40s Tires Breakdown. Which is the best?

[PorterW1111]

I had the same question a little over a month ago and I wasn’t crazy about the wear I received from the original BFG KO2s after asking members of the forum and weighing out the amount of towing load and highway miles I put on my 2018 Gen 2 I decided to replace them with the BFG KO2s again. Replaced at 34k Miles but they are rated for 50k mikes. I will do a better job of aligning the tires in the future. I hope this helps. In the end it was the load rating that swayed me the most. Good luck!

This big hurdle here is the small selection of tires in 40”

 

[zombiekiller]

any experience with the kr3 on wet assphalt? i will likely run into rainy wet roads often and have family in the truck. Basically will they turn into skid on ice, or just not so performant?

you just can't drive a truck on 40s like a nissan altima. it really isn't any different than having to be careful on pavement when you're running a spool. If you put your foot into it when turning, in the rain, you better be prepared for the rear end to step out. you'll still have grip, but the rear of the truck will break traction. The colder the tires, the colder the ambient temps and the greater the amount of rain, the worse it will get.

The tires are also bias ply and will flat spot when they sit too long. It takes a good 5-10 miles for them to get up to operating temp.

Do they grip like a DOT tire cold, wet roads? No, it is a race tire.

Will they work on a true daily driver? No. ( They aren't designed to heat cycle that many times and the compound will get more brittle more quickly when compared to a DOT tire.)

hell, the Dakar compound behaves opposite to most other tires on the market. They are sticky when cold, and get harder when warm. ( so they behave like paddles in sand when hot)

at the end of the day, it is a race tire, not designed or tested for road duty. It has its quirks if you try to use it for what it wasn't designed for.

That being said, I have driven thousands of miles on-road on KR3s with no more than 25PSI in the tires at any time. I have driven sustained speeds up to 130ish both on pavement and in the dirt. I haven't had a single issue with them.

I haven't found another tire that I like more. If you put them on and hate them, don't paint me as the devil, I'm just sharing my experience.

If all of that scares you, I'd probably run a Goodyear MTR in 40. they Are DOT and more of crawler tire, but they'll hold up just fine.

The Toyos are HEAVYYYYYY. a 37x13.50r17 Toyo Open Country M/T is a good 8 lbs heavier than a BFG KR3 40x12.5r17. I don't want to know what a 40 weighs. ( I have the toyos on my super duty).

Running 40s on a raptor that is going to retain 4wd will limit your gear ration choices ( at least the wiser options). I would recommend going to 4.88 ( no deeper) if you retain 4wd. If you are going 2wd, I'd recommend 5.13s.

 

[PorterW1111]

you just can't drive a truck on 40s like a nissan altima. it really isn't any different than having to be careful on pavement when you're running a spool. If you put your foot into it when turning, in the rain, you better be prepared for the rear end to step out. you'll still have grip, but the rear of the truck will break traction. The colder the tires, the colder the ambient temps and the greater the amount of rain, the worse it will get.

The tires are also bias ply and will flat spot when they sit too long. It takes a good 5-10 miles for them to get up to operating temp.

Do they grip like a DOT tire cold, wet roads? No, it is a race tire.

Will they work on a true daily driver? No. ( They aren't designed to heat cycle that many times and the compound will get more brittle more quickly when compared to a DOT tire.)

hell, the Dakar compound behaves opposite to most other tires on the market. They are sticky when cold, and get harder when warm. ( so they behave like paddles in sand when hot)

at the end of the day, it is a race tire, not designed or tested for road duty. It has its quirks if you try to use it for what it wasn't designed for.

That being said, I have driven thousands of miles on-road on KR3s with no more than 25PSI in the tires at any time. I have driven sustained speeds up to 130ish both on pavement and in the dirt. I haven't had a single issue with them.

I haven't found another tire that I like more. If you put them on and hate them, don't paint me as the devil, I'm just sharing my experience.

If all of that scares you, I'd probably run a Goodyear MTR in 40. they Are DOT and more of crawler tire, but they'll hold up just fine.

The Toyos are HEAVYYYYYY. a 37x13.50r17 Toyo Open Country M/T is a good 8 lbs heavier than a BFG KR3 40x12.5r17. I don't want to know what a 40 weighs. ( I have the toyos on my super duty).

Running 40s on a raptor that is going to retain 4wd will limit your gear ration choices ( at least the wiser options). I would recommend going to 4.88 ( no deeper) if you retain 4wd. If you are going 2wd, I'd recommend 5.13s.

this is the exact experience i was looking for. full disclosure i WANT to run the KR3. florida is hot always so not concerned about tires getting cold haha. the table above shows the ridiculous weight of the toyo 40. the truck these are going on is a super charged 5.4 2wd ford 9 3/4 rear with locker and 4.88s.

im also have on order the McNeil gen2 one piece and bedsides so seeing these tires under your truck with the same glass gives me the idea of what they will look like

 

[zombiekiller]

this is the exact experience i was looking for. full disclosure i WANT to run the KR3. florida is hot always so not concerned about tires getting cold haha. the table above shows the ridiculous weight of the toyo 40. the truck these are going on is a super charged 5.4 2wd ford 9 3/4 rear with locker and 4.88s.

im also have on order the McNeil gen2 one piece and bedsides so seeing these tires under your truck with the same glass gives me the idea of what they will look like

the only time that the KR3s have made me nervous in new Orleans was once they got below about 40% tread and the ambient temps were down below 40 degrees.

the weather is usually pretty similar in New Orleans and most of FL. Hot, humid, rainy, swampy.

 

[MrGable27]

My buddy runs BFGs on his 1400 class truck (you’ve probably seen it in some of hoonigan’s videos) and he loves em. He runs their 40” Baja T/A, but they are ooooutraaaaaageously expensive.

 

[zombiekiller]

My buddy runs BFGs on his 1400 class truck (you’ve probably seen it in some of hoonigan’s videos) and he loves em. He runs their 40” Baja T/A, but they are ooooutraaaaaageously expensive.

racer price on KR3 generally floats between 250 and 550 per tire, depending on how many you buy, who's account you're using, etc.

the Baja T/As ( KRs) are 39s and wayyyyyyy different from the KR3.

KRs feel like controlled chaos. They are very "slidey", yet very predictable. as Harry said in days of thunder, " loose is fast and on the edge of out of control".

KR3s feel a lot more hooked up. They will still slide, but don't feel as loose. I think they are more predictable than KRs, but a lot of guys that I run with prefer the controlled chaos driving feel. ( it also makes for better pics due to wheel spin ).

The KR3s are quite a bit lighter, a little skinnier, and a full 1.5" taller when compared to the KRs.

KR3s get better as they wear, KRs do not.

 

[PorterW1111]

racer price on KR3 generally floats between 250 and 550 per tire, depending on how many you buy, who's account you're using, etc.

the Baja T/As ( KRs) are 39s and wayyyyyyy different from the KR3.

KRs feel like controlled chaos. They are very "slidey", yet very predictable. as Harry said in days of thunder, " loose is fast and on the edge of out of control".

KR3s feel a lot more hooked up. They will still slide, but don't feel as loose. I think they are more predictable than KRs, but a lot of guys that I run with prefer the controlled chaos driving feel. ( it also makes for better pics due to wheel spin ).

The KR3s are quite a bit lighter, a little skinnier, and a full 1.5" taller when compared to the KRs.

KR3s get better as they wear, KRs do not.

sooo youve got one of those $250 each accounts? lol need 6...

 

[zombiekiller]

sooo youve got one of those $250 each accounts? lol need 6...

sorry homie, my last name ain't menzies or mcmillan.

 

[PorterW1111]

sorry homie, my last name ain't menzies or mcmillan.

hmm so i actually am only about 20min from oren, menzies navigator... but arnt they sponsored by toyo? good point maybe ill reach out though

 

[06z]

Running 40s on a raptor that is going to retain 4wd will limit your gear ration choices ( at least the wiser options). I would recommend going to 4.88 ( no deeper) if you retain 4wd. If you are going 2wd, I'd recommend 5.13s.

Hey Zombiekiller,
What about running the 39 KR's which are actually 38.5" and 5.13 gears on 4wd raptor?
Why are running 5.13's, 40's and 4wd an issue?
Thanks in advance