Agreed. I have e-rated Wildpeak AT's on my Tundra, and every fall when I switch over to my Toyo winters in SL, I'm amazed at how much quieter, smoother and more comfortable they are by comparison.
Land Cruiser Tire Upgrades?
- Thread starter JPATTERS
- Start date
Welcome to the asylum zgr8One.
Decided to look at the table again and with the new information about the load index on your tires (110 load index) compared to the OEM 20" tires (112 load index). I'm including a screen shot of the table from Falken. I think I accidently misquoted some of the values.
110 at 33 psi is 2182 lbs. (245/70R18 tires)
112 at 33 psi is 2315 lbs. (265/60R20 tires)
Since you're going from the 110 to a 116, here are the relevant values and psi that make sense based on the 110 at 33 psi:
116 at 27 psi is 2166 lbs (pretty close to the load for the 110 index)
116 at 28 psi is 2216 lbs
116 at 29 psi is 2304 lbs (pretty close to the load for the 112 index)
I double checked the load index on the 20" tires and the load index is 112. I think it's curious that Toyota would specify an inflation pressure to match two different loads. The conclusion remains the same - looks like 27-29 lbs is a good range of psi on your tires.
On my truck, I went from a 112 index on an SL tire to a 123 index on an E-load tire. That actually complicates things because the SL tires include an extra 10% load capacity that is not needed for the E-load tires. And, you use a different table for E-Load tires.
Yes, I’m realizing now that these load indexes and weight capacities are standardized and apply across brands. The calculator I used matched up exactly with the conclusions we came to from the charts and would work across tire load ratings as well.
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.
Yes, the Load Index must be standardized or we wouldn't be able to compare the ratings between brands. The difficulty comes when you change from one type of Load Index (SL) to a different one (E-Load for example). Manufacturers increase the load value on the SL tire for an SUV like a Land Cruiser when you use SL tires. As a result, the E-load tires I'm using on my LC have a lower rated load than the OEM SL tires.Yes, I’m realizing now that these load indexes and weight capacities are standardized and apply across brands. The calculator I used matched up exactly with the conclusions we came to from the charts and would work across tire load ratings as well.
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
BTW - You may know this already, but the tire you mounted is not approved by the manufacturer for a 7" rim. The range specified for the Nitto Terra Grappler G3 is 7.5" - 9.5".
Yeah, I knew this going in and the reason I ended up going for it is because there have been many people running 285s on 7 inch rims without real issues. A lot of people with 4runners and 7in wide stock wheels with positive data points.
I wanted an SL or C load tire around 33 inches on a 17 inch rim and the 285s offered the best selection. I liked the great wet weather performance of the terra grappler G3s and that they're pretty light for the size at 48 lbs.
If I moved down to ~32 inches, there were a couple other options I considered.
1. Toyo Open Country R/T Trail - 275/70R17 XL: This is only 42 lbs, but I ruled it out because the wet weather performance is likely relatively bad and it's not 3 peak rated.
2. Open Country A/T III LT255/75R17 C load: Same weight as the 285 terra grappler G3 at 48 lbs while being significantly smaller in height and width. Seems to be decent in wet weather but has some mixed reviews with some saying they get very slippery over time.
The closest runner up was Toyo Open Country AT III 34X10.50R17LT which is 33.5 inch in height, but it's D load and 55 lbs. A positive for these is that they're approved for my wheel width and offer increased ground clearance at almost an inch taller while possibly being similar in fuel economy with the decreased width that could offset the weight difference. I was mainly concerned that a D load would be too harsh of a ride for the vehicle weight compared to SL/C, and I don't think a full size spare would fit.
About these Toyo Open Country A/T III EV 275/70R18 (116) - 43lbs - 33.2'' according to their website.
I bought them on a Canadian online dealer and they where the same price as the LT E-rated (125) non-EV ones.
They look great and I am very happy with them. The ride is a bit firmer than the 265/70r18 oem. I'm currently at 35psi, I will try to drop them 1 or 2 psi to see the difference. I have to say they are very slightly noisier than the original Michelin but really not by much.
The great thing is that I barely notice a difference on the fuel consumption. Probably less than 0.5l/100km or 1mpg, witch is what I was looking for when I went with these EV tires.
Funny thing, this tire with the same product code 357280, has a different speed rating in US (on the .com website) than in Canada (on the .ca website).
In US they are rated 116T (118mph)
In Canada they are rated 116H (130mph)
???
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I can confirm three positive things about the 34 10.5 17 D rated toyo OC at3
1. It rides better than the stock size SL Toyo OC AT3’s I was running on the 18 inch rims
2. I get exactly the same gas mileage as before
3. The spare fits easily and tucks up in just as far as the OEM. (Nearly the same width as the 265.
I settled for n it after much research and After trying 4 different tires I am extremely happy with them.
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You know, you might've sold me on these. So they're similar over bumps and road imperfections compared to the SL? That's the main complaint I've heard for D and E load tires. What pressure are you running for them?
Instead of rebalancing the terra grappler G3s I have I may just be better off switching over to these. With my stock 245/70r18 tires
edit: after rebalancing and using 32 psi, I’m now getting highway mpg up to 23-24mpg with the 285 nittos, which is pretty close to the stock
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I don’t perceive any ride difference from the SL 265 AT3. I am currently running 35 PSI. MPG with both the 265 and 34 10.5 is 18.7. I ran the 265’s for about 3.5k miles, and have had the 34’s for about 1.2kmiles. I’m not a contentious gas saving driver.
On stock suspension, or lifted ??
Looks good!
Don't forget to get some proper under carriage protection.
I just picked up some 2024 TRD Offroad Tacoma wheels that are a +55 offset a little bit wider than the stock FE wheel but 17" diameter as well. I'm planning on going with the 285/70R17 tire but don't know if I'm going to go SL load range or C. What is the load range on these Falkens in your photo?
@uraniumrich maybe you can help me with this. Just swapped out my OEM 18's w/Michelins (265/70/18 SL116) for Method 703's with Toyo AT3's in SL (P285/70/17 SL117). According to the door placard on my LC LC (premium) the pressures on the OEM SL Michelins should be 33psi. In reality they were aired up to 36/37 from the dealer. Using the Tire Pressure Calculator the recommended pressure for the AT3's in this case is 28psi. The Toyo's came aired up to 36/37 from the tire shop. I was going to air them down to 33psi to soften the ride. The calculator does have a note that 28psi may be too low. Any thoughts on what pressures I should run?
I think C rated is the right balance for street comfort and off road durability for this vehicle. Unfortunately C is not one of the most common type available.
I place a lot of value in good sidewall protection, but not highly stiff sidewall. E rated tires are designed for heavier vehicles
I place a lot of value in good sidewall protection, but not highly stiff sidewall. E rated tires are designed for heavier vehicles
Since these are SL tires, the inflation pressure is based on the load index. GIven that the difference between 116 & 117 is negligible, I'd probably run 32 psi based on the Load Inflation Tables. The change in tire size would be important if you had gone to an LT, but isn't a factor for SL tires. But, the best way to ensure proper treadwear would be to do a chalk test. Although the online Tire Pressure Calculator is a nice tool, I'm always leery of the black box that just spits out an answer. That's why I stick to using the ETRTO standardized tables used across the industry.
And, how about a pic of the new wheels on your rig? You can't just flex on us that you leveled up and not share a nice shot!
As requested, it's been raining for days so forgive the dirt. I think it's the perfect look for the truck. The amount of sidewall just really looks right. I was tempted to grab a pic of the front with the jack still under it, had that level'd out/lifted look... looked really good. I asked for a million pics of the poke before purchasing, so here's some of the poke too (very minimal). I went with a full size spare as well, no fitment issues. Next up bigger mud flaps, and a chin tuck.
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These are the 285/70R17 SL load, correct?
Correct
