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305, 373s and a trailer

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by OhioJimmy, Jun 21, 2000.

  1. OhioJimmy

    OhioJimmy Registered Member

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    My 86 Jimmy has a 305 with 373s and I pull a tandem axle trailer regulary, It seems to have plenty of power and I really don't know the trailer is back there even though it weighs a ton itself. Heres my question, can I put bigger tires on and the 305 still keep pace, I hate those little tires in those huge fender wells, they are stock size can't remember off the top of my head. or do you guys have any suggestions for me, a new motor is out this year, just moved and have to buy mamma a house. Thanks in advance,

    If you say you haven't been stuck you're lying or was it you'll go blind, hmm
     
  2. Bigd

    Bigd 1/2 ton status

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    Do you have any freinds that have the tire size you looking too put on.If so ask him too let you borrow them for a couple of days and give it a try.No money lost except may the cost of a few beers.
     
  3. OhioJimmy

    OhioJimmy Registered Member

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    Unfortunately nobody I know runs tires of any size I only want to go to 31s or so just to fill that fender well a bit but it was a good idea, thanks

    If you say you haven't been stuck you're lying or was it you'll go blind, hmm
     
  4. Can Can

    Can Can Pusher Man Staff Member Super Moderator

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    My 84 came with 31/10.5/15s and I tow a 2600lb trailer. I have the 305 too, and don't have too much trouble except on really steep mountain passes(I sometimes have to drop into 2nd during a long climb). The 31s definitely fill the fender wells up a bit more. Did your rig come with 15" tires from the factory, or did you buy it like that?
     
  5. 90K5

    90K5 1/2 ton status

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    Canmore K5 I hope you meant 15" wheels. 31's will fill them out a lot better . I think the stock size is like a 235 and I think ive seen them on S10s so 31s will be a big improvement.
     
  6. Can Can

    Can Can Pusher Man Staff Member Super Moderator

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    Tires......wheels........you know what I meant!
     

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