Move from 20" to 18" tires on a 2020 4runner ltd

I want to move from 20" wheels to 18" on my 2020LTD.

Anything I should avoid and what's the best 18" tire for combination highway road and off road?

Will I have to trim anything if I trade to 18"? The 20" do nothing other than cost alot and make me feel less stable

 

4Runner factory 17in SR5 or TRD ORP wheels with factory size 265/70R17 tires should be the easiest route.

 

The wheel doesn't determine overall tire size, so you only have to trim if you go with a large(r) tire (a 31" tire on a 20" wheel is the same diameter as a 31" tire on a 17" wheel).

 

welcome

 

You'd have way more options and better pricing options at 17" for both wheels and matching tires. Probably a ton of 17" stock ORP wheels available to you locally through Facebook Marketplace or a dealer.

 

The 17” Off Road Premium OEM wheels have the same offset +15mm as your 20” OEM wheels. The backspace on the 17” OEM wheels is 4.875”. The backspace on your 20” wheels is 4.5”. The 17” ORP wheels are 7.5” wide vs 7.0” wide on your 20”. I swapped out the 20” for the 17” as it was relatively inexpensive and not much figuring to do since the 17” ORP wheel specs match close enough to the original 20” wheels and your tire options in 17” is vast. I provided a couple of numbers for you if you wanted something different at least you know what you are starting with regarding backspacing, rim width and sizing. Also this 17” setup is nearly identical in height (31.61”) as your 20” setup (31.57”) with tires for a 0.1% increase in height.

 

I spent a lot (!) of time researching 18” and 17” tires for my new-to-me 2020 Limited. I landed on 265/70/17s.

 

Why 18" rims? I changed to 17" and have factory size defenders on mine. No regurts

 

1st off you all rock. I should have asked on this forum earlier vs. The Toyota dealer and local watering hole.

2nd...and maybe this is BS but the reason I asked about 18" from 20 was because there is way more to choose from vs. 20" which is a fact but that 18" wore better that 17" on combination uses. If that is not an issue than 17 for sure.

3rd..Do you think I need to get OEM for 17" for my 2020 LTD or do you think after market is fine? I'm a little concerned of getting rims on FB MP...no other reason than QC in this day and age

 

Wish I could move to 15. I miss the days of 15 inch wheels so bad

 

I would run 16s like I did with my 06 Tundra moving down from 17s if they would clear calipers. More sidewall, more better offroad.

 

17" is literally OEM and made for it - used on every other trim.

Don't know about 18" wearing better - that sounds like salesman b.s.

Oem gets you a 7" width. There are some with an 8" width that look OEM. Matters if you plan on lifting your truck or going bigger tires than stock recommend. All the same, the 8" ones are probably better long run, but I have OEM 17

 

I got 4 of my rims on FB marketplace for $350 and bought a matching spare for $50 on eBay. They were all a little scuffed but they have a heavy clear coat paint. I buffed each wheel out with a drill buffer and some fine car polish. They all came out looking nearly perfect. As far as tires go 265/70/17 there are so many options. I think it only cost me an extra $200 to buy 5 used rims and 5 new tires vs 4x20” new tires as 20” tires were about $100 more each than the 17” tires I got.

I just realized your screen name drummer. Been playing for 40 years myself. Not as much as I used to but still get some time to bash and shake the house.

 

Great info I now have a path and will circle back once I pin down...!

Yeah still hitting the Ludwigs keep shaking the house!

 

Conceptually, 18s make a lot of sense. 20s are just too big. 16s mean a lot of sidewall for a predominantly street driven truck. So, 18's seem like a good compromise. 17s too. Then it comes down to how the truck will be used... or how we want it to look like it will be used ;-) The availability of C-Rated tires is or should be a factor here too. E-Rated tires on a light truck that spends 95% of its time on the street can kinda suck. My 6,000 lbs. 100 Series has E-Rated 33s and I can feel the difference. I definitely didn't want E-Rated on the 4Runner.

Clearly a lot of this is subjective. On the bigger 100 Series, I like 18s. And @Yotaholic, I'm with you 100% on the 15s... for older trucks. I basically built my '84 around 15" wheels and 33s...

 

Awesome build man.

Use case super important. I will use 40% off road/unpaved county roads and I also tow a utility trailer as needed. 60% local and highway.

I'm heading towards 17's and sounds like E from your suggestion.
Thanks

 

To be clear, I like C-Rated for the 4Runner. E-Rated if you're towing, really loading the truck, doing lots of 'wheeling where the risk to sidewall damage is a concern. But that's the opinion of one amateur. ;-)

 

We changed alot of light bulbs on the first floor ceiling from all the vibrations before we switched to LED about 7-8 years ago. Got a gretsch maple with a Roland Edums integrated. Still have my big Tama deep shell kit from the 80’s stacked up in a spare room. Rock on!

 

Bad ass!!

 

FWIW, I have 18"x9" Method MR306 +12 offset with 275/65 R18 tire. I really like how they handle and are a big improvement over the stock 20" wheels. Next tires I plan on 265/65 R18 because they are the same diameter as the OEM setup, speedometer will read correctly, just with more sidewall.

 

The sidewall ratio is the second number, so right now your sidewall is 70% of 275mm (10.8"). If you move to 265/70/18, 70% of 265mm (10.4") will mean you have less sidewall.

(10.4 *.7) + (10.4 * .7) + 18 vs (10.8 * .7) + (10.8 * .7)+ 18
7.28 + 7.28 + 18 vs 7.56 + 7.56 + 18

32" vs 33" (rounded)

 

Correct - 275/65/18s have MORE sidewall than 265/65/18s. But the 265/65/18s have more sidewall than the OE 245/60/20s - with the same diameter/circ.

 

Understood.

 

265/70/17 and 245/60/20 are also the same diameter/circ.

 

Ok, someone has a much fancier calculator than I do!

 

I prefer to use discount tire, tire spec as its more accurate with exact tire than this generic tool. For example if you check Dunlop Grantrek 265/70R17 is 31.7in diameter vs Yokohama geolander 245/60R20 is 31.6in diameter.

 

These sites are awesome when picking wheels and tires...

 

Great info at the right time and the right place. That’s a good one.

 

They’re good for general sizes/fits, but @kmeeg is spot on - tire sizes vary by manufacture. So DiscountTire’s site is good for actual specs - if you’re cutting close or trying to match a size.

 

I have another question, I am finding lots of 17" rim choices on FB MP for this project. Some are saying sensors are not included and some say they are. I know these are expensive I think. If I get 4 rims can I use the sensors from my 20" rims so I don't have to buy new? Are the sensors in the valves themselves or separate?
Thanks..