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      08-18-2019, 07:55 PM   #1
Wmzorba09
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Can I change to wider rear tires on my M340i?

Picked up a new M340 last week. love the car, however the tires are all season Bridgestone 225/40/19 all around. This set up doesn't come staggered - anyone know if the back tires can be replaced with 245's or 250's? I'd be interested in replacing the 2 back tires l, getting the same But at 245 or 250. I much prefer the staggered look. Anyone have any knowledge or experience with this? Thx.
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      08-18-2019, 08:20 PM   #2
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Those are the 19 inchers right? Don't you have to order the 19 inch option that gives you 255's in the rear?
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      08-18-2019, 08:31 PM   #3
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On the staggered setup the rear wheels are wider. You have 8 x 19 all around. The staggered are 8 x 19 front and 8.5 x 19 rear.

225 or 235 width is ideal for a 8" wide wheel. Max tire width is 245 however the tire shop may have a nightmare trying to get run flats in that size on a 8" wide wheel. And your only choice is 245/35 which is 3.5mm shorter sidewall than the oem tire 255/35.

You may or may not have issues with the speedo accuracy and/or some options such as DA+. I'm just not sure and don't want to recommend in the blind.
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      08-18-2019, 08:36 PM   #4
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Quote:
Originally Posted by ThatKrazyPolak View Post
Those are the 19 inchers right? Don't you have to order the 19 inch option that gives you 255's in the rear?
Yes, they are 19's but the staggered setup only comes with the sport tires. These are all-season tires. For whatever reason BMW doesn't use staggered as standard set-up when using all-season tires. So on this car it's 225 front and rear... I want to replace the rear all season tires to 245 or 250 so that the vehicle is staggered, but I don't know if I'm able...
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      08-18-2019, 08:43 PM   #5
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Quote:
Originally Posted by claykin View Post
On the staggered setup the rear wheels are wider. You have 8 x 19 all around. The staggered are 8 x 19 front and 8.5 x 19 rear.

225 or 235 width is ideal for a 8" wide wheel. Max tire width is 245 however the tire shop may have a nightmare trying to get run flats in that size on a 8" wide wheel. And your only choice is 245/35 which is 3.5mm shorter sidewall than the oem tire 255/35.

You may or may not have issues with the speedo accuracy and/or some options such as DA+. I'm just not sure and don't want to recommend in the blind.
Thanks for the reply. Appreciate your feedback. Called NTB this afternoon and they wouldn't do it- ideally if I could put 245's that would be fine, but like you I'm not sure if it would work or if it's even advisable. I am happy with the all seasons, just prefer the staggered look - more sporty.
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      08-18-2019, 09:22 PM   #6
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Quote:
Originally Posted by Wmzorba09 View Post
Thanks for the reply. Appreciate your feedback. Called NTB this afternoon and they wouldn't do it- ideally if I could put 245's that would be fine, but like you I'm not sure if it would work or if it's even advisable. I am happy with the all seasons, just prefer the staggered look - more sporty.
If you do decide to try a swap, make sure the shop you use has an automated tire changer. The old school tire changers require a lot of physical force from the worker and your wheels don't stand a chance of surviving without being scared.

Your dealer has a more advanced tire changer as is required by BMW. Most dealers have of one of the center clamp tire changers listed on Hunter Engineering website (or the previous generation). If the shop you choose doesn't have one of these, RUN! Many tire shops have upgraded to one of these (or a competitor to Hunter), but many also still have tire changers from the 80s.

https://www.hunter.com/tire-changers
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      08-18-2019, 09:45 PM   #7
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Thanks for the tip. The BMW sales agent at the dealer I purchased from actually told me the set up was staggered. I took her word and didn't bother checking myself until after I drive off the lot ( mistake, lesson learned)...if I do get new tires - installing them is the least they can do to make things right.
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      08-18-2019, 10:53 PM   #8
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Quote:
Originally Posted by Wmzorba09 View Post
Thanks for the tip. The BMW sales agent at the dealer I purchased from actually told me the set up was staggered. I took her word and didn't bother checking myself until after I drive off the lot ( mistake, lesson learned)...if I do get new tires - installing them is the least they can do to make things right.
Dealer typically will only install the tire size called for by BMW for that wheel size. I'll be surprised if they help you with it. Good luck.

Some CA's are great, others aren't worth a pot of beans. Any reasonably smart/trained CA knows on a 3 series the all season setup has same size front/rear. Been this way for years!

Not long ago, BMW took their CA's to events to introduce new models. They spent time discussing attributes, training them on the new features, etc. Today, the CA's are typically on their own to watch webinars.
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      08-18-2019, 11:11 PM   #9
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Quote:
Originally Posted by claykin View Post
Quote:
Originally Posted by Wmzorba09 View Post
Thanks for the tip. The BMW sales agent at the dealer I purchased from actually told me the set up was staggered. I took her word and didn't bother checking myself until after I drive off the lot ( mistake, lesson learned)...if I do get new tires - installing them is the least they can do to make things right.
Dealer typically will only install the tire size called for by BMW for that wheel size. I'll be surprised if they help you with it. Good luck.

Some CA's are great, others aren't worth a pot of beans. Any reasonably smart/trained CA knows on a 3 series the all season setup has same size front/rear. Been this way for years!

Not long ago, BMW took their CA's to events to introduce new models. They spent time discussing attributes, training them on the new features, etc. Today, the CA's are typically on their own to watch webinars.
Thx. Suffice it to say my Sales Agent obviously falls into the "pot of beans" category ... this isn't the only issue I've had working with her and on this transaction, but I digress.
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      08-19-2019, 12:19 AM   #10
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Short story you can't. All your wheels are 8" wide and 245 or 255 width tires are a poor fitment for that size wheel. You'll have to buy new wheels if you truly want staggered.
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      08-19-2019, 12:42 AM   #11
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A 245/35/19 tire should work, it is also available in the same Bridgestone tire.
You are ~1% off the 225/40/19, which is not too bad. Speedo could be effected.

Then again, on a M340, I would run a classic staggered summer tire setup and then use this set in winter.
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      08-19-2019, 07:52 AM   #12
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Quote:
Originally Posted by Transfer View Post
Short story you can't. All your wheels are 8" wide and 245 or 255 width tires are a poor fitment for that size wheel. You'll have to buy new wheels if you truly want staggered.
Quote:
Originally Posted by mathys View Post
A 245/35/19 tire should work, it is also available in the same Bridgestone tire.
You are ~1% off the 225/40/19, which is not too bad. Speedo could be effected.

Then again, on a M340, I would run a classic staggered summer tire setup and then use this set in winter.
Thx. Definitely don't want to get into changing out the wheels. That's money I don't want to spend. If there is a chance that swapping 245's will adversely effect the function of the vehicle in any way, I don't want that either. Sounds like it may not be worth it and I may have no choice but to settle for less than my desired setup.
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      08-19-2019, 08:10 AM   #13
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You can go on https://www.bmwpartspros.com and purchase two wheels at a better price than getting them from dealership. Also get a set of summer tires and call it a day. This way you will have a winter setup and only have to dismount two tires. I get rid of my run flats on my cars and purchase a mobility kit.
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      09-08-2019, 07:22 PM   #14
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Quote:
Originally Posted by Joro2819 View Post
You can go on https://www.bmwpartspros.com and purchase two wheels at a better price than getting them from dealership. Also get a set of summer tires and call it a day. This way you will have a winter setup and only have to dismount two tires. I get rid of my run flats on my cars and purchase a mobility kit.
+1. Just get the wider OEM rear wheels and get the 255/35/19 tires. Personally, I would ditch the front tires too and go 235/40/19 front and 265/35/19 rear. 225 is way too little tire for a car this big.
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      09-09-2019, 12:14 AM   #15
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Quote:
Originally Posted by onefastdoc View Post
Quote:
Originally Posted by Joro2819 View Post
You can go on https://www.bmwpartspros.com and purchase two wheels at a better price than getting them from dealership. Also get a set of summer tires and call it a day. This way you will have a winter setup and only have to dismount two tires. I get rid of my run flats on my cars and purchase a mobility kit.
+1. Just get the wider OEM rear wheels and get the 255/35/19 tires. Personally, I would ditch the front tires too and go 235/40/19 front and 265/35/19 rear. 225 is way too little tire for a car this big.
Would the 235 fit on the 8" front wheel? I am thinking of doing this and buying 2 wider wheels for the rear (265) and putting a set of summers on them and using the current square setup for winter.
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      09-09-2019, 12:28 AM   #16
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235 will fit on 8" wide wheel but 265 wont fit on the BMW 8.5" wide rear if you want to go that route. The 225/255 sizing is the best you're gonna get on OEM wheels.
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      09-10-2019, 07:10 PM   #17
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Quote:
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235 will fit on 8" wide wheel but 265 wont fit on the BMW 8.5" wide rear if you want to go that route. The 225/255 sizing is the best you're gonna get on OEM wheels.
Thanks! Might be worth waiting for some aftermarket wheels to become available.
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      10-04-2019, 12:48 PM   #18
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Slap on a 255/35/19 and it will look amazing. I have 225/40 F and 255/35 R.
Am going to be putting on 235/40/19 - 265/35/19 next.




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      10-05-2019, 09:21 AM   #19
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Quote:
Originally Posted by Transfer View Post
235 will fit on 8" wide wheel but 265 wont fit on the BMW 8.5" wide rear if you want to go that route. The 225/255 sizing is the best you're gonna get on OEM wheels.
My shop seems to think the 265 WILL fit on the 8.5" rim. Doing the test fit on Tue......
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      10-05-2019, 04:42 PM   #20
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Quote:
Originally Posted by BarryB View Post
Quote:
Originally Posted by Transfer View Post
235 will fit on 8" wide wheel but 265 wont fit on the BMW 8.5" wide rear if you want to go that route. The 225/255 sizing is the best you're gonna get on OEM wheels.
My shop seems to think the 265 WILL fit on the 8.5" rim. Doing the test fit on Tue......
It may fit. But it may also look bad and may also give you worse handling. I wouldn't do it on my car.
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      10-05-2019, 04:51 PM   #21
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Quote:
Originally Posted by Transfer View Post
Quote:
Originally Posted by BarryB View Post
Quote:
Originally Posted by Transfer View Post
235 will fit on 8" wide wheel but 265 wont fit on the BMW 8.5" wide rear if you want to go that route. The 225/255 sizing is the best you're gonna get on OEM wheels.
My shop seems to think the 265 WILL fit on the 8.5" rim. Doing the test fit on Tue......
It may fit. But it may also look bad and may also give you worse handling. I wouldn't do it on my car.
Ok thx
PS this is at a bmw dealer too so see what they sayin the end. Haven't paid for anything yet
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      12-16-2019, 06:38 AM   #22
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Quote:
Originally Posted by Wmzorba09 View Post
Picked up a new M340 last week. love the car, however the tires are all season Bridgestone 225/40/19 all around. This set up doesn't come staggered - anyone know if the back tires can be replaced with 245's or 250's? I'd be interested in replacing the 2 back tires l, getting the same But at 245 or 250. I much prefer the staggered look. Anyone have any knowledge or experience with this? Thx.
Answers to your question is on the F30 forums- engine being the only major difference between F30 and G20. Wheels, tyres and brakes are a transformative experience. For example, stock my setup came as yours, and was mediocre. Changed it for Ray's Japan. Ray's are the best forged aftermarket set worth buying- and Ray's makes BBS and Vorsteiner wheels via its 10,000 ton press but charges 1/3 of the price. That is as, once wheels became bigger than 17", the only press that could do it for the entire segment is located in Japan. Although larger than stock, the Rays wheels were stronger and lighter, saved 25lbs per wheelset vs OEM, migrating to 8.5" front and 9.5" rear, which gave me about several staggered options and 40 tyre combos.. can run 235/265, 235/275, 225/255, 245/275. Then 3D continuous carbon ceramic fibre discs shaved off another 14kg, 31lbs, so the car overall gained .3 s acceleration through those 50lbs of unsprang weight removed. Shackles gone.

With the right tyres, more grip, lighter wheelset, you car will seem like a much faster beast.
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