Largest Tire Size on 5th Gen 4Runner
Biggest Tires on Stock 4Runner and 4Runner with Lift Kit
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, leveled, 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 Tire Size:
- Largest Size Tires on Stock 4Runner?
- Largest Size Tires with Leveling Kit?
- Largest Size Tires with Lift Kit?
17″ Wheel/Tire Options (Examples for Rubbing Vs. Non-Rubbing)
- 265/70/17 (31.61″ – Stock 4Runner Size) (7-9″ Space Needed) – Won’t Rub
- 255/75/17 (32.06″ – 6.5-8.5″ Space Needed) – Won’t Rub
- 275/70/17 (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 body.
You should always consult with these websites before you go larger on tires. One of the most important aspects of buying new 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 and trim multiple areas of your wheel well.
How to Check Tire Size and Wheel Size Fitment (Serious Buying Question)
If you are looking to figure out if a wheel fits a tire size, head over to ToyoTires.com. They have a really good “recommended” wheel size for whatever tire size you enter. Go to ToyoTires.com and enter in your tire size. From there, Toyo will give a list of their tires. Select a tire that you have or are considering and then you will see a section labeled “APPROVED RIM WIDTH RANGE (IN.)”.
This will give you a range of wheel sizes that are compatible with the tire size you enter. From there, you see what wheel sizes will fit that tire. If you do not see your wheel size there, that doesn’t mean it won’t fit. It just means that it is not “recommended”. What does this mean? Maybe the tire company will not warranty the tire if some type of defect occurs. In any case, call your local tire shop for details on this one.
When Choosing Wheels (Specs):
- Bolt Pattern (5th Gen = 6×139.7mm(5.5″) or 6×5.5)
- Wheel Bore (5th Gen = 106mm)
- Offset (-offset pushes the 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)
Note: If I were to buy a wheel, I would buy a wheel with at least a -6 offset or higher. Maybe a -10 or higher offset. This is going to push your wheel out of your well which may eliminate the need for wheel spacers, but not always. Those other specs come into play as well.
Stock wheel size on our 5th Gen
- The SR5 comes 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 comes with 20 x 7 with a 4.5″-inch backspace.
Adding Wheel Spacers: When you go to add wheel spacers, this actually may cause more rubbing than before. After we installed our icon stage two suspension kit and threw on our spider tracks wheel spacers, we had more rubbing than before.
Largest Tire Size on 5th Gen 4Runner?
The short answer is 32″. Our stock 4Runner has a 31″ tire (265/70/17 – 31.61″). Making the jump to a 32″ tire should be fine on stock suspension. 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 without a leveling kit. If you want a larger tire, you should really look into a leveling kit or lift kit, though.
Most 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, but there are 33″ tires that will rub with a leveling kit as well. With 33″ tires and a 3″ leveling kit, you will probably have some rubbing on the fender liners. If you are trying to avoid trimming fender liners, BMC and other areas of the well, stay away from 34″ tires as this will absolutely cause serious rubbing all the way around.
Largest Tire Size with Leveling Kit?
The largest tire size you can run 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, you should be 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.
If you have a 3″ leveling kit and throw on 33″ tires, you are more than likely going to trim something. Small 33″ tires are probably as big as you want to go unless you want to get into serious adjustments.
Largest Tire Size with Lift Kit?
Most owners that have a lift kit are still at the same level of a leveling kit. The basic lift kit for a 4Runner is 3″-3.5″. 33″ tires are usually fine without any modifications, but it also depends on the exact measurements of your 33″ tires.
Small 33″ tires should be fine but if you get into 33.5″ tires or 33.7″ tires, you will need to do some adjustments.
With 33″ tires, you still always run the risk of a BMC, fender liner mods and actually trimming off parts of your body. We have 34″ tires with a 3″ Icon suspension lift. We had to do numerous modifications to our 4Runner.
Common examples with a 3″ leveling or lift kit:
- 275/70R17s are 32.16″ tires. Fender liners and minimal trimming needed.
- 285/70R17s are 32.71″ tires. Fender liners for sure, BMC likely, body trimming optional, rocker caps questionable.
- 285/75R17s are 33.8″ tires. Prepare to trim and chop everything.
With 33.8″ (34″) tires, we had to chop our body mounts, push back our fender liners, slice big 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, KINGS or any others so you have more flexibility in your adjustments.
Do I want to go as large as possible?
Not always. Going with the biggest tire you can 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 easier. It also depends on the driver and how much experience you have. Also airing down your tires has a big impact on what you can do and what you can clear.
What are the downsides of going big?
Gas mileage and trimming 4Runner liners and plastics. When you make the jump to 34″ tires, you will see a decline in gas mileage. Even if you regear (change the gearing ratio), 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.
When you add larger tires, you are forcing the factory gearing ratio to turn more times in order to turn your wheel. You are also creating higher RPMs when forcing those tires to turn. With 33″ tires, re-gearing is debatable. With 34″ tires, gearing is probably recommended but not needed.
At what point do I need a BMC (Body Mount Chop)
- The Metal Tech BMC Kit: Check Today’s Price
This all depends on what lift kit or leveling kit you have. 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, but not always. Once you go to 33″ tires, you should do a body mount chop just in case.
If you only have a 2″ leveling kit with 33″ tires, you will likely need to do a BMC for sure.
With 34″ tires and a 3″ lift or level, you will need to do a BMC, trim your fender liners, push back your fender liners and cut into your 4Runner’s body. Aftermarket UCAs (Upper Control Arms) are also recommended but not always needed. It really depends on your exact wheel size.
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″ 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 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, but not always. When it comes to our 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 Mods (Part 1).
$100-$200/ per tire
- Yokohama Geolandar A/T: $120+ (Light tread depth)
- Firestone Destination A/T: $120-$150+
- General Grabber A/T: $120-$170+
- Nitto Terra Grapplers A/T: $150+
- Toyo Open Country A/T: $150+
- Cooper Discoverer A/T: 150+
$200-$500/ per tire
- BF Goodrich KO2 A/T: $250-$350+
- Toyo Open Country A/T 2: $260+
- Nitto Trail Grapplers A/T: $300+
- Goodyear Duratrac A/T: $400+
- Cooper Discoverer STT Pro Off Road Tire A/T: $400+
- Goodyear Wrangler Duratrac A/T: $400+