20 to 18 inch Wheels

[ATI]

I'm thinking about getting rid of the 20" wheels on my Tundra and going with 18" wheels and I have some questions...
(would 17" wheels be too little? or odd looking?)

1. Do I need to re-calibrate the engine/transmission and ABS System? I'm guessing no, because the diameter is not changing, only the core wheel size, right?!

2. What are the Pros / Cons of moving down from 20 to 18? I'm sure mostly Pros,
(A. gas mileage, B. offroad Handling, C. more comfortable ride...)

3. What size tires should I get for 18" wheels to obtain the goals listed above?

P.S; I have a 2017 SR5 Tundra 5.7 4x4 Double Cab. Any other information or advise is appreciated.

[SAC]

Check spacing between wheel and brake caliper to make sure you have adequate spacing. I don't think it will be an issue going to 18's.

1. If tire diameter is same, no worries.
2. A) probably minimal/no difference. Tire size will factor B & C) More side wall makes for a better ride. IMO.
3. Depends on appearance and performance goals. What size are on there now?

[Dirtymike]

I prefer more tire then wheel. Can air down off road and float over the sand at the beach. Smoother ride.

[Bowhica]

Check spacing between wheel and brake caliper to make sure you have adequate spacing. I don't think it will be an issue going to 18's.

1. If tire diameter is same, no worries.
2. A) probably minimal/no difference. Tire size will factor B & C) More side wall makes for a better ride. IMO.
3. Depends on appearance and performance goals. What size are on there now?

bingo. I went from 20" to 18". They are a little cheaper per wheel and I went from a 35" to a 33" I hit 16 mpg the other day coming home from work.

[ATI]

bingo. I went from 20" to 18". They are a little cheaper per wheel and I went from a 35" to a 33" I hit 16 mpg the other day coming home from work.

16 mpg, from what mpg? and what truck?

[ATI]

Check spacing between wheel and brake caliper to make sure you have adequate spacing. I don't think it will be an issue going to 18's.

1. If tire diameter is same, no worries.
2. A) probably minimal/no difference. Tire size will factor B & C) More side wall makes for a better ride. IMO.
3. Depends on appearance and performance goals. What size are on there now?

I believe I have 275/55R/20.

[whakm]

I put NITTO Exo Grapplers on my 2015 Tundra (285/70/18) and I really like 'em. That tire is 33.98 in size ( so you can compare) and they did rub a little at full turn in reverse (stock suspension). A little lazer cut and they were fine. Think next time I go with Terra Grapplers just for something different.
calculator says you current tire is 31.9 so you gain about 1/3/4 to 2 inches in height and maybe an inch in width. ( ballpark)

[3rdShot]

On my new-to-me 2012 F150, I went from 275/45/R22 to 255/75/R17, which are a bit narrower, a hair taller, and a MUCH smoother ride. Discount Tire website has a conversion / comparison page to see the differences in height / width / revs per mile / etc.

[scotty]

20 to 18 inch Wheels

I have a set of 18” and 20” wheels for my Tundra. I haven’t bought a new set of tires in years. When I figure I have about 10k miles left I start looking for new “take offs” on here and fb market place.

275/55/20
275/65/18
These are the stock sizes for each wheel.

[FireNguns]

Go to 17” cheaper and more tire options.

[Texans42]

I switched from 22 to 18 on wife suburban and 20 to 18 on my f250. Much better ride in both now

[SAC]

I believe I have 275/55R/20.

If you like the ride height, but go to an 18. 275/65 R18. Almost identical dimensions. Tiresize.com has good alternate size info.

[ATI]

I've found some wheels that I like, but they don't have sensors,,, can I swap the sensors from my current 20" wheels to the 18" wheels I'm going to buy?

[Sackett]

Larger sidewall of a 18" tire will be better ride, absorb impacts of potholes better and better suited for a truck.

[dbelcher269]

I've found some wheels that I like, but they don't have sensors,,, can I swap the sensors from my current 20" wheels to the 18" wheels I'm going to buy?

Yes.