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Att. Tire guru's.

Discussion in 'The Garage' started by Z3PR, Feb 3, 2006.

  1. Z3PR

    Z3PR Banned

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    Here's the deal, my 78 El Camino needs new tires. Currently it has 4 different size tires on it. (Like that when I bought it.) Anyways, the best looking tire on it is a P235/60R14. I'm going to a 16x8 rim. So I'll need a tire in a 16 that is simular to the P235/60R14. I plan on running the same size tire on all 4 corners. I like the wide look. So, what do y'all recomend ??? Was going too use a 15" rim, but with planned breaks upgrade, I'll need too use a 16" wheel.
     
  2. sweetk30

    sweetk30 professional hooker Premium Member

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    i would pop on a few tire sites and use the calc or tire facts to find the same size and width info. 245/??/16 tire. not sure on the second set of #s as a few might work.
     
  3. dave_90_blazer

    dave_90_blazer 1/2 ton status

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  4. b454rat

    b454rat 1/2 ton status Premium Member

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    235/60/14s are WAAAAYYYY too small!!!I ran a couple different tire combo's on the 10 different G-body's that I've owend. 1 car had 15s, 8s rear 7s front. 236/60 and 205/65. Last one had Vette Ralley's 8s rear 4s front, 255/60 (275 will fit) and skinny's up front. Another one had 16s, 8s and 7s, with 235/55 and 225/55. I would go with 225/55 up front and a 255/60 on the rear. Call the manufacture of whatever rim you choose, and tell them what you want to run. They can tell you what B/S to run. The last combo was on a lowered car, so no issues with clearance.
     
  5. Z3PR

    Z3PR Banned

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    I need too run the same size tire all the way around. I do not want different size in the front from the rears. Must be the same size tire all the way around. Keep in mind, the front will sit lower as soon as the 427 Big Block gets dropped in. I want the widest tire that can be used on a 16x8 rim, that won't rub when trurning. I kind of like a lower profile tire, but I don't want a rubberband sidewall.
     
  6. Mudbone

    Mudbone Registered Member

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    Strictly from a math stand point:

    P235/60R14 Tire with is 235mm. Side wall height is 60% of width.
    235 mm x .6 = 141 mm

    Tire diameter is wheel diameter + 2 x Side wall height.
    141 mm x 2 = 282 mm, 11.1 inches (1 inch = 25.4 mm)
    11.1 + 14 = 25.1 inches

    Now in reverse.
    Side wall height is (diameter of tire - diameter of wheel) / 2
    25.1 inches - 16 inches (new wheel diameter) = 9.1 inches, 231.1 mm
    231.1 mm / 2 = 115.55 mm

    Desired tire width is 235 mm.
    Desired side wall height is 115.55 mm.
    Desired wheel diameter is 16 inches.

    Percent representation of side wall height.
    (115.55 mm / 235 mm) x 100 = 49.17 round up to 50

    New size is written as P235/50R16.
    Assuming such a thing exists.
     
  7. b454rat

    b454rat 1/2 ton status Premium Member

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    How are you gonna drive this with that small a tire? When you put it in gear it will spin the tires. Why don't you want to run diff size tires?? The front I can understand, BBCs are a little heavy in these cars. I had 255/60s on my car, and I got ZERO traction!! If you must use the same size, then I would use 7s, 8s would look goofy, and probly a 225 or 215/50. What are the specs on this car?? Hope yo don't plan on running Hooker Super Comps. I had alum heads on my car, so it didn't do a nosedive, and the headers hang really low. Say you are gonna run these, with the weight of the motor, small front tires, and the headers hanging low, they WILL hit anything and everything in the road. Forget speed bumps. Then when you hit a bump, they will get bashed to ****.
     
  8. dave_90_blazer

    dave_90_blazer 1/2 ton status

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    umm....
    225 or 215/ 50 16s are the same diameter or smaller then the 235/60R16 several of us have recommended, and the 235 is a little wider the the 225 or 215(235/225/215 is section width, in the same brand, it can be used as a experssion of the mm width of the tread)
     
  9. Z3PR

    Z3PR Banned

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    Why do I want too run the same size tire all the way around ??? If you rotate your tires every other oil change they will last longer. The rims I want come in a 16x8, (with 4" rear spacing) but not a 16x7. I don't want too go up to 17, 18, 19, 20, ...ect. 16X8 is the smallest Centerline makes in the rim I want. Right now the El Camino is all stock with tired suspension. I plan on using the Hotchkis Preformance Suspension TVS (Total Vehicle System). The 427 will be mild, 10 to 1 compression, it will have DART alum heads, and a alum intake manifold, I'm thinking the 280 grind Magnum series hydrolic flat tappet cam from Comp Cams. Trans will be a 700r4, and rear end will be posi with 3.73 gears. This will not be a race car, just a street car. I highly doubt I'll be burning the tires off constantly, I've grown out of that kind of behavior. Just because you have the power too roast the tires, doesn't mean you have too at every stop light, LOL.
     
  10. dyeager535

    dyeager535 1 ton status Premium Member

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    Not to take your post off on a tangent, but I peaked at the TVS kit, have you looked around at other options? (I love A/G bodies BTW :))

    The heavy duty front sway bar can be had off a Camaro, thicker even the largest GM used on the performance G-bodies, stock rears are pretty common, two different sizes of those, you can get the front frame "triangulation" pieces from the various makes of the cars, you can box the rear control arms yourself, etc.

    You mentioned the brakes you are intending to use require 16" wheels, you going with the 12" b-body stuff with global west a-arms? (think that was the company) The del-alum bushings for the control arms are a huge improvement as well. Can't recall the Moog part number for better springs, but the monte-carlo list has gone over this stuff in depth. JMD is the guy I'd be looking for posts from regarding the suspension stuff.

    Can't wait to get my car done, but the truck takes precedence. :(

    Sounds like a fun car.
     
  11. Z3PR

    Z3PR Banned

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    Ben doing some pricing. The 235/50-16 are not a cheap tire. Infact, I haven't found many companys that list them. How close to that would a 235/55-16 be ?? I've found alot more of those at a way better price.
     
  12. Z3PR

    Z3PR Banned

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    Okay, how about a 245/50-16 ??? I can get a pretty good deal on the Bridgestone Potenza G009 in that size. I run the G009's on the Alero, and I like them alot.
     
  13. dyeager535

    dyeager535 1 ton status Premium Member

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    I think you'll just have to do some research to see what people have been able to fit.

    Just like with the trucks, width is a factor, but so is height at a point. A 235 50 might clear certain components in the wheelwell due solely to the 5% height difference between it and a 235 55.

    IIRC 235's are pretty much pushing it. The ones sitting on my car are 225 60R15's, and they don't rub, but they are close. They work out almost identical to the 195/75R14 that was the "base" tire for these cars, as does your 235 50. This little comparison calculator is kinda neat, just found it. http://www.1010tires.com/TireSizeCalculator.asp

    Still, width is going to be a factor as much as height.
     

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