Is everyone running E load tires?

[Lion77]

Thats why the Ford spec KO3s are nearly and inch narrower than standard 285/70R17 profile tires from other brands. Even the non OE spec KO3s like the white letter version even in load C is 1/2 wider tread than the Ford spec. Its to meet their EPA targets. KO3s run narrow, but the OE spec reduces tread with even more.

I think that for me, before I consider going up a size im going to try the Pirelli XTMs in 285/70R17 first. They have nearly 1" wider tread but same diameter as the KO3s.

Width gives you flotation and lateral traction in corners, diameter gives your more forward bite.

At the same air pressure, changing tire profile doesnt increase or decrease your contact patch, rather it reshapes it.

Lowering air pressure is what actually increases it. Also thicker side walls need to use lower air pressure to get the same contact patch and debead more easily since the thicker sidewall transfers more force to the bead (less flex).

Thats good in high performance cars on a track, bad on an offroad truck a
running with reduced air pressure.

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[cc1999]

Thats why the Ford spec KO3s are nearly and inch narrower than standard 285/70R17 profile tires from other brands. Even the non OE spec KO3s like the white letter version even in load C is 1/2 wider tread than the Ford spec. Its to meet their EPA targets. KO3s run narrow, but the OE spec reduces tread with even more.

I think that for me, before I consider going up a size im going to try the Pirelli XTMs in 285/70R17 first. They have nearly 1" wider tread but same diameter as the KO3s.

Width gives you flotation and lateral traction in corners, diameter gives your more forward bite.

At the same air pressure, changing tire profile doesnt increase or decrease your contact patch, rather it reshapes it.

Lowering air pressure is what actually increases it. Also thicker side walls need to use lower air pressure to get the same contact patch and debead more easily since the thicker sidewall transfers more force to the bead (less flex).

Thats good in high performance cars on a track, bad on an offroad truck a
running with reduced air pressure.

That is interesting, I knew they were crazy narrow for a 285 tire. Didn't know that about the OE spec being different from the other versions.

 

[cc1999]

I went from C to E on my f150 tremor, pretty much the only option for 35's and the ride quality, fuel economy, and acceleration suffered. But they looked good, the Baja Boss is really nice tire but its also heavy


be nice if there was some more 34" C rated options for the RR, keep in mind if you go bigger than stock with the FP Tune you voicd their warranty

Yep, I agree.

I had the 295s load Es on my truck, they really killed the fuel milage.
I was down in the low teens. 12-14mpg

I went to the 285 Falken AT4Ws and got pretty much the same actual tread width as the 295s a full inch wider then the OEM KO3s and was able to get them in an P285 SL, so I got rid of all that added weight and gained back about 2-3 mpg. Now back to 15-16 mpg.

 

[Lion77]

Yah the width gives you the "big tire" look more so than diameter. So a 33x12.5 looks bigger than a 285/75R17 even though its larger diameter than the 33x12.5. Check out the forum from the aussie guy with a custom fabed bumper. He ahd 33x12.5s on his raptor showing the custom bumper and parked it next to a stock RR and the 33x12.5s looked huge compared to the stock KO3s despite being a measly 0.2 in bigger diameter. Its the width.

https://www.ranger6g.com/forum/threads/custom-aluminium-bumper.29107/

Look at the pics, would you believe those are both 33" tires?

 

[MarcR]

Yah the width gives you the "big tire" look more so than diameter. So a 33x12.5 looks bigger than a 285/75R17 even though its larger diameter than the 33x12.5. Check out the forum from the aussie guy with a custom fabed bumper. He ahd 33x12.5s on his raptor showing the custom bumper and parked it next to a stock RR and the 33x12.5s looked huge compared to the stock KO3s despite being a measly 0.2 in bigger diameter. Its the width.

https://www.ranger6g.com/forum/threads/custom-aluminium-bumper.29107/

Look at the pics, would you believe those are both 33" tires?

Is that linked post's tire the Pirelli's XTM AT on stock size 285/70/17? Holy cow.

 

[Pic-N-Stick]

Yep, I agree.

I had the 295s load Es on my truck, they really killed the fuel milage.
I was down in the low teens. 12-14mpg

I went to the 285 Falken AT4Ws and got pretty much the same actual tread width as the 295s a full inch wider then the OEM KO3s and was able to get them in an P285 SL, so I got rid of all that added weight and gained back about 2-3 mpg. Now back to 15-16 mpg.

Hey, how loud are the Falcons compared to OEM BFG's that have been broken in? My BFG's are quite a bit louder with 3300 on them than new.

 

[cc1999]

Hey, how loud are the Falcons compared to OEM BFG's that have been broken in? My BFG's are quite a bit louder with 3300 on them than new.

I think they are quieter day one and now that I have over 10K on the first set on my 2024 RR, I still think they are quieter then the K03s.

 

[Lion77]

Is that linked post's tire the Pirelli's XTM AT on stock size 285/70/17? Holy cow.

No. Those are Maxxis Razr MTs. They are 33x12.5, and thats next to a stock RR with 285/70R17s. There's literally only 0.2" difference in diameter.

The "big tire look" on that truck is coming entirely from the additional tire width and the added wheel offset. The high clearance bumper and front level probably adds to it, but most of the big tire look is from the tread width and wheel offset.

 

[MarcR]

No. Those are Maxxis Razr MTs. They are 33x12.5, and thats next to a stock RR with 285/70R17s. There's literally only 0.2" difference in diameter.

The "big tire look" on that truck is coming entirely from the additional tire width and the added wheel offset. The high clearance bumper and front level probably adds to it, but most of the big tire look is from the tread width and wheel offset.

Ah got it. When I read over that briefly, I thought the Maxxis Razr were the rim/wheel name, not the tires. Did you install the Pirellis and have any pics? Seems like most brands will always be bigger in tread with compared to the stock KO3s after looking into comparisons in tirerack.

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