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Old 09-26-2006, 05:42 PM   #1
bigarmzz
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73-87's Tire / Lift size chart (WILL IT FIT?)

thought i'd see if i could start this thread for the 73-87's, since there's already one for the 67-72's

could we make "this one" a sticky too?

lots of 73-87 owners wanting to know this same question
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Old 09-26-2006, 07:27 PM   #2
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Re: 73-87's Tire / Lift size chart (WILL IT FIT?)

EXACTLY!!!!!!!!!

Man you are on a roll today, 2 great posts that I too would love to see answered.

I'll start I had 33x12.50x15 rim on my 86, no rubbing. I even hit some bad bumps off road while going for parts, no hitting or rubbing.

My front end supposedly had one leaf added from a blazer to make the front sit level with the rear sintead of slightly racked like factory.

Also with the 33's on and the tires straight, sitting you could see about an inch clearance on the tightest spot of the fender, the lowest corners, mainly the front was the tightest i think.

I have fender flares on the truck so that takes up about a 1/4 inch all the way around the fender well, due to their thickness, no trimming or anything.

Also my 33's mounted, truck weight on them and aired up to 35 psi are about 31 inches tall.
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Old 09-27-2006, 06:53 AM   #3
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Re: 73-87's Tire / Lift size chart (WILL IT FIT?)

Maybe,if there was an actual chart made,it could have columns for the different body-types.They never came up with a chart,did they?I`ll tell what I know with common sizes(prolly already know).I have 12.50/33s on my Blazer mounted on 10" rims.I had the front springs arched and a leaf added.I guess equal to Add-A-Leafs.It`s fine for street except a turn-in and up with a drastic angle change.I just do it carefully and never rub.I drive that way anyway to be kind to my vehicles.8" rims would work fine.
I have the exact same fit on my Suburban with a 4" lift and 12.50/35s on 10" rims and 8"rims would be fine.
The tires/wheels I`m running would clear fine for offroad with 2 more inches of lift:
12.50/33,10" wheels,4" lift
12.50/35,10" wheels,6" lift
Going to 14.50s or 12" rims would take you back to where you could rub with 4"&33s or 6"&35s.I`m not sure that 14.50s on 12" rims would require another 2" tp work at all:14.50/35 on 12" wheels might need 8"?Let`s see what others say.
BTW,good move,Bigarmz
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Old 09-27-2006, 07:43 AM   #4
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Re: 73-87's Tire / Lift size chart (WILL IT FIT?)

JUst make a post with guys trucks in it, with their specs.
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Old 09-27-2006, 05:48 PM   #5
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Re: 73-87's Tire / Lift size chart (WILL IT FIT?)

Ok I'll start, I have to find an original pic w/o the lift....

4 in. rough country lift, springs front, block in rear, 33 12.50x15rim AT's

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Old 09-27-2006, 06:14 PM   #6
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Re: 73-87's Tire / Lift size chart (WILL IT FIT?)

It is impossible to make a chart for this. I have seen it tried a hundred times. One guy will say 33s will fit with no lift, the next guy will say 33s will rub with a 4 inch lift. Actually, both of them are correct. There is too much variation in:

The actual lift heights of lift kits (they are also affected by what engine, tranny and accessories are on the truck)

The spring rates of aftermarket lift springs

The type of use that the vehicle sees

The actual size vs. advertised size of tires (tire width and wheel width also can make a huge difference)
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Old 09-28-2006, 12:15 PM   #7
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Re: 73-87's Tire / Lift size chart (WILL IT FIT?)

I agree but we'd like to see some options people have.

Like I have 4 inches+ clearance now and want to run like a 46 or 37, and I don't off road, however I have 33's now but they are only 31 inches tall aired up and truck on them.

So I could run right now a 4 inch bigger tire, but tires go 1/2 inch taller since they are round, basically that should mean an 8 inch or more tire bigger.

Basically what I mean if people don't understand is not only does it get closer to the body, but only half it's difference does, the other raises the axles off the ground.

Look at it this way, with my 31 inch 33's you have 15.5 inches going upwards above the axle if you will, and 15.5 going downwards from the axle.

In conclusion one inch taller tire in measurement meaning a 34 or 32 inches actual installed height, would equal 1/2 inch closer or 1/2 inch more in the wheel wells, with the same rim configuration.

Hope that's not too tech. or confusing.
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Old 10-01-2006, 08:43 PM   #8
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Re: 73-87's Tire / Lift size chart (WILL IT FIT?)

I have some new info,

got a buddy who has a 81-87 chevy swb stepside he is running the following...

Mickey thompson 36x14.50's on 15 x10 or12 inch wheels.

He has a 4 inch superlift suspesnion lift, blocks in back, springs in front, and a 3 inch body lift. he has a good 3 inches or more of clearance, I do have pics and will post later.
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Old 10-04-2006, 10:09 PM   #9
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Re: 73-87's Tire / Lift size chart (WILL IT FIT?)

4" Skyjacker lift, blocks in back, 35" x12:50 BFG All Terrain's with stock 8" rallies

no rubbing at all, in anyway
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Old 10-04-2006, 10:13 PM   #10
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Re: 73-87's Tire / Lift size chart (WILL IT FIT?)

6" Skyjacker lift with rear blocks, 35" Pro Comp Mud Terrains with 8" Eagle Alloy rims, the rims have 3 3/4" back spacing

of course, no rubby
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Old 10-04-2006, 10:16 PM   #11
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Re: 73-87's Tire / Lift size chart (WILL IT FIT?)

4" Skyjacker lift with rear springs
35" pro comp mud terrains with 8" eagle alloy wheels with 3 3/4" backspacing

no rubbing at all
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Old 10-04-2006, 10:18 PM   #12
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Re: 73-87's Tire / Lift size chart (WILL IT FIT?)

no lift, 33" apache all terrain tires on stock 8" rallies...no rubbing believe it or not
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Old 10-04-2006, 10:21 PM   #13
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Re: 73-87's Tire / Lift size chart (WILL IT FIT?)

4" superlift with rear blocks
33" all terrain tires
cheapo used 8" aluminum rims
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Old 10-04-2006, 10:25 PM   #14
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Re: 73-87's Tire / Lift size chart (WILL IT FIT?)

8" lift with rear blocks (forget the brand)
36x13:50 super swamper tsl radials
10" wheels
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Old 10-12-2006, 11:43 AM   #15
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Re: 73-87's Tire / Lift size chart (WILL IT FIT?)

My truck is just a stock 79 3/4 ton, but I have 285/75/16's on '06 HD wheels, and there is a ton of clearance and absolutely no rubbing. Does anyone know what I might be able to get under there with a 4 in lift?
By the way, bigarmzz, you have some nice trucks, I hope you have a big enough shop for all of them.
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Old 10-12-2006, 02:24 PM   #16
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Re: 73-87's Tire / Lift size chart (WILL IT FIT?)

Quote:
Originally Posted by bigpig72CST View Post
By the way, bigarmzz, you have some nice trucks, I hope you have a big enough shop for all of them.
thanks man, but these were all one's that i built one at a time....usually ended up selling them

i've currently only got one
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Old 10-12-2006, 05:31 PM   #17
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Re: 73-87's Tire / Lift size chart (WILL IT FIT?)

I am going to attempt to stuff 37x12.50R17 PC Xtreme All Terrains on mine, with 6" BDS suspension on 17x9" rims. It currently has 35" BFG A/Ts on it. I think for an extra 2" of tire diameter, with my clearance and the narrow rims I have it cleared ok.

(don't worry, I have already regeared)

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Old 10-12-2006, 06:51 PM   #18
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Re: 73-87's Tire / Lift size chart (WILL IT FIT?)

75 K5. Pics at various stages of my build:

No lift with 33x12.50 15's. No Rubbing


4" Rough country front springs, Echobit Shackle flip, 33x12.50 15's. Again no rubbage...



Same lift, new tires. 35x12.50 15's No rubbage still, flexed or turning.

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Old 10-15-2006, 01:49 PM   #19
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Re: 73-87's Tire / Lift size chart (WILL IT FIT?)

90 Suburban 3/4ton with 6inch Skyjacker suspension lift with 2 inch trailmaster rear add a leaf., 3 in Performance Accesories body lift.
38.5x15.5 Super Swamper radials on 16.5 x 12 American Eagle 589s
Front tires rub when turning and flexed.

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Old 10-15-2006, 01:57 PM   #20
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Re: 73-87's Tire / Lift size chart (WILL IT FIT?)

83 Chevy 6 inch Skyjacker lift with 3 in body lift 35x12.5 BFG MUD Terrains 8 inch wheel No rub
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Old 12-31-2006, 11:40 PM   #21
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Re: 73-87's Tire / Lift size chart (WILL IT FIT?)

How about 87'blazer with 4'' rancho lift 35x14.00x15 mickey thompson baja belted with 10'' wheels....will it clear?I know they are all differnt i have built several.but i have never tried 4"with 35"s.I seen 4" with 35/12.50 but not 14.00's.Never lifted a blazer either.they have all been 3/4 ton trucks.thanks for any help.
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Old 04-04-2007, 11:01 PM   #22
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Re: 73-87's Tire / Lift size chart (WILL IT FIT?)

i got 36x14.5x15 on a 79 with 0" lift



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Old 04-07-2007, 11:40 PM   #23
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Thumbs up Re: 73-87's Tire / Lift size chart (WILL IT FIT?)

9 inch lift with 40inch ground hawgs they fit great

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Old 05-05-2007, 10:22 AM   #24
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Re: 73-87's Tire / Lift size chart (WILL IT FIT?)

4" Superlift/Spring work&2" block on rear/35"BFG ATs/9.75x16.5 steelies on`84,never rubbed:

Spring shop arched and added leaf in front to level/33"BFG ATs/10"finned on`90,caught behind the front tires a bit.Never wheeled it:

4"TuffCountry EZ-Rides all 4/35"MTRs/10x16"D"holes on`91,caught behind the front tires if I wasn`t careful:
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Old 09-06-2007, 01:51 PM   #25
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Re: 73-87's Tire / Lift size chart (WILL IT FIT?)

THere is a chart that has already been printed it was in the Petterson's 4wheel drive mag, I have a copy at home I will take a look and see if I can find it. It out lines all of the tire sizes and what will need to be changed, lifts, steering arms, brake lines, you name it. I recently moved so I will have to do some digging.
In the mean time here is a lillte info I found on the net.
http://www.ramblerman.com/blazer/techinfo.htm
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