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95 K2500 tire/gearing question

Discussion in '1992-Present Chevy & GMC models' started by BillyBob535, Jun 22, 2003.

  1. BillyBob535

    BillyBob535 Registered Member

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    Location:
    Swansboro, NC
    I am looking at buying a 95 K2500. It has a 454/4L80/241 and has 3.73 gears. The current tires are 31.6" tall on the stock 16" rims.

    I like the truck but I really didn't want a 454. The current owner says it gets 14mpg on the highway.

    I was thinking of running a slightly larger tire to drop the rpms a bit in an attempt to improve the mpg a little. I was wondering if anyone here has a similar non-lifted truck with the same gears and motor and oversize tires on the stock rims? What size tires are you running?

    The truck will be used as a DD and occasionally drive on the beach so it does not need a lot of room for articulation. I have looked around and it seems that a 33" tire is about the biggest you can go on a non-lifted truck. Do you think these would be a good choice (I will probably go with a BFG TA KO)?

    Thanks
     
  2. 89K1500Chevy

    89K1500Chevy 1/2 ton status

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    some 285/65/R16 would be the biggest while sitting stock but if you dont want that 454 you could always swap in a small block and send the big block to me.....
     
  3. willyswanter

    willyswanter 1/2 ton status GMOTM Winner

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    My K3500 has the vortec 454 and stock it had 4.10 gears and 31" tires. I was getting around 16-18 on the freeway. Now I get 8 /forums/images/graemlins/grin.gif
     
  4. u2slow

    u2slow 1/2 ton status

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    Maybe look into the 255/85R16 size. About the same height as the 285/75R16, but since its a little narrower, its easier to turn and might improve the savings.

    14mpg is excellent economy with a 454 /forums/images/graemlins/thumb.gif
     
  5. sled_dog

    sled_dog 1 ton status

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    I have the same setup you just mentioned except mines a 350 and 4.10s, I wish I had a 454. I get 10mpg around town and highway mixture.
     
  6. BillyBob535

    BillyBob535 Registered Member

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    If I buy the truck, I may run the 454 until it dies and then swap in a small block.

    What are the best ways to improve mileage on a truck like this?
     
  7. HarryH3

    HarryH3 1 ton status Author

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    I've got a '94 Sub with a 350, 3.73's and 275/75R16's. It gets 14 MPG on the highway. So 14 MPG with a 454 seems like a pretty big stretch to me... /forums/images/graemlins/wink.gif 10 is much closer to what I've heard from most 454 owners. /forums/images/graemlins/eek.gif
     

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