37x12.5x17 help with decission

[h24bob]

stock tires are worn out want to go bigger using stock rims i know there are many threads on this but just want to get an update ,things i no are slight loss in gas consumption,no rubbing ,speedo reading slightly off are there any major issues you have experienced using this size ,would appreciate your comments

[HumminNBoatin']

Just get a good name brand set and enjoy them. Should fit with no problems.

[h24bob]

sounds as though im good to go i will stick with bfg thanks for your input

[orlasttoy]

post some pix when u get em...I'm in the same situation!

[MarineHawk]

I put about 50K mi on my Cooper 37" STT tires on my 06 H2. i replaced them a couple of months ago. I loved the STTs, and wanted to buy another pair. I honestly think they have the best traction across the spectrum of any offroad tire I have ever owned. But I was having just enough rubbing at full turn to make me want to solve that problem.
The 37" Coopers are 13.1" wide (according to specs--though enumerated as 12.5-inch). The 37" BFG KM2s are supposedly a true 12.5" wide. So, I went with the KM2s. I also put on some Moto-Metal wheels with in inch less backspacing--4.5"; the stock ones have 5.5".

I now have no rubbing at all ever. Also, and I cannot explain this at all: I constantly monitor my mpgs every day (just bored, I suppose). I had a local shop install the tires and wheels. I also had a new allignment and Royal Purple (had been using Mobile 1). I don't know which among those factors have strangely caused this, but I am getting somewhere between 0.5 and 0.7 better mpgs--consistently with the exact same driving patters. It makes no sense to me, but it's definitely gone up.

[Cazador]

Very interesting MarineHawk. I have the 37" Cooper STTs as well, on my second set now, LOVE them to death. I only have a teeny tiny bit of rubbing when turning full lock. I know some have no rubbing at all, I guess all H2s are a bit different.

Can you give a comparison of the STTs and the KM2s? Noise? Traction? Ride?

[guruerror]

BFG Mud-Terrain (37x12.50x17) on stock rims. No rubbing...but I also put on the Cognito leveling kit, so that might have helped a bit.

I find the BFGs mud-terrains to be a slight bit louder than the BFG all-terrains on the road; but I hardly even notice (of course I also put on some headers and a Flowmaster exhaust...so that could be skewing my perception of the actual noise difference).

[h24bob]

hey thanks for all the attention i,going to stick with 37 bfg ta ko oh and by the way happy holidays love this forum one all and all for one

[MarineHawk]

Originally Posted by Cazador

Very interesting MarineHawk. I have the 37" Cooper STTs as well, on my second set now, LOVE them to death. I only have a teeny tiny bit of rubbing when turning full lock. I know some have no rubbing at all, I guess all H2s are a bit different.

Can you give a comparison of the STTs and the KM2s? Noise? Traction? Ride?

True enough.

So far, the STTs and KM2s have been pretty similar in noice, traction, and ride--that is to say very good. Have not taken the KM2s off-road yet.

[SnakeH2]

Originally Posted by MarineHawk

I now have no rubbing at all ever. Also, and I cannot explain this at all: I constantly monitor my mpgs every day (just bored, I suppose). I had a local shop install the tires and wheels. I also had a new allignment and Royal Purple (had been using Mobile 1). I don't know which among those factors have strangely caused this, but I am getting somewhere between 0.5 and 0.7 better mpgs--consistently with the exact same driving patters. It makes no sense to me, but it's definitely gone up.

I've seen the same with the Royal Purple. I used it for everything and my increase was more along the line of 1.4

[cyclone53]

I JUST PUT ON MY 37X12.50'S AND I DO GET A SLIGHT RUB AT FULL LOCK, BUT NOT ENOUGHT TO BUG ME TOO MUCH. I LOVE THE LOOK THOUGH.

[h24bob]

like the look of those goodyears i guess its to early to tell how they stack up to the bfg ko,s nice rig as well like the color thanks for your input

[timgco]

....pics of my old truck

Try to stay with a 12.50 wide tire. 13.50 wil rub more on your swaybars and will have a better chance of taking out your rear airbag sensor (if you have air susp). I have wheeled a couple trucks with 37's/ pushed them hard. One truck had air susp. the other did not. The air. susp. truck, I hit the sensor due to a failed swaybar link (allowed more flex) and blew out teh bag. There is an air sensor mod you can do that works to solve that issue as well. ...not a bad idea to do anyhow.

37 12.50 17 BFG MT's on stock wheels

[h24bob]

rig has rear air suspension will definatley stick to 12.50 what is this mod you are talking about .i like the blacked out look on your rig those racks look great

[timgco]

Originally Posted by h24bob

rig has rear air suspension will definatley stick to 12.50 what is this mod you are talking about .i like the blacked out look on your rig those racks look great

http://www.elcovaforums.com/forums/s...&highlight=mod

...although I would go with a different bolt setup. I would make a metal sleeve to use as a spacer and than tighten a smaller headed bolt to the spacer so you don;t pinch the arm.