Largest Tire Size 5th Gen 4Runner

 In 4Runner Mods, 5th Gen 4Runner Mods

Biggest Tires on Stock 4Runner and 4Runner with Lift Kit

34" Toyo Open County AT 2 Tires (285/75R17)

What are the Biggest Tires you can run on 4Runner (Stock, Lift Kit, and Leveling Kit) – Largest Tire Size on 4Runner Explained

We have had a few questions on the biggest tires you can fit on your 4Runner. Asking this question on a forum might get you a few snarky comments, but it is welcomed over here. We got this question for the 10th+ time and figured we should probably write something about it.

If you are asking yourself what the largest tire you can fit on your stock 4Runner is, you will find it here. If you want to know what the largest tire size you can fit with a lift or leveling kit is, we are also going to be covering this.

This should serve as your complete guide to 4Runner tire size and wheel size. If you have any questions about tire size on your stock 4Runner, leveled 4Runner or lifted 4Runner, you are in a safe place. There are no forum trolls on this page waiting to bark at you for asking one of the most common questions in off-road history.

I had these question at one point as well:

  • How big can I go?
  • Do I want to go as large as possible?
  • What are the benefits of going bigger?
  • What are the downsides of going bigger?
  • At what point do I need a BMC (Body Mount Chop)
  • Should I keep my stock Wheels?
  • What is the best Wheel Size for Off-Road Use?
  • What are the best All-Terrain Tires?

The most common questions about 4Runner Tire Size:

  • Largest Size Tires on Stock 4Runner?
  • Largest Size Tires on 4Runner with Leveling Kit?
  • Largest Size Tires on 4Runner with Lift Kit?

17″ Wheel/Tire Options (Examples for Rubbing Vs. Non-Rubbing)

  • 265/70/17 (31″ – Stock 4Runner Size) (7-9″ Space Needed) – Won’t Rub
  • 255/75/17 (32.06″ – 6.5-8.5″ Space Needed) – Won’t Rub
  • 270/70/17 (32.16″ – 7-8.5″ Space Needed) – Won’t Rub
  • 285/70/17 (32.71″ – 7.5-9″ Space Needed) – Questionable (BMC Might be Needed)
  • 305/65/17 (32.61″ – 8.5-11″ Space Needed) – Will Rub – Adjustments/Mods Needed
  • 255/80/17 (33.06″ – 6.5-8.5″ Space Needed) – Will Rub – Adjustments/Mods Needed
  • 305/70/17 (33.81″ – 8-9.5″ Space Needed) – Will Rub – Adjustments/Mods Needed
  • 285/75/17 (33.83″ – 7.5-9.5″ Space Needed) – Will Rub – Adjustments/Mods Needed

18″ Wheel/Tire Options (Examples for Rubbing Vs. Non-Rubbing)

  • 265/65/18 (31.56″ – Close to Stock) (7.5-9.5″ Space Needed) – Won’t Rub
  • 275/65/18 (32.07″ – 7.5-9.5″ Space Needed) – Won’t Rub
  • 285/65/18 (32.59″ – 8-10″ Space Needed) – Questionable (BMC Might be Needed)
  • 295/65/18 (33.10″ – 8-10″ Space Needed) – Will Rub – Adjustments/Mods Needed

20″ Wheel/Tire Options (Examples for Rubbing Vs. Non-Rubbing)

  • 245/60/20 (31.57″ – Stock) (7-8.5″ Space Needed) – Won’t Rub
  • 275/55/20 (31.91″ – 7.5-9.5″ Space Needed) – Won’t Rub
  • 285/50/20 (32.22″ – 8-10″ Space Needed) – Questionable (BMC Might be Needed)
  • 285/55/20 (32.34″ – 8-10″ Space Needed) – Questionable (BMC Might be Needed)
  • 275/65/20 (32.99″ – 7.5-9.5″ Space Needed) – Will Rub – Adjustments/Mods Needed

The best resource out there for checking tire sizes and exact diameter measurements are tirerack.com and Tacomaworld.com (Tire Calculator). You can use both of these websites to check your tire size diameter and height and width to make sure the tire will clear your body mounts, fender liners, and 4Runner’s body.

You should always consult with these websites before you go larger on tires for your 4Runner. One of the most important aspects of buying new 5th Gen 4Runner wheels is the correct Width and Offset as well as Backspacing. If you do not do your research on Width, Offset and Backspacing, you will learn how to do a body mount chop (BMC) and trim multiple areas of your wheel well. 

When Choosing 5th Gen 4Runner Wheels (Specs):

  • Wheel Size, Style & Finish
  • Bolt Pattern (5th Gen = 6×139.7mm(5.5″) or 6×5.5)
  • Wheel Bore (5th Gen = 106mm)
  • Offset (-offset pushes wheel out. +offset pushes wheel into the wheel well)
  • Backspace (Similar to offset – the space between center tire and inside wheel)
  • Rating (Weight rating wheels were designed for)
  • Weight (lb)
  • Lug Type (tapered “conical” and radiused)
  • LipSize (in)

Stock wheel size on our 5th Gen 4Runner and with specs: 

  • The SR5 for dinner come stock with 17 x 7, 4.5″ backspace.
  • The TEP (Trail), the TRD Pro, and the TRD Off-Road come with 17 x 7 1/2 and a 4.875″ backspace.
  • The Limited Edition 4Runner comes with 20 x 7 with a 4.5″-inch backspace. 

Adding Wheel Spacers: When you go to add wheel spacers to your aftermarket tires, this actually may cause more rubbing than not. After we installed our icon stage two suspension kit, and through on our spider tracks wheel spacers, we had more rubbing than before. 

Largest Tire Size on 5th Gen 4Runner?

Stock 4Runner: The short answer is 32″. Our stock 4Runner has a 31″ tire. Making the jump to a 32″ tire should be fine on stock 4Runner. You want to make sure this is a smaller 32″ tire and not a larger 32″ tire. Some 32″ tires measure closer to 33″ tires.

For example, a 32.06 is basically a 32″ tire, while a 32.79 is closer to a 33″ tire. If you get a 32″ tire that is closer to 33″, you may end up doing a BMC and other modifications to ensure your tires will not rub.

Most 5th Gen 4Runner owners make the jump to a 33″ tire. Moving up to a 33″ tire requires a leveling kit or a lift kt. If you have a 3″ leveling kit in the front, then moving to a 33″ tire should be fine. Again, try not to get closer to a 34″ unless you want to do a BMC and other fender liner mods.

Largest Size Tires on 4Runner with Leveling Kit?

The largest tire size you can run on a 4Runner with a leveling kit is entirely up to you. With a 2″ leveling kit, you may still be stuck at 32″ without any modifications like a BMC.

If you move up to a 3″ leveling kit on your 4Runner, you should be totally fine to run 33″ without any modifications. Again, if you have a 33″ tire that is closer to a 34″, you may have to do a BMC and fender liner mods.

Largest Size Tires on 4Runner with Lift Kit?

Most 4Runner owners that have a lift kit are still at the same level of a leveling kit. The basic lift kit on a 4Runner is 3″-3.5″. 33″ tires are usually fine to run without any modifications, but it also depends on the exact measurements of your 33″ tires.

With 33″ tires, you still always run the risk of a BMC, fender liner mods and actually trimming off parts of your 4Runner body. We have 34″ tires on our 4Runner with a 3″ Icon Suspension lift kit. We had to do numerous modifications to our 4Runner.

With the 34″ tires, we had to chop our body mounts, push back our fender liners and port new holes for the screws, slice sections off our fender liners, slice sections off our rocker panel caps, and we had to cut new lines in our 4Runner’s body. It was a lot of work to get things to work.

Once you get your 34″ tires to comfortably fit inside your wheel well, wow. The results are amazing. Just make sure you have an adjustable suspension like the Icons, Toytec Boss, or KINGS so you have more flexibility in your adjustments.

Do I want to go as large as possible?

Not always. Going to biggest you can go will most likely mean that you need to cut your body mounts, trim your fender liners and cut into your 4Runner’s body. If that is something you are interested in doing, then, by all means, go all out. If we could have gone larger than 34″ tires, we would have.

What are the benefits of going big?

Having bigger tires allows you to clear more obstacles off-road. With larger tires on your 4Runner, you have more grip on all types of terrain. There is a huge difference between 33″ tires and 34″ tires when you are off-road. I have had 31″ tires, 33″ tires and 34″ tires and with 34″ tires, everything is so much easier.

What are the downsides of going big?

Gas mileage. When you make the jump to 34″ tires, you will see a serious decline in gas mileage. Even if you regear your 4Runner, you will still see a slight decrease in gas mileage with larger tires. The good happy-medium tire size is probably 33″. With 33″ tires, you can still trek just about anywhere you want off-road while still maintaining some decent MPGs.

At what point do I need a BMC (Body Mount Chop)

This all depends on what lift kit or leveling kit you have on your 4Runner. In most common cases, you will want to go with 33″ tires. With 33″ tires, you need a 3″ lift in order to avoid a BMC. If you only have a 2″ leveling kit with 33″ tires, you will likely need to do a BMC. With 34″ tires and a 3″ lift or leveling kit, you will need to do a BMC, trim your fender liners, push back your fender liners and cut into your 4Runner’s body. You may also need aftermarket UCAs (Upper Control Arms).

Should I keep my stock Wheels?

Always a good option. There is nothing wrong with keeping your stock wheels and making the jump to bigger tires. The stock 17″ 4Runner wheels are great for on-road and off-road use. Moving to an aftermarket wheel is only more expensive and often times, more confusing. If you are a first time 4Runner owner and not sure about aftermarket wheels, just grab a new set of larger tires and go experience what your 4Runner has to offer.

What is the best Wheel Size for Off-Road Use?

Typically, the smaller the wheel size, the better your off-road performance will be. When it comes to the 4Runner world, 17″ wheels are probably your go-to size. You want to stay away from 20″ wheels on your 4Runner if you plan on frequent off-road trips.

When it comes to a smaller wheel size, you can air down the tire pressure further than you can with a 20″ wheel. Having less air pressure in your tires means your tire will have more flotation and grip the terrain much easier than at full PSI. With less air pressure, the ride will be smoother and less bumpy, all while gripping the terrain much more efficiently.

What are the best All-Terrain Tires?

The section of copy came from another post we wrote on 5th Gen 4Runner Mods (Part 1).

$100-$200/ per tire (265/55r20)

A perfect range for anyone looking for a fresh set of all-terrain tires. Any worthwhile AT tire is going be in this range.

  1. Yokohama Geolandar A/T: $120 (Light tread depth)
  2. Firestone Destination A/T: $120-$150
  3. General Grabber A/T: $120-$170
  4. Nitto Terra Grapplers A/T: $150 – Top Choice
  5. Toyo Open Country A/T: $150
  6. Cooper Discoverer A/T: 150 (Bad Ass)

$200-$500/ per tire (265/55r20)

Stepping it up in this range of tires will get you some serious rubber, tread pattern options and tires that will push through anything you throw at them.

  1. BF Goodrich KO2 A/T: $250-$350
  2. Toyo Open Country A/T 2: $260
  3. Nitto Trail Grapplers A/T: $300
  4. Goodyear Duratrac A/T: $400+
  5. Cooper Discoverer STT Pro Off Road Tire A/T: $400+ – Top Choice
  6. Goodyear Wrangler Duratrac A/T: $400+

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Showing 2 comments
  • Jason
    Reply

    This dood has 35s with long travel kit.

    • Brenan - Trail4R
      Reply

      Jason,
      Yeah, nice set-up for sure. I need some 35s in my life. The 34s are getting a bit small for me these days.

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