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      01-08-2013, 09:13 AM   #1
Longhorn 35d
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19" vs 20" Wheels and Tires

Hi there,
Bought an E70 35d a few months back and I really like it. Puchased my vehicle with 19k miles and came with the regular 18", the tires were replaced with the same Bridgetone Duelers but non-runflats at the dealer (It was not a BMW dealer, it was Porsche dealer, I have the receipt).
I'm on the fence about keeping this wheel/tire set or moving to a set of 19"s or maybe a set of 20" replicas. I don't hate the 18" but I find the ride kind of plush and some body roll when turning.
What will be the performance/ride quality gain or change in this case?
Should I go with 19"s or 20"s.
Many Thanks,

Longhorn 35d
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      01-08-2013, 07:54 PM   #2
wsybert
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Quote:
Originally Posted by Longhorn 35d View Post
Hi there,
Bought an E70 35d a few months back and I really like it. Puchased my vehicle with 19k miles and came with the regular 18", the tires were replaced with the same Bridgetone Duelers but non-runflats at the dealer (It was not a BMW dealer, it was Porsche dealer, I have the receipt).
I'm on the fence about keeping this wheel/tire set or moving to a set of 19"s or maybe a set of 20" replicas. I don't hate the 18" but I find the ride kind of plush and some body roll when turning.
What will be the performance/ride quality gain or change in this case?
Should I go with 19"s or 20"s.
Many Thanks,

Longhorn 35d
The biggest improvement will be looks. Body roll will not change.
Go with what you like. There will be more road feel the thinner the sidewall and possibly a slightly harsher ride. Not much with a std suspension, IMO. Turn in will feel a little more crisp, as you won't have the taller sidewall moving around.
If you want handling to change dramatically, the suspension will need modified.
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      01-08-2013, 10:19 PM   #3
JNoSol
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Go with 20s. 20" tires are actually cheaper than 19", so you'll make up the cost difference of the wheel size. Plus, it looks better.
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      01-08-2013, 10:58 PM   #4
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Stay with the 18". If you must go bigger then 19" but not 20". IMO the 20s" don't look better and the tires will wear out in no time making the ownership much more expensive. You will not gain but lose performance dragging those heavy anchors around and suffer with a harsh ride and the costly consequences of hitting a pothole. I got 19" from the factory and now I installed 18" with snow tires. The car drives smaller and it is more tossable with the 18"s. I like the look of both.
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      01-09-2013, 02:13 PM   #5
bassman1121
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20s are probably going to be more expensive in the long run and you will sacrifice some ride quality. I put 18s on for the winter and it's like night and day. 20s have much harsher impacts over bumps, although some of that is due to the Dunlop run-flats. Conti DWSs are supposed to be much better and i plan on putting some on when the Duns run down. I got the 20s b/c I'm in Germany and drive speeds well in excess of 100mph and the car feels much more stable on the 20s at high speed. I won't do more than about 100 on the 18s, but that's probably not an issue for you or much of anyone on this board. My fuel economy also improved about 1 mpg when I put on the 18s. With that being said, mostly the 20s are a cosmetic choice. If I had it to do over again I would go with 19" all-seasons.

Of course this is all IMHO. Take it for what it's worth.
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      01-14-2013, 08:23 AM   #6
john pisha
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Quote:
Originally Posted by JNoSol View Post
Go with 20s. 20" tires are actually cheaper than 19", so you'll make up the cost difference of the wheel size. Plus, it looks better.
I just went through the anguish with the configuration of my new X5. No real good aftermarket options in the 19 inch packages, so I went with the 20 inch 333m's and the Conti DWS. Car drives great on these tires & handled the eight inches of snow we received here in Michigan with no problem.

John
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      01-14-2013, 01:04 PM   #7
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Quote:
Originally Posted by john pisha View Post
I just went through the anguish with the configuration of my new X5. No real good aftermarket options in the 19 inch packages, so I went with the 20 inch 333m's and the Conti DWS. Car drives great on these tires & handled the eight inches of snow we received here in Michigan with no problem.

John
We got another DWS fan. I'm running the same setup.
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