How to tell the drop - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Jmann8686 · 04-03-2019, 12:19 PM

Bought a 72 C20 a few weeks back. It has been lowered. and I like the stance. I have not looked to much into it as of right now. But i was wondering if there was anyway to tell how much drop as been done to it as it sits right now. The frame has not been notched and there looks to be only about 1-1/2" to maybe 2" of travel before the axle hits the bump stop. Is there anything I can measure or should I look for part numbers. New to the lowered 2wd truck world.

Thanks

SCOTI · 04-03-2019, 06:22 PM

What size are the tires? That might help w/estimating drop.

Typically, if there is ~2" between the factory rear bump-stop & the axle on a 1/2 ton truck, I would say it's around 4" drop. If it's a 3/4 ton, the drop could be more since they were taller from the start.

Jmann8686 · 04-03-2019, 10:27 PM

Quote:

Originally Posted by SCOTI

What size are the tires? That might help w/estimating drop.

Typically, if there is ~2" between the factory rear bump-stop & the axle on a 1/2 ton truck, I would say it's around 4" drop. If it's a 3/4 ton, the drop could be more since they were taller from the start.

It is a c20 so it’s the 3/4 ton. The tires are 245/75r16

SCOTI · 04-03-2019, 10:40 PM

Quote:

Originally Posted by Jmann8686

It is a c20 so it’s the 3/4 ton. The tires are 245/75r16

Looked like a 3/4 ton but I didn't want to assume. That tire combo is ~30.5" tall so possibly a 2/4 drop.

Jmann8686 · 04-03-2019, 11:03 PM

Quote:

Originally Posted by SCOTI

Looked like a 3/4 ton but I didn't want to assume. That tire combo is ~30.5" tall so possibly a 2/4 drop.

Awesome. Thank you for the info.

Jmann8686 · 04-03-2019, 11:33 PM

Quote:

Originally Posted by SCOTI

Looked like a 3/4 ton but I didn't want to assume. That tire combo is ~30.5" tall so possibly a 2/4 drop.

Awesome. Thank you for the info.

04-03-2019, 12:19 PM	#1
Jmann8686 Registered User Join Date: Mar 2019 Location: Selah, Washington Posts: 7	How to tell the drop Bought a 72 C20 a few weeks back. It has been lowered. and I like the stance. I have not looked to much into it as of right now. But i was wondering if there was anyway to tell how much drop as been done to it as it sits right now. The frame has not been notched and there looks to be only about 1-1/2" to maybe 2" of travel before the axle hits the bump stop. Is there anything I can measure or should I look for part numbers. New to the lowered 2wd truck world. Thanks Attached Images

04-03-2019, 06:22 PM	#2
SCOTI Registered User Join Date: Apr 2001 Location: DALLAS,TX Posts: 22,064	Re: How to tell the drop What size are the tires? That might help w/estimating drop. Typically, if there is ~2" between the factory rear bump-stop & the axle on a 1/2 ton truck, I would say it's around 4" drop. If it's a 3/4 ton, the drop could be more since they were taller from the start. __________________ 67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... *Cubic inches is like Indiana Jones with a cheap pistol.*



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