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11-11-2012, 07:14 PM | #1 |
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Tire pressure of all-seasons
Hi all,
Just an FYI - when my FR-S came in, in early October, it came with all-season tires. When I was driving it the first few weeks the traction control was always chiming in and the back end was really squirrely. I thought it was the natural disposition of the car and was OK with that, but I thought it was more extreme than I was expecting. After a few weeks my folks came to visit and my mom's car had a TPMS light, so I checked her pressures and adjusted accordingly. I decided it was time to look at mine on the FR-S and I found that all of the tires were set to 40 psi! Well that explained a lot! I adjusted the pressures to 35 psi and the car is now perfect - even on the all-season tires. That will be rectified in the spring with some new wheels and 255 Star Specs, but I thought I'd let everyone know about my experience in case anyone else has experienced the same but didn't think to check tire pressures. I haven't mentioned it to the dealership, but I assume that they came that way from Japan since I got it immediately off the truck. Here's to more great driving weather! :happy0180: |
11-11-2012, 07:38 PM | #3 | |
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Quote:
Just a FYI, under normal driving conditions, it should be 35 psi when the tires are cold. |
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11-11-2012, 07:43 PM | #4 |
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Whats wrong with 40?
Recommended is 35. 40 wont make that much of a difference? |
11-11-2012, 07:50 PM | #5 |
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11-11-2012, 08:22 PM | #6 |
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As I said, 40 psi made the car overly touchy, with the traction control cutting in way too often.
I autocross a lot (really, a lot) and 5 psi makes a huge difference no matter what tire you're running. 5 psi too high on an all-season in the cold weather is asking for serious trouble. |
11-11-2012, 09:17 PM | #7 | |||
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Quote:
DON'T want this condition in a snow covered road situation,as your grip will improve if the tires are set at the lower (p.s.i.) (softer rubber compound) hence,the (all- season) designation. Quote:
Quote:
serious condition when driving on "snow-covered" roads. |
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11-11-2012, 09:32 PM | #8 |
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I was told in the past that they're over inflated for transportation purposes but yeah the dealer should set them right before you take delivery.
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11-12-2012, 12:49 AM | #9 |
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Air pressure gauge
A 5psi difference could simply be the diff between someone using an inexpensive gauge instead of an accurate digital one. If you intend to do any serious driving, invest in a good gauge and never assume.....
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