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2010 2011 BMW 5 Series Forum F10 F10 Technical Topics Wheels / Tires / Suspension / Brakes BMW M5 OEM 20" M343 vs 19" M345
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      05-21-2018, 03:10 AM   #1
FElleven
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BMW M5 OEM 20" M343 vs 19" M345

Please help me decide what rims setup I should take for my AW F11 M550xd. I have bought winter 19" M408 this season and got hooked on concavity. Have put on my 20" M434 last week and I don't like the flat look anymore.

The 19" have better and smoother ride but I prefer the M343 concavity, tho I am not sure if M345 have same concavity? 19" are cast vs 20" forged. Both setups I can get used for almost same price.

19" M345





20" M343



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      05-23-2018, 12:42 AM   #2
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I also contemplated these two sets, but I ended up with the 343’s with non RFT tires. Couldn’t be happier. The ride is now smoother and less harsh, Day and night difference without Runflats.
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      05-23-2018, 03:47 AM   #3
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Quote:
Originally Posted by Freak1c View Post
I also contemplated these two sets, but I ended up with the 343ís with non RFT tires. Couldnít be happier. The ride is now smoother and less harsh, Day and night difference without Runflats.
I already have non RFT on my 20" M434 and I know what are you talking about, it is indeed a huge difference. But when I switch on my winter 19" M408 (also non RFT) its another huge difference vs 20".

I went ahead and bought 19" M345, like the design more and there is concavity that I was after.
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      05-23-2018, 11:26 AM   #4
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Still a great choice, I really like the 345’s also. I just wish they came in 20”.
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      05-24-2018, 12:10 AM   #5
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Post some pics when you get them on.
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      06-14-2018, 09:02 AM   #6
FElleven
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Rims are on! Super satisfied with them. The ride is so much more smoother and it corners better with more sidewalls. Also, I get better feeling on acceleration due to 255/285 combo vs 245/275 I had with 20".
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      06-14-2018, 09:44 AM   #7
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Looks good! Thanks for the pics!
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      06-15-2018, 04:19 AM   #8
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Looks great!

255/40-19 front 285/35-19 rear?
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      06-17-2018, 01:31 AM   #9
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Looks really good. I wish we had estates here in the us !
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      06-17-2018, 04:27 PM   #10
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Originally Posted by .BMW. View Post
Looks great!

255/40-19 front 285/35-19 rear?
yes thats right. I want as much tyre as I can for better traction. The 245 in the front would be more ideal considering height vs 285 on the back, but 255/285 combo is still under BMW recommendations for xdrive, less than 1% difference, in fact BMW factory staggered setup is 245/275 which is exactly the same difference than 255/285.
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      06-17-2018, 04:31 PM   #11
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Quote:
Originally Posted by Freak1c View Post
Looks really good. I wish we had estates here in the us !
Thanks! Yes, the touring is ideal family car and with 50d motor I can still enjoy some fast driving when I want to. I am also towing my caravan and boat with it, so its really practical car for my use.
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