00 nbfrc

Less revs per mile=less miles on the odometer. From this chart about 22 less revs per mile with the bigger size. We are looking at a 225 60 18 for a replacement. It will probably last longer since it has a smaller footprint and less expensive.
Stock Tire - 235/55R18 >Search Tires Tire 1 - 255/55R18 >Search Tires
Section Width: 9.25 in 235 mm
Section Width: 10.03 in 255 mm

Rim Diameter: 18 in 457.2 mm
Rim Diameter: 18 in 457.2 mm

Rim Width Range: 6.5 - 8.5 in
Rim Width Range: 7 - 9 in

Overall Diameter: 28.17 in 715.51 mm
Overall Diameter: 29.04 in 737.61 mm

Sidewall Height: 5.08 in 129.03 mm
Sidewall Height: 5.52 in 140.20 mm

Radius: 14.08 in 357.63 mm
Radius: 14.52 in 368.80 mm

Circumference: 88.49 in 2247.6 mm
Circumference: 91.23 in 2317.2 mm

Revs per Mile: 738.3
Revs per Mile: 716.2

Actual Speed: 60 mph 100 km/h
Speedometer1: 58.2 mph 97.0 km/h

Speedometer Difference: - Speedometer Difference: 3.085% too slow
Diameter Difference: - Diameter Difference: 3%

mandyfig

Fantastic! So, if you took your car to the dealer, with a set of 255-55-18's they might say, you have voided the warranty....?? With the bigger tire, you are registering lower mileage.

VroomVroom

^ I just can't see that happening. For a 3% difference in miles...I wouldn't sweat it. I didn't see any on RX models, but my dealer...as well as many others...puts bigger rims and tires on new cars before they're even sold. By all means ask your dealer if it's a concern, but don't be surprised at the "Wha...whaa...what are you asking?!?" response.

On a whim I went tire "shopping" and was amazed at how many offerings there are in 255/55 vs. the OEM 235/55. Unless that changes I too will be putting 255's on when the stockers run thin.

mandyfig

You are right, they actually sell wheels that are not plus zero....yes there are many options when you hit 255-55....

shikbas

Hi,do you think that using the 255 instead of the oem 235 will fit proprly on the original 7 inches rim without thinning the sides of the tyre but not the center?

mandyfig

No issues. No performance or safety issues brought up.

username:

Old thread I know...but anyone running these? Need tires real soon.

00 nbfrc

https://www.clublexus.com/forums/rx-...55-18-a-8.html

My buddy went with the nexen 255/55/18s and has not had any issues with them. They are fine.

howdybob22

Had them when they first came out from tirerack. Risky at the time because there were no reviews on them, but I needed them badly due to my Crapty RS-A being dangerously worn out and the OEM size Alenza inventory ran out (from tirerack anyway). Took the plunge and 20K+ miles later still happy with them. They're awsome in the rain (Seattle) and did quite well during our last winter/ice storm. Mine are the 18" OEM ones.

kcvaun

After a lot of research I decided on the kuhmo apt kl51. Im very Picky about tires, the differences in tires of the same size can be astounding. I also have an off road only wrangler and a mitsu eclipse and go through alot of tires on both. I am however a bit nicer to my 330 but still will not compromise on tires. If there is anything Iv learned over the years its that price more often than not does not make for a good tire choice. There is a lot of crap out there at top dollar, and some VERY good tires overlooked due to a low cost. Im installing the kuhmos on wed and will keep all informed on the progress of results.

ecrane

these (Kumho Road Venture APT KL51) were on my wife's '07 RX350 we bought in Oct 2009. The dealer had them installed and they were new. We've presently have 8,000 miles on them and while she drives the car most of the time, they seem fine. We just took a 2,000 trip where I drove with no issues. They're fine in rain, they have worn well and have lots of tread left. You can sort the Tire Rack reviews for Lexus and you'll find a number of reviews rated them well. I'm a Michelin guy and at this point, I'd buy these again.

jeffls400

Another vote for the Kumho Road Venture APT KL51. They are superior in all respects to the Goodyear RSAs that came on the car from the factory. The original tires only lasted 27k miles. The Kumhos have 30k+ miles and based on the remaining tread, will last perhaps a total of 60k miles. They are reasonably quiet, have a smooth ride, and of course a competitive price point. Would definitely buy again.

Jeff

vj3

Have it since 11/07 the tire thread is still halfway. I tried this tire because of
it's thread life (not like like the OEM only lasted for 25K). Now I have 49K still
the tire is not showing any worn out very satisfied. About the ride I can say
is very good not totally excelent , noise depend on the surface of the road over all I'm satisfied will definitely use it again.

tbart16

sorry just joined the forum I am rollin the kumhos on my 330 they are worth every penny . I think they are just as good as the bridgestones. My wife used through this past Pa winter they perform great in the snow and the rain I would buy them again with out question. try discount tire .com I think that is where I got them

lexus114

I wouldnt recommend skimping out on tires,get a good/quality tire.