petersu33

I have a 250 AWD with 18x8, 225/40r18 all around. I just swap the tires from Pirelli P zero to Continental Extreme Contact DWS06. You wouldn't believe how much ride comfort they improved. It feels like I'm running on 17" now, which is awesome! DWS06 are not as sticky as P zero, but the ride quality is night and day.

flowrider

iTrader: (9)

No, you DO NOT. A 225/40/18 tire will work just fine on an 8½" wide wheel. The tire manufacturers recommend wheel width for a 225/40/18 tire is 7½ -9".

And the OP has never mentioned if his wheels are staggered or not

Lou

Zmon

iTrader: (2)

If they're the stock 18's, it's obviously recommended to run the staggered setup. I guess I should of clarified. I understand the lure of having a setup you can rotate, but why bother unless they're going to be winter tires? If the OP does care about the car drives, I recall Jeff Lange mentioning that VDIM was a bit more aggressive on cars with square setups, but that most likely does not matter for the average driver who isn't going to push the car.

It seems I'm not too up to date with my tire info, but yes, Lou is right, 225/40r18 should fit all around. I stand corrected. I'd still be a bit concerned due to the different offsets (+45 vs +50) if they are the stock rims, may need spacers in the rear if OP plans on rotating the fronts to the back and vice versa. I'd need to research that though to be sure.

SS1990

I’m keeping the staggered setup (225/40/18 and 255/40/18). For me, it strictly comes down to comfort and road noise.

Should I go with the Michelin Pilot AS 3+ or Continental ExtremeContact DWS06 tires???

The car will be based in Michigan (hot dry summers & cold snowy winters).

Thanks again for the help!!!

SS1990

To add to my last post, thoughts on me comprising the staggered setup and splitting the difference with 235-40-18 all the way around? That way I can rotate the tires. As the CL members have called out, the rear wheels are supposedly larger than the fronts though...

primavera

You won't know how wide your wheels are until you take them off the car and look inside for stamping. If all 4 wheels are the same width you can easily go with 235-40-18 on all 4 corners.
If you want summer and winter tires Continental DWS 06 (DWS = Dry Wet Snow) are your best bet, they are fantastic tires! Read some reviews online, watch YouTube videos. Hope that helps.

flowrider

iTrader: (9)

If in fact your wheels are staggered, the offset is different. +45mm in front and +50mm in back. with the rears in front, they may look a bit sunken in. I believe the clearance should be OK.

My experience with Continental tires, The Extreme Contact DW was a disaster. The people at Continental were extremely rude and offered me no help. Thank goodness for Discount Tire I will NEVER buy Continentals again.

And to find out your rim widths, they should be stamped on the inner edge of the wheel and visible with the tire mounted. Just remove one of the rears and look.

Lou

primavera

I run 18 x 8,5" wide ISP Mode wheels with 225 40 18 on all four corners on my RWD with no problems. I can rotate them any way I want. I like the quiet and comfortable Pirelli P7, the only regret I have I should've went with 235 40 18. I have dedicated snow wheels and tires for winter driving.
Yes for snowy Michigan I would definitely go for DWS06

https://www.clublexus.com/forums/is-...ml#post9935682

SS1990

Your 18" wheels are different than mine... I have the OEM Lexus wheels (photo attached).

SS1990

I just confirmed my wheel sizes:
Front: 18" x 8" with 45mm offset
Rear: 18" x 8.5" with 50mm offset

Based on Michigan driving conditions (hot dry summers, cold snowy winters), I'm going to go with the Continental Extreme Contact DWS 06 tires.

With this information, can I safely get away with using 225 or 235 /40/R18 tires all the way around so that I can rotate them? Or, do you recommend that I stick with 225 in the front and 255 in the rear?

Thanks everyone!!!

primavera

I would find out first if DWS are directional tires, meaning they can rotate only one way.

Use this tire calculator https://tiresize.com/calculator/ (click on Tire Comparison) to see huge difference in overall diameter between 225 40 and 255 40. I have no idea why Lexus went with staggered wheels on gutless IS250 lol
I would use 235 on all 4 wheels. You can rotate them without having your car looking weird, the only difference is if you install 8,5" on front and 8" on rear that wider wheel will stick out 1cm more than 8". Such a small difference no one will be able to tell. You could also get 20mm or 25mm spacers to fill that extra gap when using 8" wheel on the back.

sktn77a

iTrader: (2)

DWS are assymetric but not directional. However, I wouldn't want to rotate the stretched 225s on 8.5" wheels to the front and 225s on an 8" wheels to the rear. You just dont put wider wheels on the front and skinnys on the rear!

SS1990

Thanks for everyone's input! I placed an order for the Continental Extreme Contact DWS 06; 225/40/18 in the front and 255/40/18 in the rears. I'll provide feedback once I have them installed. Optimisitc that I'm going to experience a smoother and more quiet ride than the current Chinese tires that I have on the car!

SS1990

For those wondering, I purchased the car used from a private seller who put 4 Rydanz Roadster R02 tires (225/40R18/92W on all 4 squared).

These are the tires that I'm discarding for the Continental Extreme Contact DWS 06. They can be purchased at Walmart for $68.50 per tire...

https://www.walmart.com/ip/Rydanz-RO...8-92W/52292475

SS1990

I had the Continental Extreme Contact DWS 06; 225/40/18 in the front and 255/40/18 in the rears installed today. The car drives significantly better!

Question - what is the minimum tire pressure (PSI) that I can safely use? I'd like to use towards the minimum in order to achieve the smoothest/most cushioned ride.