Largest tire/wheels on a stock ride height 72 K5 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

tjsblazer · 03-30-2010, 11:55 AM

I have a 72 Blazer 4wd with a 4 inch susp lift. I want to remove it and return to the stock ride height. What is the largest rim/tire combo I can use. I'm thinking about using 15" Chev truck rally rims. I'm guessing that 32" x 11.5 on 15's would be the largest. What are you stock susp guys running?

SeventyOne · 03-30-2010, 04:12 PM

When I bought my Blazer it had 33x12.50x15 (pretty sure they were 15x10 wagon wheels with maybe 3.5" BS) and they worked fine on stock worn out suspension.

Backspacing and how worn out the springs will play into what you can run.

I would stick with the 32's to be safe.

**lks dcvn** · 03-30-2010, 04:15 PM

I think the blue blazer I am building has 33s on it right now [but I would have to check to be certain] with stock suspension.

bouncytruck · 03-30-2010, 04:47 PM

I've always heard that 33's will fit on a stock ride, but keep in mind, the actual tire diameter may be different than the size. I've seen 35" that are closer to 33" tall and some closer to 37" tall.

Blazer1970 · 03-30-2010, 05:21 PM

You can run 33 X 12.50s as long as you don't twist up the suspension on the trails. 33s will rub with a 4 inch lift if you flex the suspension close to maximum.

tjsblazer · 03-30-2010, 06:02 PM

This Blazer won't be offroading, at least not bad enough to worry about twisting. Do GM truck rally rims come in a variety of offsets or are they all the same?

MT300RUM · 03-30-2010, 06:49 PM

Ive got 33,12.50s on mine right now and it's all stock, havent had it rub yet..

What are you going to do with the old lift??? All spring? or spring & block?

Cap'n Hook · 03-30-2010, 09:04 PM

33x12.50 here also, stock suspension.

**Steven B** · 03-31-2010, 10:36 AM

33/12.50 on the Jimmy. I don't do any off roading either.

Firebirdjones · 03-31-2010, 01:03 PM

I run 33 x 10.5's (BFG all terrains) on ours with a 15 x 8 aluminum wheel and it's just fine with stock ride height on original suspension.
We do some mild trail riding around the mountains here, but I generally don't care to take the truck anywhere it might bottom out or scrape, so we stick to the mild stuff. It's 99% a daily driver though.
Never had an issue with rubbing.

skidder111 · 03-31-2010, 01:54 PM

Some time ago I ran 31x10.50 on stock rallys with a saggy old suspension on mine. There was no issue. With a 4" lift now, it has 305 -70/16. BTW, where are you located? Cheers.

tjsblazer · 03-31-2010, 10:46 PM

Quote:

Originally Posted by MT300RUM

Ive got 33,12.50s on mine right now and it's all stock, havent had it rub yet..

What are you going to do with the old lift??? All spring? or spring & block?

Lift is front springs with rear blocks. I'm not going to use them anymore so ill be selling but it will be a couple of months before I get them out. If your interested I can keep it in mind.

tjsblazer · 03-31-2010, 10:50 PM

Quote:

Originally Posted by skidder111

Some time ago I ran 31x10.50 on stock rallys with a saggy old suspension on mine. There was no issue. With a 4" lift now, it has 305 -70/16. BTW, where are you located? Cheers.

Way east of you. I'm in southwestern Ontario.

tjsblazer · 03-31-2010, 10:55 PM

So it looks like quite a few people are running 33's on stock suspension. I'm looking for pics of stock suspension rides running GM truck rally rims. If anyone could post that would be great. Cheers.

OARNGESI · 04-01-2010, 04:24 AM

Heres mine 33x12.5x15 stock suspension with rallies

tjsblazer · 04-01-2010, 08:51 AM

Quote:

Originally Posted by OARNGESI

Heres mine 33x12.5x15 stock suspension with rallies

Looks great! Are the rims 8 or 10 inch wide? Like the color too, is that the factory bronze?

Firebirdjones · 04-01-2010, 09:38 AM

Here are a couple of mine, out on the trail and at home. Not factory ralley's but same or similar offsets.
I actually plan to locate a set of factory steel wheels (dog dish hubcap style) in 15 x 8's and paint them white for a different look. Hope this helps.

OARNGESI · 04-01-2010, 09:38 AM

There 8s the color is copperhead pearl

BLUE THUNDER · 04-01-2010, 09:42 PM

Not rallys, but here's mine before the lift.

cwilkie · 04-19-2016, 11:12 PM

How do you remove a 4 inch lift! Just buy stock leaf springs and shocks? I have a 1972 blazer that is lift which I want to return to stoc height. Any help is appreciated.

03-30-2010, 11:55 AM	#1
tjsblazer Registered User Join Date: Oct 2009 Location: Great White North Posts: 1,520	Largest tire/wheels on a stock ride height 72 K5 I have a 72 Blazer 4wd with a 4 inch susp lift. I want to remove it and return to the stock ride height. What is the largest rim/tire combo I can use. I'm thinking about using 15" Chev truck rally rims. I'm guessing that 32" x 11.5 on 15's would be the largest. What are you stock susp guys running? __________________ Jeff. '72 Blazer K5 "Camshaft opinions are like belly buttons; everyone has one and no two are alike" My Blazer Build: http://67-72chevytrucks.com/vboard/s...d.php?t=626752 My Engine Build: http://67-72chevytrucks.com/vboard/s...d.php?t=637336

03-30-2010, 04:12 PM	#2
SeventyOne Registered User Join Date: Mar 2007 Location: Oakland, Ca Posts: 1,372	Re: Largest tire/wheels on a stock ride height 72 K5 When I bought my Blazer it had 33x12.50x15 (pretty sure they were 15x10 wagon wheels with maybe 3.5" BS) and they worked fine on stock worn out suspension. Backspacing and how worn out the springs will play into what you can run. I would stick with the 32's to be safe.

03-30-2010, 04:15 PM	#3
lks dcvn Registered User Join Date: Jan 2007 Location: Columbus, Ohio Posts: 4,338	Re: Largest tire/wheels on a stock ride height 72 K5 I think the blue blazer I am building has 33s on it right now [but I would have to check to be certain] with stock suspension.

03-30-2010, 04:47 PM	#4
bouncytruck SKINNY TIRES RULE! Join Date: Sep 2001 Location: Bothell, WA Posts: 11,049	Re: Largest tire/wheels on a stock ride height 72 K5 I've always heard that 33's will fit on a stock ride, but keep in mind, the actual tire diameter may be different than the size. I've seen 35" that are closer to 33" tall and some closer to 37" tall. __________________ bouncytruck 1972 K5 The Hauler 1994 K1500 Suburban The Daily2010 Kia Soul Wife's Ride2014 Fiat 500L

03-30-2010, 05:21 PM	#5
Blazer1970 Registered User Join Date: Dec 1999 Location: Old Mission, MI, USA Posts: 2,510	Re: Largest tire/wheels on a stock ride height 72 K5 You can run 33 X 12.50s as long as you don't twist up the suspension on the trails. 33s will rub with a 4 inch lift if you flex the suspension close to maximum. __________________ Tim

03-30-2010, 06:02 PM	#6
tjsblazer Registered User Join Date: Oct 2009 Location: Great White North Posts: 1,520	Re: Largest tire/wheels on a stock ride height 72 K5 This Blazer won't be offroading, at least not bad enough to worry about twisting. Do GM truck rally rims come in a variety of offsets or are they all the same? __________________ Jeff. '72 Blazer K5 "Camshaft opinions are like belly buttons; everyone has one and no two are alike" My Blazer Build: http://67-72chevytrucks.com/vboard/s...d.php?t=626752 My Engine Build: http://67-72chevytrucks.com/vboard/s...d.php?t=637336

03-30-2010, 06:49 PM	#7
MT300RUM Registered User Join Date: Mar 2010 Location: Kalispell Montana Posts: 73	Re: Largest tire/wheels on a stock ride height 72 K5 Ive got 33,12.50s on mine right now and it's all stock, havent had it rub yet.. What are you going to do with the old lift??? All spring? or spring & block?

03-30-2010, 09:04 PM	#8
Cap'n Hook Workin to live... Join Date: Jun 2003 Location: Texas Hill Country Posts: 261	Re: Largest tire/wheels on a stock ride height 72 K5 33x12.50 here also, stock suspension. __________________ Jason

03-31-2010, 10:36 AM	#9
Steven B Senior Member Join Date: Jan 2000 Location: LHC, AZ Posts: 385	Re: Largest tire/wheels on a stock ride height 72 K5 33/12.50 on the Jimmy. I don't do any off roading either. __________________ 70 Jimmy 4x4 71 GMC 2500 Too bad stupidity isn't painful

03-31-2010, 01:03 PM	#10
Firebirdjones Registered User Join Date: Oct 2009 Location: Prescott, Arizona Posts: 2,396	Re: Largest tire/wheels on a stock ride height 72 K5 I run 33 x 10.5's (BFG all terrains) on ours with a 15 x 8 aluminum wheel and it's just fine with stock ride height on original suspension. We do some mild trail riding around the mountains here, but I generally don't care to take the truck anywhere it might bottom out or scrape, so we stick to the mild stuff. It's 99% a daily driver though. Never had an issue with rubbing.

03-31-2010, 01:54 PM	#11
skidder111 Registered User Join Date: Jan 2008 Location: Pincher Creek, Alberta, Canada Posts: 140	Re: Largest tire/wheels on a stock ride height 72 K5 Some time ago I ran 31x10.50 on stock rallys with a saggy old suspension on mine. There was no issue. With a 4" lift now, it has 305 -70/16. BTW, where are you located? Cheers.

03-31-2010, 10:55 PM	#14
tjsblazer Registered User Join Date: Oct 2009 Location: Great White North Posts: 1,520	Re: Largest tire/wheels on a stock ride height 72 K5 So it looks like quite a few people are running 33's on stock suspension. I'm looking for pics of stock suspension rides running GM truck rally rims. If anyone could post that would be great. Cheers. __________________ Jeff. '72 Blazer K5 "Camshaft opinions are like belly buttons; everyone has one and no two are alike" My Blazer Build: http://67-72chevytrucks.com/vboard/s...d.php?t=626752 My Engine Build: http://67-72chevytrucks.com/vboard/s...d.php?t=637336

04-01-2010, 04:24 AM	#15
OARNGESI Registered User Join Date: Sep 2008 Location: CASA GRANDE AZ Posts: 4,276	Re: Largest tire/wheels on a stock ride height 72 K5 Heres mine 33x12.5x15 stock suspension with rallies Attached Images __________________ 70 SWB STEPSIDE 70 BLAZER 09 challenger

04-01-2010, 09:38 AM	#17
Firebirdjones Registered User Join Date: Oct 2009 Location: Prescott, Arizona Posts: 2,396	Re: Largest tire/wheels on a stock ride height 72 K5 Here are a couple of mine, out on the trail and at home. Not factory ralley's but same or similar offsets. I actually plan to locate a set of factory steel wheels (dog dish hubcap style) in 15 x 8's and paint them white for a different look. Hope this helps.

04-01-2010, 09:42 PM	#19
BLUE THUNDER Registered User Join Date: May 2007 Location: San Antonio Posts: 993	Re: Largest tire/wheels on a stock ride height 72 K5 Not rallys, but here's mine before the lift. Attached Images



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04-19-2016, 11:12 PM	#20
cwilkie Chance Join Date: Sep 2001 Location: Belcourt ,ND, USA Posts: 750	Re: Largest tire/wheels on a stock ride height 72 K5 How do you remove a 4 inch lift! Just buy stock leaf springs and shocks? I have a 1972 blazer that is lift which I want to return to stoc height. Any help is appreciated. Attached Images __________________ 1968 Chevrolet Stepside BB 396 w/TH400 1972 Chevrolet 3/4 Ton 4x4 BB 496 w/TH400

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