Jump to content

Recommended Posts

Posted

I was just looking at tire rack and it seems the 275/60 is 15lbs more than the stock LS2s, and the 275/65 is 17lbs more (2lbs more than 275/60). I would have expected it to weigh more than that. I wonder if there is a bigger MPG hit going 275/65 vs 275/60. If anything, the bigger diameter would probably be the culprit of worse MPG.

The only reason it would be any worse would be because of the speedometer difference. Which if you recalibrate with a tuner, it shouldn't hurt it much at all. And with the right tune, probably even get you better mileage.

Posted (edited)

I couldn't take the useless Goodyear SRA's anymore so I went with 275/65/R18 since these are only used in the winter and I would like to get the best MPG I can. Night and day difference.

 

20160109_150409.jpg

Summer Set up

20151010_154025.jpg

Edited by reds10406
  • Like 4
Posted

I have 275/65/20's on a 2015 All Terrain with a 2.5" level.................this baby feels like a caddy. I little too sluggish (need a tuner) compared to my EcoBoost but man is it smooth. This is my first set of KO2's ( others were KO's) and that's all I'll ever put on my trucks.

  • Like 1
Posted

I couldn't take the useless Goodyear SRA's anymore so I went with 275/65/R18 since these are only used in the winter and I would like to get the best MPG I can. Night and day difference.

 

20160109_150409.jpg

Summer Set up

20151010_154025.jpg

 

What wheels are those?

Posted

I have 275/65/20's on a 2015 All Terrain with a 2.5" level.................this baby feels like a caddy. I little too sluggish (need a tuner) compared to my EcoBoost but man is it smooth. This is my first set of KO2's ( others were KO's) and that's all I'll ever put on my trucks.

Do you have any other pics? Looking at this set up myself. Do you have the 5.3 or 6.2?

Posted

Do you have any other pics? Looking at this set up myself. Do you have the 5.3 or 6.2?

I have the 5.3 w/ 2.5" RC level and rear stock block. I didn't get before and after measurements but my truck still has a 3/4"-1" rake and that's pretty much where I wanted it. The suspensions on the All Terrains area little different from others and you may not get the exact results as I did if your dealing with other than an AT. Here's the only pictures I have.

post-150666-0-92779600-1452812294.jpg

post-150666-0-13455200-1452812330.jpg

post-150666-0-92779600-1452812294.jpg

post-150666-0-13455200-1452812330.jpg

post-150666-0-92779600-1452812294.jpg

post-150666-0-13455200-1452812330.jpg

post-150666-0-92779600-1452812294.jpg

post-150666-0-13455200-1452812330.jpg

Posted

I have 275/65/20's on a 2015 All Terrain with a 2.5" level.................this baby feels like a caddy. I little too sluggish (need a tuner) compared to my EcoBoost but man is it smooth. This is my first set of KO2's ( others were KO's) and that's all I'll ever put on my trucks.

What tire pressure r u running? I have the exact setup but the tires stiffened the ride a bit.
Posted (edited)

Running at 38psi

I came out of a Ford EcoBoost with Bilstein 5100's on top height and the same tires. This runs a lot smoother.

Edited by mmwest
  • 3 weeks later...
Posted

I just picked up some take-off 18" OEM wheels and put some 275 65 18 KO2s on as my snow and towing wheels/tires. The tires are pretty quiet on the freeway but are noticeably louder than the Eagle LS-2s that came on the truck when there's less wind noise. I just got home but I'm certainly pleased.

9791d1454446150t-tires-tow-vehicle-img_3

  • Like 1
Posted

So far 50,000 miles love this tire... will be getting new ones next November. So I'm sure they will have 80,000 + on them. 275/60/20b0a2abbd72fcd5a79da3d4f35a5264e5.jpg5f2d19b984bfa8dccd1a6c4f1001e42a.jpg

Posted

I just picked up some take-off 18" OEM wheels and put some 275 65 18 KO2s on as my snow and towing wheels/tires. The tires are pretty quiet on the freeway but are noticeably louder than the Eagle LS-2s that came on the truck when there's less wind noise. I just got home but I'm certainly pleased.

9791d1454446150t-tires-tow-vehicle-img_3

And those are load range E tires correct? Not D which is standard for these trucks. How does that affect the ride quality or your mpg's? I hate that the only 18" rim versions of these tires are load range E.

 

I wish I had a non z71 with 17" rims. The money saved on the truck could have gone to immediate upgrades at shocks, metal skid plates, and better quality tires.

 

 

Sent from my iPhone using Tapatalk

Posted

And those are load range E tires correct? Not D which is standard for these trucks. How does that affect the ride quality or your mpg's? I hate that the only 18" rim versions of these tires are load range E.

 

I wish I had a non z71 with 17" rims. The money saved on the truck could have gone to immediate upgrades at shocks, metal skid plates, and better quality tires.

 

 

Sent from my iPhone using Tapatalk

 

Yes, these are E load range and you definitely know they're on there. I feel like everything about the truck movement seems a little lazy from acceleration to suspension movement. It's not bad nor do the tires make the truck ride uncomfortable, just different. I've only driven maybe a 100 miles since they were installed so I can't say much about fuel economy. We're heading to the mountains next weekend which will be the first trip we will take in this truck.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
  • Recently Browsing   0 members

    • No registered users viewing this page.
  • Forum Statistics

    250.5k
    Total Topics
    2.7m
    Total Posts
  • Member Statistics

    342,894
    Total Members
    8,960
    Most Online
    TopBo
    Newest Member
    TopBo
    Joined
  • Who's Online   1 Member, 0 Anonymous, 693 Guests (See full list)


  • Latest Articles

  • Posts

    • not all plugs will be used.  gm uses more generic harnesses that support most/all options, and if your truck doesn't have a specfiic option, the plug won't be used (commonly will have a dummy insert in the plug , or it'll be taped up, but some may just be left as is).  But it's sldo possible some p.o. has installed the wrong/cheaper parts that aren't correct for your vehicle...
    • First off, I'm not trying to just get easy advice/fixes for the issues I've noticed so far.  I'll be combing through the site via searches and such, and if past experiences are any indication, should find what I need.  For the sake of conversation, though, I figured I'd post the handful of things I've noticed in the 12 hours since buying my 2010 SLE CCSB.     Indicator lights: Airbag and TPMS.  The tire pressures aren't reading for any of the wheels, so I'm pretty certain the sensors were either removed, are damaged, or are otherwise inoperable.  I used to mount and balance tires 25 years ago but am pretty much ignorant when it comes to TPMS.  My 2006 didn't have the sensors and this might be the fourth vehicle I've owned that does.     Radio: Rear speakers aren't working.  I removed the driver's side rear door panel and checked the speaker and wiring.  I also removed the sill and b-pillar covers to check the wiring.  A few minutes of Google Fu showed that this is potentially a head unit issue.    Switches: Power mirrors don't turn left/right.  I ordered replacement driver's door switches that should arrive tomorrow.  The windows and locks work but it was only about $20 for all of them.  The driver's side rear window switch lets the window down but won't put it back up.  I think the passenger rear doesn't work at all.  In the coming days/weeks, I'll break out my multimeter to check all of that.   Unknown wiring harness: There's a box attached to the front driver's side of the engine compartment, right where the second battery shelf is located.  There are three plugs, one of which looks like it fits a standard headlight-style bulb (9007 or similar).  It doesn't look like it's plugged into anything.  I'll do some digging and if I don't see anything elsewhere on the site, post some pictures here.   Unknown plugs on brake booster: There are at least two female plugs on the brake booster that aren't being used.  I think it might be a replacement/aftermarket, so maybe those are used for a different application, as there don't seem to be any unplugged harnesses and no indicator lights are on.   Little squeaks when turning: Sounds almost like a bushing around the bed of the truck.  I'll have to pay close attention as I get more familiar with the truck.   Clunk on acceleration: possibly the infamous drivetrain clunk.  My 2006 had it and I'm just not familiar enough with this truck yet to fully grasp what it is.   Anyway, my apologies for the vague and all over the place post.  This truck is new to me, and it's been four years since I drove my 2006.  With 200k miles, I know I'll need to learn this truck quickly to avoid having any major issues, despite being confident it's got much more life to it.  My 2006 had nearly 320k on it when I parked it (nearly 300k of which I put on the truck), and it was still drivable then, though I suspected the head gasket might have blown.  I'd hoped to have that truck back by now, but it's gone forever, as I detailed in my reintroduction thread.  
    • I always drive in Sport mode. With more driving, I am finding the initial response when accelerating is much quicker now🖕 Lou
    • Is it an optical illusion in the pic or is the truck really squatting that much horribly?
    • My initial introduction was here.  It's hard to believe that I last posted in February 2013, having just deployed to Kyrgyzstan.  Since then, I've retired from the military and the 2006 Sierra SLT Z71 that first brought me to these pages was lost.  I went forward to Afghanistan in March 2013 and did a lot of sitting behind a computer on brigade staff.  Within 18 months of getting back to the States, I was selected for Drill Sergeant duty, after which I moved back to Virginia (my home state and where I served from 2004-2008).  That '06 Sierra did a lot of driving between Louisiana, Georgia, and Virginia, and ended up with nearly 320k miles by 2022.  By then, the registration had been expired for a couple of years, but the pandemic had all but eliminated tickets for such transgressions.  Admittedly too, I usually drove my wife's SUV or son's car the 2-3 times a week I had to report to work.  Teleworking sure was fun while it lasted.   I started my retirement leave four years ago and stored the Sierra at my sister's house.  A big mess was made when her fiancé passed while she was taking care of business out-of-state in late-2024, and his son pretty much mismanaged everything to do with the estate.  Even so, I was assured that my truck was safe... until it wasn't.  I found out that my truck had been scrapped about four months after the son took over everything.  There's nothing I could do; I'm 1000 miles away and it was technically abandoned property since he'd even trespassed my sister from her own house (she had no claim to it as she wasn't married, and the fiancé was the sole owner).     Anyway, today I got my second Sierra.  This is a 2010 SLE 2WB CCSB with a little over 200k miles on it.  It's got the 5.3L I'm familiar with and should handle what I need it for.  Hauling stuff that won't fit in the Transit Connect (yep, I sold out, but that's the wife's vehicle) and towing a few times a year tops.  The price seemed decent, considering how much people sell their trucks for in the Deep South: $4500.  I've seen similar trucks listed for more than double that.  I got it from a coworker who left his tag on until we transfer the title next week (Louisiana requires a notary for transfers), so I've been driving it all day.  The rear speakers don't work, which is one of the things that brought me back to these forums earlier.  I can't say how active I'll be as a poster, but I'll be scouring the archives while I find out every little thing I can about the 2010s and particular nuances/problems with my truck.   It's definitely not a GMC, but I got another Willys Jeep a few months back as well, so I'm almost at the same place I was when I first joined gm-trucks.com.  My old 1960 DJ3A was sold back around 2010 or 2011; my current Jeep is a 1946 CJ2A.  So, I've got a slightly newer GMC and a much older Jeep.  I kind of wish I still had that F-250 I had way back when too.  The Dakota is long gone and was technically my brother's truck, though I had it registered and insured.  The F-250 had to go when my grandmother's house was foreclosed on due to mismanagement around 2012 or so.     Hopefully anyone that made it this far isn't too annoyed.  I tend to be long-winded, but I'll be doing more reading than posting in the coming months.
  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...