275/65/20 - TundraTalk.net

russ7pa · 05-30-2012, 03:52 PM

Who has 275/65/20 set up? i'm deciding between this and 285/65/20 and concerned 275/65 might look too tall/skinny, but looking at additional $300+ to go 285/65. pics and stating which kit/setup you have would be great! also deciding between 2" in front vs 3/1...

MomentumTundra · 05-31-2012, 11:19 PM

Quote:

Originally Posted by russ7pa

Who has 275/65/20 set up? i'm deciding between this and 285/65/20 and concerned 275/65 might look too tall/skinny, but looking at additional $300+ to go 285/65. pics and stating which kit/setup you have would be great! also deciding between 2" in front vs 3/1...

I'm in the same boat. My 5100's are on the way. I don't know if I want to do the 275/65/20 or the 285/65/20. I know the 275's will be more fuel efficient. I have a CM platinum.

russ7pa · 06-01-2012, 11:36 AM

Quote:

Originally Posted by MomentumTundra

I'm in the same boat. My 5100's are on the way. I don't know if I want to do the 275/65/20 or the 285/65/20. I know the 275's will be more fuel efficient. I have a CM platinum.

better mileage, save loot on tires. plus the cooper discoverer AT3 or Zeon LTZ both get awesome reviews and only come in that size. 285/65/20 and 285/60/20 are the other 2 sizes I would consider and way more expensive and limited selection. i'm gonna do the BFG TA KO in 285/65/20 if I decide to go that big.

BlackRCSB · 06-01-2012, 11:16 PM

The 275/65/20 is a 34.1" tall tire. The 285/60/20 is 33.5" tall.

The 285 would get the better gas mileage by a small amount.

BlackRCSB · 06-01-2012, 11:23 PM

Quote:

Originally Posted by BlackRCSB

The 275/65/20 is a 34.1" tall tire. The 285/60/20 is 33.5" tall.

The 285 would get the better gas mileage by a small amount.

Missed that one. You are asking about the 275/65/20 vs the 285/65/20.

The gas mileage win goes to the 275's the 285's are 34.7" tall

ebenke · 06-02-2012, 12:48 AM

Is it the width or the height or the weight that affects fuel economy the most?

E Benke, mobile
Sent from my iPhone

russ7pa · 06-02-2012, 10:13 AM

^^ good question...i thought it was based on width and weight b/c of resistance. when people talk about the overall diameter/circumference affecting mileage i wonder if it's b/c they don't get recalibrated so the overall circumference is making the larger tire not turn as much as the smaller tire = less mileage registered but not the true distance traveled...anyone actually know the answer instead of just speculating like me?

Daveownsjoo · 06-21-2012, 06:41 PM

Quote:

Originally Posted by ebenke

Is it the width or the height or the weight that affects fuel economy the most?

E Benke, mobile
Sent from my iPhone

I believe it is all 3 that factor in and you really can't say one is more than the other. I think it is the moment of inertia that affects your fuel economy. Your truck has to get the wheels turning and it takes more force to get more weight at a further radius from the axle turning. So, weight, width (contributes to weight), and height all factor in. Now, it gets more complicated because you have an angular momentum once you get moving but this may actually not contribute to the linear momentum of the vehicle...I am pretty rusty on all this stuff. Bottom line, if you go bigger, expect some drop in MPG.

That being said, I am in the same boat. I have a stock 08 DC LTD with 20s and I am getting ready to grab 5100s and new tires. I want to fill out the wheel well with some ATs but not sure what size. I would like to go wider than the 275 and taller as well but not so wide and tall that I rub. I would think I can fit a wide 33" tire...maybe 33x12?

screaminz2002 · 06-21-2012, 09:06 PM

Subscribing

I didn't get much done at work since I was looking at tires all day.. I even wrote down all the specs and pricing for the grappler m/t and the duratracs. Seems like you can spend several hundred more by going up .5 in diameter.. or you can save that by choosing a particular tire in a specific size. I am no closer to choosing one then I was this morning.

I mean are you really going to notice .5 diameter in height, an inch in width, or will you regret not spending the extra 300.00 for the next 50k miles?

Hard questions

shabetta · 06-21-2012, 09:57 PM

I'm on the same page. I really want something bigger but the same time don't want to spend the money on wheels. But it's hard as it seems no matter what the stock 20 just don't seem big enough thanks to the offset.