How do i measure . Help please - The 1947 - Present Chevrolet & GMC Truck Message Board Network

bbobb · 02-22-2016, 02:30 PM

I need a formula on how to measure for a static drop lowering kit for my 72. Any help would be appreciated

**SoCoC10** · 02-22-2016, 06:04 PM

There is a thread on this site titled "Let's see your static drops" loaded with pics. I can tell you the DJM rear flip kit I put on a 69 GMC with leaf springs tells you to measure from the wheel/hub center to the fender lip. I ended up with 5-5 1/2" drop.
When guys say truck is lowered 7" front 10" rear they are full of s%*t. They are measuring from the ground up and are going from 235/75/15 tires to 245/45/20s. Take your time, do your research and buy once. Good luck.

bbobb · 02-22-2016, 07:38 PM

Thanks for the reply. I will try this in the morning

69chevy lwb · 02-22-2016, 11:44 PM

I think your facts are a bit misleading on tire size. There is a 0.2" different between the two tire sizes you mentioned. Also you can static drop the truck a half inch off the ground if your little heart desires. It would be the world's most useless truck but the ground is the limit for lowering.

bbobb · 02-23-2016, 11:04 AM

Quote:

Originally Posted by 69chevy lwb

I think your facts are a bit misleading on tire size. There is a 0.2" different between the two tire sizes you mentioned. Also you can static drop the truck a half inch off the ground if your little heart desires. It would be the world's most useless truck but the ground is the limit for lowering.

All i am trying to to is lesson the gap between the tires and lip of the fender.

Mike C · 02-24-2016, 10:04 AM

The measurement you want is from the center of the hub to straight up to the bottom of the fender.

Wheel and tire size can affect the ground clearance as well as the height of the roof from the ground but don't have anything to do with how much you lowered the suspension.

On my 69 short step the 2 1/2" drop spindles and 2" ECE small block springs lowered it almost exactly 4 1/2".

And FWIW, the DJM flip on my 5 leaf HD spring C10 dropped my truck 7". On a leaf truck not just the arch of the spring but the thickness of the leaf pack contributes to how much it's lowered based on how high it was to begin with.

02-22-2016, 02:30 PM	#1
bbobb Registered User Join Date: Oct 2011 Location: El Lago Tx Posts: 95	How do i measure . Help please I need a formula on how to measure for a static drop lowering kit for my 72. Any help would be appreciated __________________ 69 C10 long box All factory 55 Lincoln Capri 50 Buick Hardtop sled 30 Tudor sedan

02-22-2016, 06:04 PM	#2
SoCoC10 Senior Member Join Date: Nov 2014 Location: Colorado Posts: 3,303	Re: How do i measure . Help please There is a thread on this site titled "Let's see your static drops" loaded with pics. I can tell you the DJM rear flip kit I put on a 69 GMC with leaf springs tells you to measure from the wheel/hub center to the fender lip. I ended up with 5-5 1/2" drop. When guys say truck is lowered 7" front 10" rear they are full of s%*t. They are measuring from the ground up and are going from 235/75/15 tires to 245/45/20s. Take your time, do your research and buy once. Good luck. __________________ 07' Extcab Silverado Z71 Silver Birch, 5.3L HO 71' Cheyenne C10 Hugger Orange on Saddle SWB Besides these two, too Many to count

02-22-2016, 07:38 PM	#3
bbobb Registered User Join Date: Oct 2011 Location: El Lago Tx Posts: 95	Re: How do i measure . Help please Thanks for the reply. I will try this in the morning __________________ 69 C10 long box All factory 55 Lincoln Capri 50 Buick Hardtop sled 30 Tudor sedan

02-22-2016, 11:44 PM	#4
69chevy lwb Registered User Join Date: Mar 2012 Location: Evanston Posts: 304	Re: How do i measure . Help please I think your facts are a bit misleading on tire size. There is a 0.2" different between the two tire sizes you mentioned. Also you can static drop the truck a half inch off the ground if your little heart desires. It would be the world's most useless truck but the ground is the limit for lowering. __________________ My Patinia'd 69 69-http://67-72chevytrucks.com/vboard/showthread.php?t=517537 My RHD 68 http://67-72chevytrucks.com/vboard/s...d.php?t=594928

02-24-2016, 10:04 AM	#6
Mike C Registered User Join Date: Dec 1999 Location: Austin, TX, USA Posts: 7,723	Re: How do i measure . Help please The measurement you want is from the center of the hub to straight up to the bottom of the fender. Wheel and tire size can affect the ground clearance as well as the height of the roof from the ground but don't have anything to do with how much you lowered the suspension. On my 69 short step the 2 1/2" drop spindles and 2" ECE small block springs lowered it almost exactly 4 1/2". And FWIW, the DJM flip on my 5 leaf HD spring C10 dropped my truck 7". On a leaf truck not just the arch of the spring but the thickness of the leaf pack contributes to how much it's lowered based on how high it was to begin with. __________________ 44 Willys MB 52 M38A1 64 Corvette Coupe 68 Camaro 'vert LT1 & TH700 69 Z/28 355 12.6's @110 69 Chevy Short Step 4 1/2"/7" drop 72 Jimmy 4WD 4spd 4" & 35's 02 GMC 2500HD 4x4 Duramax

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