: What sidewall hieght with 265 PS2?



SLPR 6.0L
10-15-08, 11:05 PM
I have 255 PS2s with 20,000 miles on them and noticed a sidewall bulge. Will be driving the Riv until tires are replaced. I want more tire, what side wall is rec for 265 PS2s.
Anyone aware of any good deals
I tried a search and did not turn anything up

mbiker97
10-15-08, 11:24 PM
To match the stock tire circumference I would go with a 265/40-18. It's a little short, but not much. IIRC 265s rub in the front, especially on a lowered car. You really don't gain anything by going with a wider tyre though.


try this for calcing tyre size.

http://www.miata.net/garage/tirecalc.html

thebigjimsho
10-15-08, 11:29 PM
I have 255 PS2s with 20,000 miles on them and noticed a sidewall bulge. Will be driving the Riv until tires are replaced. I want more tire, what side wall is rec for 265 PS2s.
Anyone aware of any good deals
I tried a search and did not turn anything upJames at Lindsay Cadillac has 265/40 18 PS2s on stock wheels on his V. No problems from what I've heard...I personally run 245/45 18F and 275/40 18R PS2s...

jerrycecco
10-16-08, 12:07 AM
I bought PS2 265 about a month ago AFTER I personally talked with the Service Manager @ Lindsey Cadillac.
I ran open track event 2 weeks ago @ Eagles Canyon 1.5hrs north of Dallas, TX. Day was great and tires did well.
here's the link right after I bought the tires including pictures:
http://www.cadillacforums.com/forums/cadillac-cts-v-series-forum-2004/148571-new-ps2-tires-finally.html

trukk
10-16-08, 01:16 PM
I've ran 275/35 falken rt-615's on the stock 8.5" rims at the track, and had no rubbing problems up front.

The 275/35's a re smaller than stock. While they do leave a bit of a gap, I've had no negative affects with the computer/stabilitraq.

265/40's shouldn't be an issue.

-Chris

SLPR 6.0L
10-18-08, 03:58 AM
Thanks for the help. I ordered 265/40 PS2s. Great tire

Luna.
10-18-08, 10:18 PM
If my math is correct, the tire height of a 265/40 tire is 4.17" tall, a ~4% difference from stock. Keep that in mind when reading your speedo, as it won't be spot on (not that they are from the factory anyways, but...)

I'm with BigJim...unless you are going to run the same size all the way around (I thought there were some members that had rubbing issues running 265s all the way around, but I can't recall who...), 275/40 rear and 245/45 front is the combo to go, as it's nearly identical to the stock height (315/35 rear and 275/40 front would work awesome as well, if you could only get the cursed things to fit under the car...).

Also, keep in mind that a 265 on a 8.5" rim is pushing it. You may experience "roll-over" the rim. It was terrible for me running 275s, as a sharp turn-in swayed the car far more than I'd like it---and that was with run-flat tires, which have mega hard sidewalls.

SLPR 6.0L
10-19-08, 11:57 AM
If my math is correct, the tire height of a 265/40

Also, keep in mind that a 265 on a 8.5" rim is pushing it. You may experience "roll-over" the rim. It was terrible for me running 275s, as a sharp turn-in swayed the car far more than I'd like it---and that was with run-flat tires, which have mega hard sidewalls.

Roll over is my concern. It looks like the rim has plenty of room looking at my 255s. I have not noticed any roll over with the current 255s, hope the same is true for the 265s I ordered. Seems that I have read posts claiming that PS2 run on the small side. Not that it should make any difference but I have the twin spoke rims.
To the guys running 265s, what PSI do you run? Any abnornal wear issues? I got 21 to 22K out of the last set.