going to 245/35-19 on 19x9 et.30 front and 305/30-19 on 19x11 et42 rear. Should fit with a fender roll.

Fundguy1 · 05-29-2015, 02:54 PM

Do you know what the different numbers stand for?

BfromSD · 05-29-2015, 03:56 PM

Quote:

Originally Posted by Fundguy1

Do you know what the different numbers stand for?

Yeah, width, sidewall height and diameter right? Anyways, I ended up buying 245-30-20 for the front and 275-25-20 for the rear. Hopefully that works. Had to go with the Accelera's, those Nitto's were like $700 a PAIR lol. Couldn't do it.

Fundguy1 · 05-29-2015, 06:42 PM

OK. Good luck. Let me know how they fit.

BfromSD · 06-07-2015, 02:50 PM

Quote:

Originally Posted by Fundguy1

OK. Good luck. Let me know how they fit.

They ended up fitting perfect, and no rub at all! Thanks for your help, I appreciate it. Here's a pic:

05-28-2015, 03:24 PM	#1
BfromSD New Member 4 Rep 29 Posts Drives: 2011 BMW 328i Join Date: Feb 2015 Location: Beale AFB, CA iTrader: (0)	*Tire Size Help!!!* I just got a set of rims for my 328. 20x8.5 in the front and 20x9.5 in the rear, staggered setup. What size tires should I use? Does 245-30-20 in the front and 275-30-20 in the rear sound about right? Any suggestions would be much appreciated. Here's a pic of the wheels: Attached Images
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05-28-2015, 05:56 PM	#6
Fundguy1 Major General 2032 Rep 8,339 Posts Drives: 335 e93 Join Date: Aug 2014 Location: Orlando, fl iTrader: (0)	I looked on ebay. Saw nitto and accelera Of those I'd go nitto. What's the weight on them? Its cool but also surprising if they are lighter. Americas tire/discount tire sells nitto. I'd try them before ebay.
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05-29-2015, 07:33 AM	#11
Fundguy1 Major General 2032 Rep 8,339 Posts Drives: 335 e93 Join Date: Aug 2014 Location: Orlando, fl iTrader: (0)	I looked it up. An on 158 328 wheel weighs 20.5 lbs tire us about 22 lbs. So your going from about 43 to 56 rear if thats your stock wheel. Not sure which wheel you have or where you got numbers.
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05-29-2015, 02:53 PM	#13
Fundguy1 Major General 2032 Rep 8,339 Posts Drives: 335 e93 Join Date: Aug 2014 Location: Orlando, fl iTrader: (0)	The 245/30-20 is probably a good fit. Look for tires with an outer diameter of 25.5"-26" and a width of 235-245 front, 265-275 rear. Those fit on my e93 OK. Not 100% for 4 door but I think it's good. I have 235/35-19 on 19x8.5 et30 front and 275/30-19 on 19x9.5 et35 rear. No rubbing. I'm going to 245/35-19 on 19x9 et.30 front and 305/30-19 on 19x11 et42 rear. Should fit with a fender roll.
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05-29-2015, 02:54 PM	#14
Fundguy1 Major General 2032 Rep 8,339 Posts Drives: 335 e93 Join Date: Aug 2014 Location: Orlando, fl iTrader: (0)	Do you know what the different numbers stand for?
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05-29-2015, 06:42 PM	#16
Fundguy1 Major General 2032 Rep 8,339 Posts Drives: 335 e93 Join Date: Aug 2014 Location: Orlando, fl iTrader: (0)	OK. Good luck. Let me know how they fit.
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