Curious to know what folks are running for these. I have 275/70/18s and I feel like you can feel every pebble on the road at anything 36+ PSI. I just dropped to 31 PSI, feels much better, but also a bit concerned about how low that is.
Falken wildpeak A/T4W tire pressure
- Thread starter phantasticphil
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What was your OEM tire size and door PSI rating?
if it was 265/70R18 @ 33PSI, according to Tire Pressure Calculator, you should be running 42 PSI.
For reference, I that was my size and rating, and I run falken wildpeaks in LT265/70R18 E, and that calculator tells me to run at 45 PSI.
Love the Wildpeaks, they're more comfortable and capable than the OEM tires.
if it was 265/70R18 @ 33PSI, according to Tire Pressure Calculator, you should be running 42 PSI.
For reference, I that was my size and rating, and I run falken wildpeaks in LT265/70R18 E, and that calculator tells me to run at 45 PSI.
Love the Wildpeaks, they're more comfortable and capable than the OEM tires.
did you need load e? load e compound is usually a harder compound paired with a stiffer sidewall. tradeoff is that you get more durability for offroad conditions but less grip and more stiff for onroad conditions. if you dont do a lot of offroading you might get a more compliant onroad ride with sl load tires.
C
E is made for heavier vehicles
That's incorrect. Stiffness is designed for the weight of the vehicle. Falken and others make tires with reinforced sidewalls that are designed to flex approproately. Also, the tire compound is the primary deteminant of grip, especially when cold. Within a line the compound is the same.
E rated tires are usually designed to run at 50+ PSI. C rated tires are designed to run in the same PSI range as SL.
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I do off-road, nothing crazy though. Mainly forest exploration in the pnw. I didn't go with the 285/70/17 due to some of the brake clearance challenges I was reading about. Load E was the only option.
Do you guys think there's any risk with how low I'm currently running them? As I drive the psi will typically pick up to 34.
Do you guys think there's any risk with how low I'm currently running them? As I drive the psi will typically pick up to 34.
PSI recommendations are always for "cold" tires, with an expectation that the pressure will increase while being driven and tire heat up.
The issue with running them well below the recommended PSI is that will generate more flex in the sidewall while driving, and potentially wear out the tires faster.
As someone who's researched this in the past, I assure you'll find conflicting information on the Internet regarding just how important maintaining recommended pressure is, and what that actual recommended pressure should be.
In general though, tires with a "E" load range are designed to run at higher pressure than standard load or "SL" tires, which is what the number in the door placard references...at the very least, I would not run them lower than that (33 PSI, I believe). It's probably also safe be under the recommended PSI for the vehicle weight (which is probably closer to 45 PSI) to gain some ride comfort, but past that, I don't consider myself enough of an expert to actually suggest the specific pressure you should run
And yes, if you're running A/T tires with a "E" load range inflated properly, the ride probably will feel rougher than the stock tires...that's expected.
I have KO3s on mine and run at about 40 PSI, for example.
No need to guess - just check the load tables! For a load of 2100 lbs (which is equivalent to the OEM SL load tires), you'd be at 35 psi. If you want the details of how I arrived at 2100 lbs, then go to my prior post.
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- #11
Awesome thank you for this. I'll pump them up a bit and feel okay.
I have Falken WildPeak AT4Ws in 255/80R17 (E-Load). I run them at 39 psi, but don't feel like they ride significantly different than the OEM 20" wheels at 33 psi. I think park of the reason is because the the tires on the 20" rims are like rubber bands compared to the big sidewalls I have on the 17" rims. Overall, I'm very pleased with the WildPeaks.
I'm looking to get this exact tire. How do you find the wet performance and potential snow performance of the at4ws? Some reviews about them have spooked me.
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I live in the PNW, they do very well in the rain. I took some hard turns to try and get them to slip and it was difficult. Snow hasn't been tested thoroughly enough to have an informed opinion.
Oh awesome. I'm in the same climate, but across the border. Wet performance is imperative. Might just buy separate winters.
What size do you have them in and where were they made?
should be running 42 cold.
Should be running those at 46 psi cold according to the pressure calculator
if you find the e load is too stiff still, you can consider going 285/65/18. i run this size in sl load without issues.
Unless I'm figuring something wrong, I feel like 2100 lbs is a high load estimate... the GVRW listed for my 1958 is 6725 lbs, when divided by 4 = 1682 lbs, which was my starting point for reading load tables. Obviously there may be some differences between front and rear load (though I assumed it wasn't too great if the stock tires have the same recommended pressure), but unless you're overloaded or towing, I doubt either axle is loaded at 2100 lbs/tire for normal driving conditions.
I keep my tires inflated to 40 psi, which according to the charts has a max load of 1920 lbs... which I assume is adequate.
I not not an expert of this, however, and welcome anyone exposing any flaws in my logic...
