PLEASE Check Tire Pressure

[Larry Macedo]

Just a friendly reminder to everyone about something that can be very dangerous. We check every Car and Truck that enter our doors and have found that 2/3 are 5-10 psi lower than prescibed. Thanks!

 

[95Viper]

28lbs on Pilots for our Vipers, right?

 

[CitySnake]

28lbs on Pilots for our Vipers, right?

29.

 

[snampro]

manual/sticker say 35, are you guys really running 29?

 

[GT40DOC]

My manual says 29. The tires seems to be wearing perfect for wide tires.

 

[carguy07]

manual/sticker say 35, are you guys really running 29?

Mine says 35 too. I switched to 29-30 and it rides much better. 35 is the highest I have ever seen for a passenger car. Almost wonder if it is a typo.

 

[snampro]

huh, I just checked my drivers door and manual and they both say 35PSI, so that's what I've been running...

I wonder if the 35 was for the original tires and they updated it when they started fitting Pilot Sports, which is what I'm currently running (on stock 3-spoke rims)

Someone please advise as to why these are different???

 

[Falconeer]

My door sticker says 30 psi

 

[snampro]

well, I guess I'll start running 30psi...that's why I'm on here, thanks guys...

 

[zoomie]

My door sticker reads 29 PSI.

 

[snampro]

does the 17 or 18 inch wheel make a difference? I can't see how it would...

 

[Dimitrios]

does 29psi also include 19" hre wheels or is it just for the stock 18"?

 

[Simi Viper]

does 29psi also include 19" hre wheels or is it just for the stock 18"?

Yes 29psi according to HRE sales rep, every spec are the same as factory.

 

[snampro]

so when and why did dodge change from 35psi (like on my car) to 29 or 30 psi?

 

[v10kingsnake]

maybe when the technology updated

 

[Inferno]

any suggestions for pirelli p-zero's?

 

[Leslie]

my door sticker says 29

I know most cars offer a lower psi for optimal performance driving and a higher psi for a "smoother" cadillac ride

 

[Chuck 98 RT/10]

Forget the door sticker, check the tire stamp. The Michelins I've seen are stamped with 29psi. Yours may vary.

 

[Larry Macedo]

I would run no less than 29 psi on the street. Obviously racing would make a difference and people run from 22 -40psi depending on the situation. Lower tire pressure to hook on launch, add pressure for high speed.

 

[GR8_ASP]

I ran 32 psi with the original XGTZ for a Gen I and reduced it to 28-29 with Pilot Sports. No idea why the sticker would say 35 psi. I now run 31-32 psi with run craps.

 

[ACR steve]

29psi cold is the best at 35psi the car feels like its skating

 

[snampro]

29psi cold is the best at 35psi the car feels like its skating

huh, now that's funny, and I just thought it was just because that's how a Viper handled...

 

[Jeff-00-ACR]

I took mine out for the first time after it had cooled down here and noticed one tire very low. Checked it and it had 10 lbs while the other 3 were about 25. Put in 30 all around and have been watching the one that was low and it is holding fine. Weird.

 

[Inferno]

My Pirelli's are stamped 50psi, isn't that kinda high?

 

[snampro]

50 is the max it can be inflated to, not the recommended inflation pressure

 

[DrumrBoy]

Same deal here. All hold 31 except for left front. Sometimes it holds for pressure for three weeks and then suddenly goes to 20. Sometimes it drops to 20 in a day. Some kinda voodoo hex I'm thinkin'.

 

[Steve-Indy]

snampro...hope that the following info helps:

From the 1995 Viper Owner's Manual...(for Michelin Pilot XGT Z4 that were the OEM tires)....35 lbs is the stated cold tire inflation pressure.

In 1996 BOTH the Gen I RT/10's and the Gen II GTS's were shod with Pilot SX Mxx3's...with a recommended cold tire inflation pressure of 29 lbs....and these tires were used on Vipers thru 1998, with the exception of the 100 GT2's (1998) which had the new Pilot Sport's.

1999-2002...Pilot Sport's...with a recommended cold tire inflation pressure of 29 lbs.

Gen III's...Pilot Sport Zero Pressure ("run-flats")...with a recommended cold tire inflation pressure of 29 lbs.

 

[snampro]

thanks for the info steve.

the only other thing I notice is that when they changed to pilot sports in '99 they also went from 17" to 18" rims, but that should have no effect on the necessary tire pressure...

 

[Steve-Indy]

CORRECTION: I was WRONG about the 1998 GT 2 tires in the above post...I checked via Maurice Liang's book " Viper Buyer's Guide"...they were Michelin Pilot SX tires (NOT "Pilot Sports") but with a slightly lower aspect ratio nunber due to the step-up to 18" wheels.

Sorry !

 

[94RT10Ohio]

thanks for the info steve.

the only other thing I notice is that when they changed to pilot sports in '99 they also went from 17" to 18" rims, but that should have no effect on the necessary tire pressure...

Tire pressure can change based on different tire sizes (profile). The 18" tires, if I am not mistaken, have a lower profile than the 17s.