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Heavy tires vs 4-bangers

Discussion in '4 Cylinder' started by hutch606, Aug 23, 2011.

  1. hutch606

    hutch606 [OP] Well-Known Member

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    Who's running real AT tires (50ish lb tires) on their 4-bangin' 4wd trucks (I'm access cab, MT)? 95% of my miles are on-road, but the extra 5% can pretty much suck. I've been a huge fan of old-school BFG ATs, but not sure if the lil' 4cylinder can handle it without just losing all power / mileage. So, any comments?
     
  2. Hayes

    Hayes Well-Known Member

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    What size are you looking to add? That's where the biggest difference is going to take place. If you stick with the stock size, are you getting E rated tires (10 ply)? If you keep the air down to a sultry 35 psi or so, it shouldn't make a huge difference. The weight will be a bit higher, but the rolling resistance will be roughly the same. If you go larger, it might suck more because you get weight and rolling mass (diameter)... Depends on what you are looking for. Personally, a mildly aggressive (read: Hankook Dynapro AT-M tire in a slightly larger size (read: 265/75r16) would be well worth the trade off. My girlfriend has those on her Jeep and they hook up really well, coupled with the fact that I have sold hundreds of sets of those with good on road reviews as well... That would be worth a slight sacrifice.
     
  3. Hard

    Hard Well-Known Member

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    I just went through this myself. I put 235/85R16's on my stock steel wheels. These are the same diameter as the 265/75R16's but are narrower. The tires I put on were 49LBS. This tire change took away 2-3 MPG and put my truck in a different power-spot for normal driving. It really drove me nuts. I "returned" the tires and got Michelin AT's in the stock size.

    I have had larger tires in the past and my last two sets of tires were BFG AT KO. I didnt feel that this truck with the 4banger was very forgiving with the larger tires.

    Lots of others are running larger tires and seem to have no problem. I felt the engine had enough power to do what I wanted, but I felt as though I was taxing the engine all the time with the 32" tires. The truck would go as fast as I wanted when i wanted, eventually, but I was down a gear if I wanted to have any acceleration at all.

    YMMV
     
  4. Hayes

    Hayes Well-Known Member

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    Hard and Hutch, you can regear to compensate for the loss in power. It's expensive up front, but everything we do to these trucks is expensive...
     
  5. 97yota4wd

    97yota4wd Well-Known Member

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    ill be running 78 lb general grabber red labels. (33x12.5x15) but im re gearing to 4.56
     
  6. Ridgerunner

    Ridgerunner Well-Known Member

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  7. bendbolden

    bendbolden Come and take them.

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    None but soon......
    I have the BFG All Terrains 265/75/16 on mine and they seem to do fine. I bought the truck with them on it so I can't say how it was before.
     
  8. hutch606

    hutch606 [OP] Well-Known Member

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    Thanks for the replies. I'm not looking to go any larger, but wanted to know about going from a 35lb tire to 51. I know it won't improve power and mpg but curious if I'd hate myself for doing it. Thanks Hard for your take...
     
  9. Hard

    Hard Well-Known Member

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    I would say you will notice a little difference but your truck will be geared properly with the stock size. The tires im running now are 46lbs, but the stock size, and i really like the power and ride. An aggressive tire in the stock size is all I will be using without a re-gear.
     
  10. RogerRZ

    RogerRZ Well-Known Member

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    I run load range E Safari TSR in the stock size, and with a couple of hundred miles a day (my 4 1/2 month old truck is going to turn 20k miles next week) worth of hilly logging roads, I'm averaging 19.75mpg, and have very seldom wanted more power--that's what the stick shift is for...
     
  11. JTacoma

    JTacoma Well-Known Member

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    I went from a 225/75/15 (28'') to Michelin A/T 31'' tires on my 2.7 Tacoma. I don't know how much of a weight difference there was but I only felt a slight difference driving. The larger tires actually lowered highway rpms and after the deckplate mod I am getting better mileage than when I had the smalled tires. You shouldn't have a problem with your 4 banger.
     
  12. TacomaJack09

    TacomaJack09 Well-Known Member

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    I run 31" BFG KO's and my truck runs them fine. They was a set when I bought the truck so I don't have any comparison. But I can tell it's bogged down slightly, going from worn down BFG's to brand new ones. You will tell a slight difference. I still get great MPG's though!!
     
  13. 08pretaco

    08pretaco Almost there

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    im runnined 255/85/16 cooper st with moto metal 951. wheels weigh 20-30lbs more for all 4. the coopers iirc i read somewhere they are around 45-50lbs. I am over-geared to 4.56 and i am getting 24 mpg, 75% freeway 25% city

    so were talking close to 100 lbs more in rotation mass and im fine, truck hauls balls for a 4 banger
     
  14. Allen9621

    Allen9621 Active Member

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    Seeing as you only gain 1/2" of usable ground clearance for every 1" of tire height, I don't think larger-than-stock tires are worth it unless one truly needs that clearance.

    The 2.7L is just not up to the task when you push its capacity. I think it's a good balance of MPG to practical power but it's "underpowered" in comparison to many vehicles. Even the 4.0 V-6 will suffer driveability loss - you just don't feel it as much. The physics of rotating a larger tire mass and diameter can't be escaped, even with gear ratio matching. Most people seem to do it for looks over utility.
     
  15. hutch606

    hutch606 [OP] Well-Known Member

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    Thanks for the input. As mentioned, no plans to go big, just retaining stock 245/75/16 tires; no need/desire for anything more. It was helpful hearing input on the 30% heavier tire. Thanks much!
     
  16. jspadaro

    jspadaro Well-Known Member

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    You didn't say if you were a 5-lug, but since you say you have a stock size of 245, I'll assume you're a prerunner or 4x4.

    I did notice drag moving up to duratracs in 265/75 (they're approx 45lbs a tire I think). It was still certainly driveable. The 4.10 gearing you have helps a lot, you'll be fine.
     
  17. silverback

    silverback Well-Known Member

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    255/75/17 firestone destination A/T on Fj cruiser wheels. Reg cab with the bil 5100 all four corners and front set at 1.75' . look real clean. Ill have to post some pics see what you guys think. noticed a slight drop in power and mpg but it looks good!
     
  18. Tepidy

    Tepidy Well-Known Member

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    I have 265 75 16's bfg mud terrains (KM2's) on mine and its fine. At some point when I have an extra $1500.00 hanging around I will re-gear to 4.56's
     
  19. 00PreRunner

    00PreRunner Well-Known Member

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    Nothing yet. Just getting started.
    Manual tranny?
     
  20. 4Wheelin4Banger

    4Wheelin4Banger Longtime Toyman

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    You could also go TRD stock size 265/70/16 if you want to go wider (0.78") but not taller.
    I'll be going taller (1.18") & wider (0.78") 265/75/16 when I get my new tires.
     
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