Wheel/Tire Upgrade Photos

[Silverado]

18’s??

Any forum thoughts on the Kahn 20’s. They tell me to run 305/50/20 and I’m looking at the Nitto Grapplers. Thanks

 

[BA_Greni]

I went with the Mickey Thompson Baja Boss 255/85/17, on the factory 17" wheels. So far, so good. It doesn't seem any louder than the stock KO2's. The speedo now almost exactly matches two GPS's. Before it was slow by 3-7 MPH, depending on speed.

Are you on stock suspension (no lift)? Also does the spare tire clear the small rear door and the rear wiper? Thanks

 

[snowball]

Are you on stock suspension (no lift)? Also does the spare tire clear the small rear door and the rear wiper? Thanks

I also run the 255/85 R17 baja boss. I have stock suspension (no lift), and it fits perfectly (no rubbing). The spare doesn't fit, you need a relocation bracket or add spacers to tilt it out for more clearance.

 

[BA_Greni]

I also run the 255/85 R17 baja boss. I have stock suspension (no lift), and it fits perfectly (no rubbing). The spare doesn't fit, you need a relocation bracket or add spacers to tilt it out for more clearance.

Thank you Snowball.

 

[Blackgray]

18’s??

17's

 

[Commodore]

Mickey Thompson 255/85r17 on stock suspension. As others have said, no rubbing what so ever.

 

[ADVAW8S]

255/80r17 are officially on. Next step Radflo shocks tomorrow. It passed the first test, getting in a 6'10 garage. The foldable antenna in back did get pushed flat. I thought I had it low enough leaving this morning.

 

[Theoretician]

I've got the 255/85r17 MT Baja AT tires on the stock wheels and suspension, installed by Discount Tire. They added a bunch more air than necessary to the tires, but I'm running them at roughly 40 psi now on pavement and ~15psi on the trails.

I added two of these washers (https://www.amazon.com/dp/B087WM3DND?tag=globalgrena0b-20) to the bottom lug of the spare wheel, and four to the inboard lug, and now the rear doors open without complaint. Thanks to u/TCMColorado for figuring that out here https://www.theineosforum.com/threads/largest-functional-tire-without-mods.12371337/post-1333306708
Without the washers, I had to open/close both doors at the same time from the interior.

I exercised the 4wd system and new tires on three trips into the mountains over the past week and I can confirm that in crossups (two wheels lifted, two stuffed) and in reasonable mud there was no rubbing. I can also confirm that the speedo is close to accurate after the tires. At~50mph the speedometer reads 1mph slower than GPS, and at ~70mph the speedo reads about 2mph slower than GPS, but below about 40mph the speedo matches GPS.

The tires performed as expected in mud - I had to intentionally spin them into second gear to clear the treads rather than stay in first gear and tractor through, but that's a lot better than most "AT" tires that would need third gear to clear the treads. The tires were EXCELLENT in snow on top of ice. A friend of mine fell into the ditch, or almost off the side of the road, a handful of times in front of me while I just plodded along without issue. Part of that is driving style, certainly, but these things impressed me with how well they handled ~8in of snow on top of ice that was risky to walk on sometimes.

 

[ADVAW8S]

I've got the 255/85r17 MT Baja AT tires on the stock wheels and suspension, installed by Discount Tire. They added a bunch more air than necessary to the tires, but I'm running them at roughly 40 psi now on pavement and ~15psi on the trails.

I added two of these washers (https://www.amazon.com/dp/B087WM3DND?tag=globalgrena0b-20) to the bottom lug of the spare wheel, and four to the inboard lug, and now the rear doors open without complaint. Thanks to u/TCMColorado for figuring that out here https://www.theineosforum.com/threads/largest-functional-tire-without-mods.12371337/post-1333306708
Without the washers, I had to open/close both doors at the same time from the interior.

View attachment 7893985

I exercised the 4wd system and new tires on three trips into the mountains over the past week and I can confirm that in crossups (two wheels lifted, two stuffed) and in reasonable mud there was no rubbing. I can also confirm that the speedo is close to accurate after the tires. At~50mph the speedometer reads 1mph slower than GPS, and at ~70mph the speedo reads about 2mph slower than GPS, but below about 40mph the speedo matches GPS.

The tires performed as expected in mud - I had to intentionally spin them into second gear to clear the treads rather than stay in first gear and tractor through, but that's a lot better than most "AT" tires that would need third gear to clear the treads. The tires were EXCELLENT in snow on top of ice. A friend of mine fell into the ditch, or almost off the side of the road, a handful of times in front of me while I just plodded along without issue. Part of that is driving style, certainly, but these things impressed me with how well they handled ~8in of snow on top of ice that was risky to walk on sometimes.

View attachment 7893986

Discount tires did mine too and they filled the tires big time. They had them at 46 them they lowered it to 42. I'm running 38 I'm from with 40 I'm the back, 38 in front.

I found it funny that they attempted to lift the truck 2 jack. Had to break out the 3 ton.

 

[C-Mack]

255/80r17 are officially on. Next step Radflo shocks tomorrow. It passed the first test, getting in a 6'10 garage. The foldable antenna in back did get pushed flat. I thought I had it low enough leaving this morning.

Did the tire shop really use four floor jacks on that Quartermaster? If just one or those jacks had a slow hydraulic leak or the tech didn’t close the valve tight enough that could have been a disaster. If I was standing nearby and saw things shaping up that way on my vehicle I’d be over like a shot and tell them to stop immediately. I’ve been in shops and witnessed customers vehicles fall off floor jacks before it is very dangerous and is big liability for the shop.

 

[Commodore]

I've got the 255/85r17 MT Baja AT tires on the stock wheels and suspension, installed by Discount Tire. They added a bunch more air than necessary to the tires, but I'm running them at roughly 40 psi now on pavement and ~15psi on the trails.

I added two of these washers (https://www.amazon.com/dp/B087WM3DND?tag=globalgrena0b-20) to the bottom lug of the spare wheel, and four to the inboard lug, and now the rear doors open without complaint. Thanks to u/TCMColorado for figuring that out here https://www.theineosforum.com/threads/largest-functional-tire-without-mods.12371337/post-1333306708
Without the washers, I had to open/close both doors at the same time from the interior.

View attachment 7893985

I exercised the 4wd system and new tires on three trips into the mountains over the past week and I can confirm that in crossups (two wheels lifted, two stuffed) and in reasonable mud there was no rubbing. I can also confirm that the speedo is close to accurate after the tires. At~50mph the speedometer reads 1mph slower than GPS, and at ~70mph the speedo reads about 2mph slower than GPS, but below about 40mph the speedo matches GPS.

The tires performed as expected in mud - I had to intentionally spin them into second gear to clear the treads rather than stay in first gear and tractor through, but that's a lot better than most "AT" tires that would need third gear to clear the treads. The tires were EXCELLENT in snow on top of ice. A friend of mine fell into the ditch, or almost off the side of the road, a handful of times in front of me while I just plodded along without issue. Part of that is driving style, certainly, but these things impressed me with how well they handled ~8in of snow on top of ice that was risky to walk on sometimes.

View attachment 7893986

That is certainly a less expensive solution than the bracket that I purchased. How is the rear camera view?

 

[Theoretician]

That is certainly a less expensive solution than the bracket that I purchased. How is the rear camera view?

Compromised, but useable. The tire is an obvious top quarter or so of the view, as i recall.

 

[BA_Greni]

@Theoretician how is the on road performance compared to stock? Heavier setup, so I'd assume it is noticeable and I am sure this takes a hit on MPG.

 

[Theoretician]

@Theoretician how is the on road performance compared to stock? Heavier setup, so I'd assume it is noticeable and I am sure this takes a hit on MPG.

I don't have a statistically significant amount of data for fuel mileage, but here is what I've got:

So, highway might have gone down from 19.1 to ~17.6 after correcting for the larger radius, but that's literally comparing just one 340 mile trip before to 190 miles after. City/Common usage looks like it dropped a similar amount, but again, very little data here to actually draw conclusions from. For example, the highway run pre-tires was driving on backroads from AZ to NM, so lots of time at ~50-70mph on gradual slopes, whereas the highway usage after tires was mostly at 70mph and climbing or descending a couple of thousand feet at a time.

Steering, acceleration, braking, and road noise are all indistinguishable from the stock dueler ATs. It still has more power available than I generally want to use, steering is still pleasant and return to center hasn't substantially changed, braking is still kinda mushy or isolated but effective, and noise is still determined by poor aerodynamics and insulation more than the tires.

 

[BA_Greni]

I don't have a statistically significant amount of data for fuel mileage, but here is what I've got:
View attachment 7894114
So, highway might have gone down from 19.1 to ~17.6 after correcting for the larger radius, but that's literally comparing just one 340 mile trip before to 190 miles after. City/Common usage looks like it dropped a similar amount, but again, very little data here to actually draw conclusions from. For example, the highway run pre-tires was driving on backroads from AZ to NM, so lots of time at ~50-70mph on gradual slopes, whereas the highway usage after tires was mostly at 70mph and climbing or descending a couple of thousand feet at a time.

Steering, acceleration, braking, and road noise are all indistinguishable from the stock dueler ATs. It still has more power available than I generally want to use, steering is still pleasant and return to center hasn't substantially changed, braking is still kinda mushy or isolated but effective, and noise is still determined by poor aerodynamics and insulation more than the tires.

Impressive spreadsheet! Glad I asked you the question . We don't buy the IG and put larger tires for mpg. I was just curious on the impact and it's negligible. I am debating between this and a set of 285 75 17. Cheers

 

[pmatusov]

So, highway might have gone down from 19.1 to ~17.6 after correcting for the larger radius, but that's literally comparing just one 340 mile trip before to 190 miles after.

I am curious what are your driving habits.
My Grenadier was hovering around 14 mpg on stock tires, now I think I am closer to 12.8-13.3 on 255/80 (33").

 

[anand]

I am curious what are your driving habits.
My Grenadier was hovering around 14 mpg on stock tires, now I think I am closer to 12.8-13.3 on 255/80 (33").

Your numbers are pretty aligned with my experience... But then again, I'm definitely not light-footed and my highway cruise speeds are 75-80 on average

 

[Reducs]

Mine is bone stock suspension and tires (KO2s) and if I get 15.00001 MPG I consider it a win, and rare. 17-19? How?!

 

[Theoretician]

The rear view camera under the 255/85r17 Baja AT tires, with the washers as described in my post above.

As for my driving habits, I stay off of interstate as much as possible so my max speeds are generally 70ish mph. I only spend much time above 3000 rpm if I'm anticipating some road drama or I'm having fun on dirt roads at less than 40 mph. So, I guess you could describe them as "grandpa with an occasional lead foot" rather than "lead foot looking to never be a grandpa"?