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View Poll Results: What PSI are your tires at?
<35 PSI 0 0%
35-40 PSI 15 28.85%
41-45 PSI 18 34.62%
46-50 PSI 9 17.31%
>51 PSI 10 19.23%
Voters: 52. You may not vote on this poll

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Old 10-28-2019, 01:03 PM   #11 (permalink)
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51 front, 47 rear on my Bridgestone Ecopias, which have a max sidewall of 44 PSI.... I voted 46-50. I don’t plan on going higher.
Edge wear still slightly outpacing the center wear. I corner hard.

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Old 10-28-2019, 01:25 PM   #12 (permalink)
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I run max sidewall on the Volt but it's been so long since I've seen the car I can't remember what that psi is. I'm pretty sure they're Michelin ES though
The other day I couldn't even recall what the rims looked like and had to Google "2018 Volt" to remember
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Old 10-28-2019, 02:07 PM   #13 (permalink)
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Did you really own a Volt or just a (bad?) dream?
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Old 10-28-2019, 02:16 PM   #14 (permalink)
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It could be two or three more weeks to get it back. I guess it'll be like getting a new car at that point!
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Old 10-28-2019, 02:47 PM   #15 (permalink)
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If my tires are below 40, it feels like I'm driving through soup. But yeah, if I run over a dime, I know it.
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Old 10-29-2019, 04:26 AM   #16 (permalink)
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We used to run 45 psi in the rav4, but with the new "oversized" coopers the sweet spot seems to be around 36-38 psi. They have much stiffer sidewalls and are wider/taller, so they require less pressure to support the same weight. I could run them higher, but the ride would be horrible. It's already a stout ride. New hd coils in the rear and kyb shocks/struts all around. I love it. We have seen ~ 2mpg drop with the new tires, but they travel 6% more distance than the odometer reads, so it's all good. Currently averaging ~24 mpg since installing the new tires at 38 psi, compared to 26 mpg with the old ones at 45psi. The new tires are the very best we could find over the course of about 6 months of research. The rolling resistance on them seems to be about the same from 38-45 psi, so no need to make the ride harder with higher pressures. I have had tires that improved all the way to 60 psi, so these are definitely throwing me a curve ball with great performance at 38 psi. I run 80-100 psi in my truck when hauling, but that is only for carrying capacity/handling. The unloaded sweet spot is around 60/40.
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Old 10-29-2019, 09:51 AM   #17 (permalink)
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My mom runs 50 PSI on her Prius. I ran 68 PSI in my Civic. Currently running 80 PSI in my Insight. Wouldn't recommend over 60 PSI unless you're an extremist.

From what I've read/experienced, tire wear seems to be best at sidewall max, and >70 PSI accelerates wear slightly on tires. Not all cars show a MPG improvement past 60 PSI, so unless yours does don't run them past 60 PSI.
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Old 10-29-2019, 10:43 AM   #18 (permalink)
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Quote:
Originally Posted by Fat Charlie View Post
If my tires are below 40, it feels like I'm driving through soup. But yeah, if I run over a dime, I know it.
This.

I tend to check them when my car is feeling wallowy and sluggish, and thatís typically just under 40. I pump them up to 48-50.
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Old 10-29-2019, 07:12 PM   #19 (permalink)
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It seems that the consensus is that 40 PSI is a good minimum to start from. I am surprised to see an even distribution in the poll from 40 PSI.

I expect to see a really big mpg gain from these tires. I currently have 30 x 9.5 bf Goodrich tires at 35 PSI. I will be getting some A/S Michellin tires that are 235/75R15 and I will pump them up to 40 PSI. The nice thing about them is that they are more aerodynamic, 1/4 inch narrower and 29 inches tall
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Old 10-30-2019, 12:03 PM   #20 (permalink)
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Quote:
Originally Posted by Taylor95 View Post
Seems like 40 is a good starting point, and a lot of you guys go a lot higher with no issues. Thanks
Here is an old 2008 thread started by CapriRacer about Hyper-inflated tires. The thread ran till 2016 & has lots of info relevant to this thread:
https://ecomodder.com/forum/showthre...ires-2582.html


Last edited by litesong; 10-30-2019 at 01:03 PM..
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