Tire / Lift size chart 67-72 (WILL IT FIT?)
 

This is for 67-72 trucks / blazers based on my personal and collected info from other members.

33's require no lift on 8 inch and sometimes 10 inch wheels. (depends on backspacing for the wider wheels. 4 is best for wheeling.

35's require a minimum of 4 inches (show queen). 6 is best for wheeling.

36's require a minimum of 4 inches (show queen). 6 is best for wheeling.

37's require a minimum of 6 inches (show queen). 8 is best for wheeling.

38's require a minimum of 8 inches (show queen). 10-12 is best for wheeling.

40's require a minimum of 10 inches (show queen). 12+ is best for wheeling.

chime in if you run something larger.


All info is based on actual measured sizes OD, not stamped sizes. IE 40 inch hawgs are really closer to 38's and 38.5 hawgs are really closer to 36's. Parnelli Jones 38's are actually 38.2. I think you get the idea.

Stock fenders with no trimming also.

Re: Tire / Lift size chart (WILL IT FIT?)
 

Do we need to add tire widths to this chart? Like some 38"s are only 12.50" {TSL's} and some are 15.50". My question is what would be the best rim width for a 37x14.50.15"? Thanks a lot for the chart.

Re: Tire / Lift size chart (WILL IT FIT?)
 

My guide would be using wide sizes already factored in. IE I run a 38x15.50 with 9 inches. I think best rim width would be a different thread. (although I would use a 10-12 inch rim)

Re: Tire / Lift size chart (WILL IT FIT?)
 

Rim off-set or backspacing is not the only factor in the larger tires. Rim width itself can make a difference in diameter. As it has been stated, the tire size printed on the tire is generally an exaggerated number. The typical 38-40-42-44 inch tires will measure about 2 inches smaller when mounted on a 10" wheel. Although it sounds backward, when you mount the 40" and up tires onto a 12" or 14" wheel.......they will get bigger. Most people think that stretching these tire onto wider wheels will shorten them. Actually the 10" wheels are squeezing them. When they are opened-up on bigger wheels, they will grow.....sometimes as much as the 2" that they were short in the first place. When you go this route, you will have more off-set. You cannot get a wheel that wide centered on the hub surface, they would hit the steering gear and would shorten your turning radius because they hit the springs while turning if you could make them fit. So you have effectively gained two problems at the same time..........larger diameter and more off-set. If you use wider wheels you will have to have more clearance/lift, especially if you off-road your truck.

Re: Tire / Lift size chart (WILL IT FIT?)
 

33's with 2in lift is ok for all around use, right? I was planning on putting add-a-leafs on my truck with 285s. Right now it has 32's on 17" lockrim wheels
(7.00x17). No rubbing whatsoever. (Maybe because theyre 4-5inches wide :lol:)

Re: Tire / Lift size chart (WILL IT FIT?)
 

36 TSLs on my '72 hit the backs of the fenders under compression, when at or near steering lock. Enough to 'massage' the fenders ;) I have a 6" stiffy lift ( can't remember what lift it was, but its pretty stiff - ala superlift)

-Marty

Re: Tire / Lift size chart (WILL IT FIT?)
 

Here is some more info for ya all. I recently installed 37"x13.50"x17" on my 67' with 4" springs and 1 1/2" longer shackles.Maybe 5"-5.5" of lift total. I have no bed on the truck. The tires rubbed the fender hook it front of the front tire.I sawzall'd about a 1 1/2" triangle off that corner and they don't rub at all except under extreme flex. I mean with 1 tire at least 36" off the ground
on a ramp. Then it rubs very little behind the front tire.This is when the wheel is strait.Under full lock it does not rub the fenders only my rock sliders :o .

Re: Tire / Lift size chart (WILL IT FIT?)
 

I've read before that you can measure the distance across the tread section of the tire, & get a rim that size or the closest size smaller. Supposedly this is the right way to do it.

Re: Tire / Lift size chart (WILL IT FIT?)
 

What about 44inch boggers

Re: Tire / Lift size chart (WILL IT FIT?)
 

ok. I am going to get an 8" suspension lift (skyjacker soft ride). and am gonna put 1" zero rate add a leafs in the read to not only correct saggy but, but also relocate the axle to where it should be in the fenderwell. am also going to be putting new body mounts, while im in there will be putting in a 1" body lift. just because 1" wont be bad, and ill be in there anyway.

my question is. with a total of 9" front and 10" rear. do you think i will be ok to run 39.5-13.5-16 Irock radials?

I do not want to do ANY cutting whatsoever.

Re: Tire / Lift size chart (WILL IT FIT?)
 

Nathan... I would tell you that it would work.... but I am not 100% sure.... I used to have around 9 - 10 lift that fit 37's fine... but I upgraded to 42's and had to trim the front just a bit.... you might be fine. Trevor

Re: Tire / Lift size chart (WILL IT FIT?)
 

If you trim but still maintain the original lines of the fenders route. ;)

Some additional clearance can be gained but not as much as you might think.
The inner fenders then become the issue.
2"/3" larger tire is all you'll get for your efforts with same lift numbers.

Re: Tire / Lift size chart (WILL IT FIT?)
 

Great topic but does anyone know about the 73-87's?

I ran 33's stock on it with no trimming, no hitting offroad either. Now I have a four inch lift and would like to run some 36-38 inch tires on it. With that being said maybe it's a good thing some are overrated, meaning I can buy 38's and they be listed as such but actually be smaller then 38 and work better.

Re: Tire / Lift size chart 67-72 (WILL IT FIT?)
 

I have 33x10.5x15 on 15x8 rims and they work great. PA is strict on not having tires outside the fenders so i went this route. No lift on a 68 K-10...

http://picasaweb.google.com/hawkdriv...SWBK104WDTruck

Re: Tire / Lift size chart 67-72 (WILL IT FIT?)
 

I had a 6 inch super comp lift and have 35x 15.50x15 TSL Swampers and they hit on a hard turn to left or right. I didnt want to cut either so I have since went with a ORD Rear shackle flip with 4 inch drop and 4 inch Sky jacker spring in the rear with a 8 inch Lift in the front with the heavy duty Front Shackles from ORd in the front. Its is Fine now and with the shackle flip it rides way better night and day difference.

Re: Tire / Lift size chart 67-72 (WILL IT FIT?)
 

So you guys running 6+ in lift, what kind of driveline issues or mods did you run into? I'd really like to run a 37x12.50, but I don't need driveshaft issues when wheeling....

Re: Tire / Lift size chart 67-72 (WILL IT FIT?)
 

33x15.5x16.5 on 16.5x12 w/ 3.5 back spacing will rub at full turn w/ 2.5" front/2" rear lift. 4" of lift will work perfect.
http://www.dieselplace.com/forum/gar...9&d=1176671090

Re: Tire / Lift size chart 67-72 (WILL IT FIT?)
 

I am running a tuff country 6" spring lift, on a 72 K20, dana 60 front, 14 bolt rear. 38-13-16 TSL's on a 16 x 8 wheel with 4.5 " backspace, front fenders are trimmed up front even with the bottom of the core support, no other trimming done, and tires just barely rubbed the rear of the back wheel well openings( like rubbed the paint off only), under extreme flexing while doing some rock crawling in an old river bed. this with a set of very soft springs, with a little trimming, it should never rub.

Re: Tire / Lift size chart 67-72 (WILL IT FIT?)
 

sorry Long Hair but i have to disagree the narrower the rim the taller the tire (tried and tested with a set of 37'' super swampers)

Re: Tire / Lift size chart 67-72 (WILL IT FIT?)
 

i got a skyjacker 6in with procomp 37's
it only eats a little bit of the fender under full articulation, but with that lift i got no chance of fully buying the tire in teh tire well..
they are on 16in rims x10 and 12.50 wide,
the mickey t 38 a15.50's rubbed my suspension and inner wells alot i hated them tooo big

Re: Tire / Lift size chart 67-72 (WILL IT FIT?)
 

am am having a hard time trying to decide how much lift to go with. My 71 super custom 3/4ton has a 4" lift and I put a on a set of bald 36/12.50/16 TSL's a buddy had and they rubbed the front fender like crazy. The tire I want to run is a 35/14.50 bogger would 6 inch's be enough or would 8 inch's be better. I have the ORD shackle flip on the way so the rear would be at 8 inches already?

Also how wide of rim and backspacing would you recomend for the 35/14.50?

Re: Tire / Lift size chart 67-72 (WILL IT FIT?)
 

I`d go with 8" if you want full suspension cycle up front.It`s the width that called for it.I`d run regular old 10" rims.I used to run 14.50/37s on 10 rims and that was fine.It`s about like running 12.50s on 8" rims.

Re: Tire / Lift size chart 67-72 (WILL IT FIT?)
 

I have this same set up on the wifes truck 16.5 x 12 w. 3.5 in BS still rubbed when you turn on 73-87. Were you doing this on a diff gen truck?

Re: Tire / Lift size chart 67-72 (WILL IT FIT?)
 

19.5-44/16 interco bogger on 16 x16 real wheels . about 30 inches of lift.

Re: Tire / Lift size chart 67-72 (WILL IT FIT?)
 

so this forum suggests that a 33x12.50R15 will fit on a stock K10 with an eight inch wide wheel? I haven't tried it on mine yet but from appearances it doesn't look like there would be that much room. There is LT235/75R15 on it now and I would love to be able to go up to the 33" any more input from anyone?

Re: Tire / Lift size chart 67-72 (WILL IT FIT?)
 

bump, anyone

Re: Tire / Lift size chart 67-72 (WILL IT FIT?)
 

thanks....

Re: Tire / Lift size chart 67-72 (WILL IT FIT?)
 

I fit 42" swampers with only 6" lift. The way it was done was to relocate the front springs 4" forward by making a custom front spring perch, using 73+ springs and relocating the rear shackle hanger forward about 2 inches. I fabbed the shackle hanger out of 11 gauge plate and 1.75 tubing. Bushings are originally used in spring eyes. The hard part of the lift is trimming the fenders. Here's my hack / attempt.

hmm, maybe this should be in it's own post but I put it here to demonstrate that you don't have to get a nose bleed sized lift to run large tires. Lower center of gravity is safer too!!

Re: Tire / Lift size chart 67-72 (WILL IT FIT?)
 

I have a 71 K5 with a 4'' susp and 2'' body lift
My 36x15.50 Parnelli jones stuff just about right
And the "look" is also pretty good, for ME

some flex on a small ramp

heres how it sits
http://i223.photobucket.com/albums/d...d/S4024263.jpg

Re: Tire / Lift size chart 67-72 (WILL IT FIT?)
 

Okay so we know what fits but when it doesn't how much cutting and where!

For example I'd like to run 38X12.5's on my 1st gen with just 6" of suspension lift. I plan on wheeling it as hard as I need to. Seems like I might get away with just a little bit of cutting but where and how much is the real question?

The "chart" in the first reply in the thread would be good to see for all size tires by lift.

Like:

38's w/4" = cut 1" off the front and XX off the rear
38's w/6" = cut 2" off the front andd xx off the rear


I guess we'd need to know if we need to cut 2" off the front and 2" off the rear or the FRONT

How high up do you need to trim the 2" up to as well.
What about the inner fender...

geez this is complicated!


FYI: the guy 2 posts before this has a GREAT example of what to chop off!

Re: Tire / Lift size chart 67-72 (WILL IT FIT?)
 

BIG HEAD....Holy___, what is that thing in the pics? a truck?!?!

Re: Tire / Lift size chart 67-72 (WILL IT FIT?)
 

...

Re: Tire / Lift size chart 67-72 (WILL IT FIT?)
 

this may be the wrong thread to post this in but its semi-related so i will ask anyway
my 68 k10 has 31x10.5x15's on it and i was hoping to put 38's on the truck by the time next summer rolls around, i am pretty shure my truck has some form of lift in it, all i know for certain is that its not blocked and it doesnt have a body lift, i was told that the rear leaf pack isnt a halfton pack and looks to be 3/4 ton or larger and my front leaf packs are from a 79 blazer, i found that writen on the springs, would those leaf packs add a lift? and how long are the original 68 shackles? cause the ones i have look homemade?
any help would be greatly apreciated
thanks
nate
http://i183.photobucket.com/albums/x...2/IMG_0137.jpg
http://i183.photobucket.com/albums/x...2/IMG_0171.jpg
one of the front shackles is visible behind the homemade rockwell 221 fill tube
http://i183.photobucket.com/albums/x...2/IMG_0142.jpg
this picture shows my rear leaf packs, ive never seen another 68k10 in person so these may be stock but a couple people i know said they are not factory for the truck, aslo can anyone tell me if this axle is anything special? its a 12 bolt 4.10 posi
http://i183.photobucket.com/albums/x...2/IMG_0129.jpg

Re: Tire / Lift size chart 67-72 (WILL IT FIT?)
 

my 68 fit my 33's with suuuuupppper tired springs i recently hacked my fenders myself, I've got plans for 38's in the near futere ; )

Re: Tire / Lift size chart 67-72 (WILL IT FIT?)
 

[IMG]http://i115.photobucket.com/albums/n...a/Image094.jpg[/IMG]

the rear looks like a dana....

here is my 68, but its a 3/4... looks totally different

[IMG]http://i115.photobucket.com/albums/n...Image041-1.jpg[/IMG]

mine is on 33's... very very minimal rubbing... not even a problem.. but they are bald...

dodge cummins wheels, lol