275/65R18 tires on 2020 SR5 with Sport Option

I am about to buy a 2020 SR5 with TRD sport package option and just curious if the truck will ride smoother "on road" with standard sr5 tires 275/65R18 or the upgraded tires 275/55/R20 that came with sport package. On-road pleasure is what I am after for every days driving. A local dealer here would let me swapt to lesser value 275/65R18 tires hence the question. Your insight is appreciated it. Thanks

 

I have a 19 TRD sport wit the 20's, I truly like the ride, corners great. Bigger sidewalls would help more off road I would think. Will hurt you when it comes to cornering also

 

Your objectives aren’t clear to me. Personally I liked the way the Sport suspension handled, but chose the 1794 for other reasons.

Sport suspensions are generally tuned for spirited cornering. Every vehicle I’ve driven with a sport suspension rides harsher than the base suspension over pot holes, rough roads, expansion joints, Etc. Cornering capability goes hand in hand with low profile tires. The 18” tires will sacrifice cornering for a slightly plusher ride. 18” tires with the sport suspension is a weird combination to me.

If you want cornering without body roll, the sport (With 20s) is the truck for you.

if you just want a plush on road ride and don’t care about cornering, you’re probably better off with a base SR5 suspension with 18” wheels.

I can’t imagine putting base 18 steel wheels on a sport could be good for resale either.

 

5 spoke alloy wheels is what dealer will exchange in place of the 275/55/R20. Sounds like i should stick with basic sr5/limited version. I don't know anything hence the asking. Picked sr5 with sport package just for that cool look. Iam just looking for comfortable daily driver, not into cornering, off-road or anything close to that nature.

Thank you for your insight

 

I have a 2019 Sport with aftermarket rims and 275/70 R18 Ridge Grapplers.

I mostly run the roads but have traction capabilities if I venture offroad. The stock tires did not impress me as offroad tires on a 4WD.

 

I agree, the sport does look cool. I liked the way it drive too. I think a cross between 1794 and sport would have been the perfect truck for me.

Don’t get me wrong, the sport suspension ride isn’t terrible, just a little harsher. My recommendation is to drive them back to back. Try to hit bumps on the test drive. See if you feel a difference.

Also, check the tire pressure on the instrument cluster in the test drive. Tire pressure can make more difference than the suspension in the test drive. I noticed the dealer had the pressure on the low side in my 1794 when I test drove it. When I got it home and put more air in, the ride got a little firmer. I’ve wondered if that’s why the off-road felt bouncier in the test drive.

 

The standard 18" wheel and 275/65-18 tire will deliver the ride you are looking for.

 

Have you tested drive 1794 and Limited - do they feel similar. 1794 interior/seat sure is nice but the price is a little more out of my budget. I may just get the basic limited and call it done

 

Limited and 1794 with 20” wheels should ride the exact same. They have the same suspension.

 

Thank you

 

Typically the taller the sidewall on the tire is, the smoother the ride is.

 

The aftermarket did change the ride to softer and better looks.

 

So for Tundra SR5, 275/70 R18 is the best tires for on road comfort daily uses? Can I use 275/70/18 tires with Toyota 5 Spoke Alloy 18" wheels? Thanks

 

I wouldn't use a tire that tall, 275/65 is perfect.
The 275/70 is taller than standard and it will throw your speedometer reading off, you will be going FASTer than indicated.

 

So if I get the basic Limited version and have dealer change out the 20" wheels for 5 spoke alloy 18 wheels, I will be in Heaven as far as soft comfortable ride concern

 

I don't know your experience with how pickup trucks ride, so I recommend driving the same body style truck that has 275/65 18's on it.

 

That’s probably your best bet at a soft ride on the road. It’ll be the same ride as a plain SR5.

I wouldn’t call it heaven bc it is still a pickup truck.

 

Makes perfect sense. Thanks

 

I will add that with the 275/70 18's I did have to remove the mudflaps with rim offset of +20

 

Thanks John

 

275/70-18 tires are going to be E rated, so they will ride stiffer than stock. For best ride stick with stock sizes and standard load tires.

 

What size tires are those and is that stock suspension?

 

Stock tires on trd sport are 275/55R20

 

I know, I have a TRD Sport. Was wondering on the pic John posted with the swapped out rims.

 

The stock 275/65/18 Michelin at2’s ride like butter on the highway yet grip like rails in the mountains. I just put some stock take offs on my truck, i LOVE them

 

18x9 Fuel Anza +20 with 275/70 R18 Ridge Grapplers.

Stock suspension. Mudflaps removed.

 

You have that backwards. Bigger tires will make you go faster than indicated. As for OP. I've had both and currently have a 19 Sport. The Sport itself is going to have a little rougher ride on uneven roads. Like potholes, speed bumps, transitions etc. Due to it having stiffer sway bars and sport tuned shocks. You'll really get rocked if you go over a speed bump with just one side of the truck. 18's will help cushion the ride but on uneven surfaces, side to side, you're still gonna get tossed a little more vs a non Sport truck. IMO if you're set on the Sport (I was for looks) get you 18's with the 275/70's, they are about 1in taller than 65 series. For a plusher ride, do some 5100 Bilsteins on the lowest setting up front. I think you'll get a small bit of lift on the lowest setting. For wheels, I prefer stock wheels. But unless they are TRD OR 18's, the 20's are worth more. You might roll the 20's and look for some 18's, then sell the 20's.

 

Great advise Rockgate. Thank you

 

Isnt it the other way? The taller the tire the faster you go vs yr actual reading.
Tire diam 1 = 32” = > 30 mph
Tire diam 2 = 33” => 31 mph. Reading will show 30 when you are actually going 31.

 

See 2 month old post #27