What size tires can I replace my OEM's with?
 

I have a 2009 X5 with OEM 255/55 18inch runflat wheels and tires. The runflats I got Michelins, wore out quickly and have a rougher ride. I dont like them. I bought a spare tire kit and put it in the trunk so I can go with a standard (non runflat tire). My only problem is that there isnt a big choice in that original size.
I really like the Michelins LTX's (had them on my '01 X5) but they dont come in that size. Is there another size I can use on my 18" rim that comes close enough to the originals that it wont make much difference?

TR shows ~68 species of tires in your size...
http://www.tirerack.com/tires/TireSe...55&diameter=18

Should be a set on there that you like/worth the price.
GL, mD

Bill K, I suggest you look at Conti DWS, an all weather tire. I have them on my E53 in your existing size and am very pleased with them. In MD, you get enough weather in winter months to benefit from their decent ice/snow performance, without really sacrificing much summer performance, so long as you are driving it as an SAV and not like you stole it ... I have had the Mich LTX m/s [and a/ts] on other vehicles [big Ford pickups] and really like them, but find the Conti DWS a fine tire for an X5. I had them in a similar size on a roadster [SLK] and they wore well on that demanding application [staggered, no rotation ....] Smooth, quiet ride for an all-weather, and reasonably priced, too.

Bill K, I suggest you look at Conti DWS, an all weather tire. I have them on my E53 in your existing size and am very pleased with them. In MD, you get enough weather in winter months to benefit from their decent ice/snow performance, without really sacrificing much summer performance, so long as you are driving it as an SAV and not like you stole it ... I have had the Mich LTX m/s [and a/ts] on other vehicles [big Ford pickups] and really like them, but find the Conti DWS a fine tire for an X5. I had them in a similar size on a roadster [SLK] and they wore well on that demanding application [staggered, no rotation ....] Smooth, quiet ride for an all-weather, and reasonably priced, too.

I will eventually change my tires as well... mine are 20's on M-sport package. Too much noise. Tire Rack will definitely be my choice yet again :)

Thanks You had the LTX's on your E53? By the way, after this winter, it seems you guys in Atlanta might want to be prepped for snow too.

No, LTX on Ford Superduties. I don't think their sizes fit E53s [and certainly not the 18" wheels on mine ....]. I have only had the Conti DWS on my current E53 and, earlier, on a benz roadster [SLK] - Where I got a great deal on the DWS and figured I'd need [and did] a little snow/ice capability given where we used it.