View Poll Results: How much air do you guys put in your OEM 17" wheels/tires?
Below 32 psi (please specify your reason)
1
0.67%
32 psi (what Lexus recommends)
49
32.67%
33 - 34 psi (please specify your reason)
26
17.33%
35 - 36 psi (please specify your reason)
43
28.67%
37 - 38 psi (please specify your reason)
9
6.00%
39 - 40 psi (please specify your reason)
15
10.00%
Over 40psi (please specify your reason)
7
4.67%
Voters: 150. You may not vote on this poll
All GS owners with OEM 17s please report in
11-24-05, 01:52 PM
#31
Pole Position
Join Date: Aug 2004
Location: California
Posts: 389
Likes: 0
Received 0 Likes
on
0 Posts
I used to have them at 35 psi, but now am closer to 40 psi due to the recommendation by Custom Alignment (based on the wear on the old tires). Old tire=Potenza RE730, new tires=F1 GS-D3's. 
11-24-05, 04:22 PM
#32
Lexus Champion
40psi.
Originally Posted by JyGS430
I used to have them at 35 psi, but now am closer to 40 psi due to the recommendation by Custom Alignment (based on the wear on the old tires). Old tire=Potenza RE730, new tires=F1 GS-D3's.
I thought my 36 psi was running it high. How is the ride quality? Any tire noise?
11-25-05, 08:05 AM
#33
Lexus Test Driver
I have been running 36 but the tires seem a bit low at that pressure. Now that I know some folks are running up to 40, I may try that and see how it feels.
11-25-05, 09:41 AM
#34
Pole Position
Join Date: Aug 2004
Location: California
Posts: 389
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by TAMR_GUS98
Dude,
I thought my 36 psi was running it high. How is the ride quality? Any tire noise?
I thought my 36 psi was running it high. How is the ride quality? Any tire noise?
Yeah I too had my doubts about going so high, but since Steve? (I think that was his name) at Custom suggested it I went with it. The ride is not harsh at all, but I think that might be because of the tire. The Goodyears do seem to have softer sidewalls compared w/ the Bridgestones.
James
11-26-05, 09:54 AM
#35
Driver
Join Date: Aug 2005
Location: wa
Posts: 156
Likes: 0
Received 0 Likes
on
0 Posts
I am running Toyo Proxes and the tire manufacturer has recomended 40psi. If u go by the lexus it shouls be 33psi, the tire wear will be alot faster that is what I am told by Les Schwab Tires.
11-28-05, 12:38 PM
#36
Driver
Join Date: Jun 2005
Location: MA
Posts: 136
Likes: 0
Received 0 Likes
on
0 Posts
40+ PSI all around. Anything less, and the car starts to hunt on rutted roads due to bushing flex.
Actually running snow tires right now on 16" rims with only 26PSI, and it feels fantastic. Don't know why lexus ever put 17" rims on the car; appearance perhaps?
-pavel.
2002 GS430
L-Tuned S/S
Daizen sways
Actually running snow tires right now on 16" rims with only 26PSI, and it feels fantastic. Don't know why lexus ever put 17" rims on the car; appearance perhaps?
-pavel.
2002 GS430
L-Tuned S/S
Daizen sways
11-28-05, 08:49 PM
#37
Originally Posted by pavster
Actually running snow tires right now on 16" rims with only 26PSI, and it feels fantastic. Don't know why lexus ever put 17" rims on the car; appearance perhaps?
By the way, lately when I'm running my 17s, I try to keep them at 32 psi or lower. Anything higher than that and the ride feels way too harsh for my liking.
07-02-07, 04:22 PM
#38
Pole Position
Join Date: Dec 2002
Location: NE
Posts: 297
Likes: 0
Received 0 Likes
on
0 Posts
Running 40 PSI now that all four tires have uneven wear on inside/outside from running 32 PSI. Funny, had these on the SC400 and no problems. Switched them over to my GS430 and got uneven wear on 32 PSI.
07-03-07, 03:25 AM
#40
For all those running 40psi+ on stock tires...put them back to the specified door jam psi!! Not only does over inflation kill your ride quality but you'll wear out the center of the tire 10X faster. And vice versa, running extremely LOW pressure will wear your shoulders...
I think everyone on here can agree that every car out there has a different suspension setup, weight distribution, etc. The reason mfg's put the recommended psi on the door is so you can follow it. Obvisoulsy messing around with the suspension, or putting big wheels on, you can raise A FEW psi, but going into the high 30's or even 40's on a passenger car is not worth it.
And depending on the wear patterns you have ( i'd have to see it ) I'd recommend rechecking the alignment at places that can perform a 4-wheel one. I know for a fact front and rear toe is adjustable on our cars...I can't remember if caster/camber is adjustable in the rear though. Also, rotations every 4-5,000 miles will also help in wear.....
Never go by what a tire LOOKS like....check/set air pressure's ONLY after the vehicle has been sitting for a few hours and the tire's are cold.
AND FINALLY...NEVER go by what the tire itself says!! That is the MAXIMUM PSI the tire can hold!! You'll BURN through tires doing that, as well as risk causing a blowout when the tires heat up and pressure inside increases...
I work at a tire company, so if people have questions, just let me know
I think everyone on here can agree that every car out there has a different suspension setup, weight distribution, etc. The reason mfg's put the recommended psi on the door is so you can follow it. Obvisoulsy messing around with the suspension, or putting big wheels on, you can raise A FEW psi, but going into the high 30's or even 40's on a passenger car is not worth it.
And depending on the wear patterns you have ( i'd have to see it ) I'd recommend rechecking the alignment at places that can perform a 4-wheel one. I know for a fact front and rear toe is adjustable on our cars...I can't remember if caster/camber is adjustable in the rear though. Also, rotations every 4-5,000 miles will also help in wear.....
Never go by what a tire LOOKS like....check/set air pressure's ONLY after the vehicle has been sitting for a few hours and the tire's are cold.
AND FINALLY...NEVER go by what the tire itself says!! That is the MAXIMUM PSI the tire can hold!! You'll BURN through tires doing that, as well as risk causing a blowout when the tires heat up and pressure inside increases...
I work at a tire company, so if people have questions, just let me know
07-03-07, 07:41 AM
#41
Rookie
Join Date: Mar 2007
Location: Ohio
Posts: 96
Likes: 0
Received 0 Likes
on
0 Posts
Okay, I just did this. I checked my tires and well....front's were @ 50 psi (no wonder it rode a little rough). I made them 33 all the way around and am getting ready to take a trip. I'll let you know my mpg when I get back. Before I was around 24mpg on a 4 hour trip. I can tell a difference in the ride already with the 1/2 mile I just drove. Hopefully I don't lose any mpg.
My sticker on my 98 GS 400 actually says 33 psi.
My sticker on my 98 GS 400 actually says 33 psi.
Last edited by LexusVRGN; 07-03-07 at 07:42 AM. Reason: Reason for 33 mpg
07-03-07, 07:44 AM
#42
Rookie
Join Date: Mar 2007
Location: Ohio
Posts: 96
Likes: 0
Received 0 Likes
on
0 Posts
For all those running 40psi+ on stock tires...put them back to the specified door jam psi!! Not only does over inflation kill your ride quality but you'll wear out the center of the tire 10X faster. And vice versa, running extremely LOW pressure will wear your shoulders...
I think everyone on here can agree that every car out there has a different suspension setup, weight distribution, etc. The reason mfg's put the recommended psi on the door is so you can follow it. Obvisoulsy messing around with the suspension, or putting big wheels on, you can raise A FEW psi, but going into the high 30's or even 40's on a passenger car is not worth it.
And depending on the wear patterns you have ( i'd have to see it ) I'd recommend rechecking the alignment at places that can perform a 4-wheel one. I know for a fact front and rear toe is adjustable on our cars...I can't remember if caster/camber is adjustable in the rear though. Also, rotations every 4-5,000 miles will also help in wear.....
Never go by what a tire LOOKS like....check/set air pressure's ONLY after the vehicle has been sitting for a few hours and the tire's are cold.
AND FINALLY...NEVER go by what the tire itself says!! That is the MAXIMUM PSI the tire can hold!! You'll BURN through tires doing that, as well as risk causing a blowout when the tires heat up and pressure inside increases...
I work at a tire company, so if people have questions, just let me know
I think everyone on here can agree that every car out there has a different suspension setup, weight distribution, etc. The reason mfg's put the recommended psi on the door is so you can follow it. Obvisoulsy messing around with the suspension, or putting big wheels on, you can raise A FEW psi, but going into the high 30's or even 40's on a passenger car is not worth it.
And depending on the wear patterns you have ( i'd have to see it ) I'd recommend rechecking the alignment at places that can perform a 4-wheel one. I know for a fact front and rear toe is adjustable on our cars...I can't remember if caster/camber is adjustable in the rear though. Also, rotations every 4-5,000 miles will also help in wear.....
Never go by what a tire LOOKS like....check/set air pressure's ONLY after the vehicle has been sitting for a few hours and the tire's are cold.
AND FINALLY...NEVER go by what the tire itself says!! That is the MAXIMUM PSI the tire can hold!! You'll BURN through tires doing that, as well as risk causing a blowout when the tires heat up and pressure inside increases...
I work at a tire company, so if people have questions, just let me know
07-03-07, 07:59 AM
#43
Lexus Fanatic
Okay, I just did this. I checked my tires and well....front's were @ 50 psi (no wonder it rode a little rough). I made them 33 all the way around and am getting ready to take a trip. I'll let you know my mpg when I get back. Before I was around 24mpg on a 4 hour trip. I can tell a difference in the ride already with the 1/2 mile I just drove. Hopefully I don't lose any mpg.
My sticker on my 98 GS 400 actually says 33 psi.
My sticker on my 98 GS 400 actually says 33 psi.
I run my stock 16s at 34psi cold and my oem 18s at 36psi cold.
