Ah i think you're right. Should've cross referenced that number with another website. Thanks!
200 Series Tire and Wheel Size Database (20 Viewers)
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That site is incorrect for my wheels. By a lot.
I could use some help with RCTIP for my new tires. Running Toyo LT 285/70/17 E (121/118S). Running 40 PSI today...
gaijin
GOLD Star
Gaijin...appreciate the confirmation. I thought they could be a bit under-inflated at 40psi as I expected these E tires to ride a lot firmer. Don't get me wrong...the ride is definitely firmer than my previous Toyo AT III in 285/60/18 XL, but love the stability. Thanks again!
There's easily enough load margin that you could run at 35psi. Though something in between 35-40PSI will probably strike the best ride and handling balance for your preference.
Its a heavy burden to carry, but someone must carry it.
And I tow a 3500# trailer off-road…we will see how it does at 40psi.
I run that same tire in a C anywhere from 36 for harsh city roads, to 40 for long highway trips intrastate. Usually staying around 38 after my preload setup.
Really above 40 ride quality and traction fall off a cliff. I wouldn’t ever drive it in rain at 40 either in any spirited fashion. Dramatic changes above 40.
Put 295/70R17's on rock warriors today on my 2015 LX.
Had to delete the front mudflaps and will get out the heat gun for some very slight reforming of the front fender liner but that's it as there is only tiny bit of rub at full turn.
Could I get an RCTIP for this setup?
Had to delete the front mudflaps and will get out the heat gun for some very slight reforming of the front fender liner but that's it as there is only tiny bit of rub at full turn.
gaijin
GOLD Star
No worries.
The RCTIP for those LT295/70R17 tires on your LX570 is 35psi F/R.
HTH
gaijin
GOLD Star
Are you referencing a different specification source than what @gaijin has access to? Can you please elaborate what source that is so that I can better understand your recommendation? Thank you!
LOL that is hilarious, sorry man I don't mean to be rude since you don't know the background but he has no access to anything special or any insight you don't.
Tire Pressure Calculator
Easy to use tire pressure calculator. Use our tire pressure calculator to calculate the new tire pressure needed when changing tire sizes.
For the tire you are running the absolute bare minimum is 32 PSI, but since its a P for P, your door jamb is the real minimum.
I don't know where you think an internet stranger is qualified to give you life threatening advice, but as another internet stranger I'm telling you that whatever the recommendation was that I cant see (its blocked) is dangerous and incompetent.
gaijin
GOLD Star
I can't see the post you are responding to (they have blocked me), but for the record, I use information and procedures stipulated by the Tire & Rim Association of America (TRA) - the body that specifies manufacturing specifications for the performance of automobile tires.
Toyo Tires have published an excellent monograph on the subject of determining tire pressures for non-standard tire types and sizes which includes some of the Load/Inflation tables published by the TRA. Anyone can access this publication here: Guidelines for the Application of Load and Inflation Tables
There is a lot of good general tire info in that Toyo publication as well - happy reading.
HTH
Trying to avoid being that guy that asks questions that have been answered a million times, but I'm not finding an actual link to the wheel/tire database......what am I missing?
Thanks for replying... it made me recheck and realize I made a mistake on my original post. Down the rabbit hole I went.
Thats a good place to start, but YMMV. It does not list all load ratings either for example.Tire Pressure Calculator
Easy to use tire pressure calculator. Use our tire pressure calculator to calculate the new tire pressure needed when changing tire sizes.tiresize.com
For the tire you are running the absolute bare minimum is 32 PSI, but since its a P for P, your door jamb is the real minimum.
I don't know where you think an internet stranger is qualified to give you life threatening advice, but as another internet stranger I'm telling you that whatever the recommendation was that I cant see (its blocked) is dangerous and incompetent.
The OEM tires on my LC200 are actually Metric 285/60R18, not P Metric P285/60R18. My mistake. So instead of swapping P for P, it is swapping Metric for P.
The door jamb on my LC200 specifies 33psi cold inflation on the factory 285/60R18 Dunlop Grandtrek AT23's (Load index 116, 2756lbs max load). Found this on tirepressure.org (Dunlop Grandtrek AT23 Tire Pressure Chart - https://tirepressure.org/dunlop/grandtrek-at23):
| Tire Size | Load Index | Load Range | 26 psi | 27 psi | 28 psi | 29 psi | 30 psi | 31 psi | 32 psi | 33 psi | 34 psi | 35 psi | 36 psi | 37 psi | 38 psi | 39 psi | 40 psi | 41 psi | 42 psi | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 285/60R18 116 SL | 116 | SL | 2116 lbs | 2183 lbs | 2216 lbs | 2304 lbs | 2392 lbs | 2425 lbs | 2491 lbs | 2579 lbs | 2623 lbs | 2668 lbs | 2756 lbs |
Here is what I found for the Yokohamas I am considering (Geolandar G015 P285/70 R17) with a 117T load index on the same site:
| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
So from those specs (assuming they are accurate), I am looking to match the load rating of 2579lbs at 33psi on my OEM tires with something from the Yokohama chart above. The tirepressure.org numbers are saying 28psi / 2575lbs.
Plugging those numbers into the Tire-Size calculator link you gave also recommends the same 28psi / 2575lbs.
I am still curious where you obtained the 32psi minimum in your original recommendation where you were basing your numbers on my error stating a P metric OEM? Not trying to be rude, just asking if your info comes from Yokohama, personal experience, or another verifiable source?
