Maximum front tire size for my drop? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**KyleSeal** · 10-21-2017, 11:55 PM

I'm getting close to the driving part of my build on my truck. I am running a 5.5 drop in the front and a 7 inch drop in the back. Whats the biggest tire size I can run and still have full turning range? I will be running factory 4 nub 15 inch rims.

Thanks, and yes I know that drop with 15 inch rims is extreme but its what I want so please stick to a tire size discussion.

**HO455** · 10-22-2017, 05:18 PM

I have 245/60/15's on my bagged Burban and with that amount of drop I don't have any rubbing issues. Before I reinstalled front bump stop (PO removed them) I would rub at max turn but it wasn't very bad.
The first photo is my currrent max drop with new bags and bumpstops. The second photo is of the old set up showing max drop. Third photo is the of the old drop and my first bump stop experiment. I think the bump stop is 1 3/8" high in the last photo for comparison.

Mruss70 · 12-13-2017, 03:23 PM

I have a 68 c10 that I am building. I am trying to find out what the widest tire and wheel I can put on the front and back. My 2013 GMC has 275/55/20 and that’s what I would like but I don’t know about rubbing. I have the 5 lug on the 68 that came off of a 72 Chevy front and back. Any help would be appreciated figuring out if the 275/55/20 will fit on the 68 Chevy.
Posted via Mobile Device

demian5 · 12-13-2017, 05:04 PM

I have a 3" drop and run 31 10.50x15, no issues, but I'm not as low as you.

10-21-2017, 11:55 PM	#1
KyleSeal Senior Member Join Date: Mar 2014 Location: Toano, VA Posts: 893	Maximum front tire size for my drop? I'm getting close to the driving part of my build on my truck. I am running a 5.5 drop in the front and a 7 inch drop in the back. Whats the biggest tire size I can run and still have full turning range? I will be running factory 4 nub 15 inch rims. Thanks, and yes I know that drop with 15 inch rims is extreme but its what I want so please stick to a tire size discussion. __________________ "Sometimes I do serve as a good bad example. Glad to be of service." My Build Thread (1967 C10, lowered, EFI, daily truck): http://67-72chevytrucks.com/vboard/s...d.php?t=830809

10-22-2017, 05:18 PM	#2
HO455 Post Whore Join Date: Feb 2016 Location: Portland Oregon Posts: 11,350	Re: Maximum front tire size for my drop? I have 245/60/15's on my bagged Burban and with that amount of drop I don't have any rubbing issues. Before I reinstalled front bump stop (PO removed them) I would rub at max turn but it wasn't very bad. The first photo is my currrent max drop with new bags and bumpstops. The second photo is of the old set up showing max drop. Third photo is the of the old drop and my first bump stop experiment. I think the bump stop is 1 3/8" high in the last photo for comparison. Attached Images __________________ Thanks to Bob and Jeanie and everyone else at Superior Performance for all their great help. RIP Bob Parks. 1967 Burban (the WMB),1988 S10 Blazer (the Stink10 II),1969 GTO (the Goat), 1970 Javelin, 1952 F2 Ford OHC six 4X4, 29 Model A, 72 Firebird (the DBP Bird). 85 Alfa Romeo If it breaks I didn't want it in the first place The WMB repair thread http://67-72chevytrucks.com/vboard/s...d.php?t=698377

12-13-2017, 03:23 PM	#3
Mruss70 Registered User Join Date: Dec 2017 Location: Granbury, Texas Posts: 6	Re: Maximum front tire size for my drop? I have a 68 c10 that I am building. I am trying to find out what the widest tire and wheel I can put on the front and back. My 2013 GMC has 275/55/20 and that’s what I would like but I don’t know about rubbing. I have the 5 lug on the 68 that came off of a 72 Chevy front and back. Any help would be appreciated figuring out if the 275/55/20 will fit on the 68 Chevy. Posted via Mobile Device

12-13-2017, 05:04 PM	#4
demian5 Registered User Join Date: Aug 2016 Location: Lake Forest, CA Posts: 2,177	Re: Maximum front tire size for my drop? I have a 3" drop and run 31 10.50x15, no issues, but I'm not as low as you. __________________ "Work hard, use your vacation days." 1970 C15 GMC Long Bed 1986 C20 Scottsdale 1983 K2500 Sierra Classic Suburban 6.2 Instagram: C10sofOC

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