largest diameter/width with a 3/5 or 4/6 drop - The 1947 - Present Chevrolet & GMC Truck Message Board Network

coggonobrien · 09-26-2008, 08:14 AM

Just wondering what the largest tire diameter and width available to fit under a shortbox 2wd with either a 3/5 or 4/6 drop. backspacing and pics would be nice. I'm half tempted to tub it for 12" rear's too.

Thanks!
Dave

Ackattack · 09-26-2008, 09:56 AM

I have 315/35/20s on mine with airbags and a small notch (stock bed floor) I tubbed the wheel wells, but I have a lot of room left. I'm running 20x10 wheels in the back (larger than 10" wide wheels, I was told, are REALLY expensive)

72BLKCHEYENNE · 09-26-2008, 11:31 AM

Hey there Coggonobrien,
I went with an Early classic drop of 4/5. The rims I have are Torque Thrust II's 18x8 4.5" back space 5x5 bolt pattern in the front and 20x10 5.5" back space in the rear. Tires are BFG G-Force KDW-2 255/45R18 in the front and 285/55R20 in the rear. In my opinion front tires are too small but BFG does not make a higher profile tire in the 255/R18. The rear is another story the tires were rubbing a bit on the inside so I put a 1/4" spacer to solve that problem. Also I only have about 1/4" clearance on the fender ahead of the rear tire. Rear tires look great but I wish I would have went with the 6" drop in the rear. I hope this helps.......Rick

09-26-2008, 08:14 AM	#1
coggonobrien Registered User Join Date: Mar 2008 Location: Coggon, IA Posts: 580	largest diameter/width with a 3/5 or 4/6 drop Just wondering what the largest tire diameter and width available to fit under a shortbox 2wd with either a 3/5 or 4/6 drop. backspacing and pics would be nice. I'm half tempted to tub it for 12" rear's too. Thanks! Dave

09-26-2008, 09:56 AM	#2
Ackattack Senior Member Join Date: Aug 2002 Location: Valley Center KS Posts: 3,525	Re: largest diameter/width with a 3/5 or 4/6 drop I have 315/35/20s on mine with airbags and a small notch (stock bed floor) I tubbed the wheel wells, but I have a lot of room left. I'm running 20x10 wheels in the back (larger than 10" wide wheels, I was told, are REALLY expensive) __________________ Project Bruiser: 68 Pro-Touring C-10 5.3L / 4L60E Project Ironhide: 97 GMC Crew Cab 4x4 Cummins SOLD: '69 GMC 1/2T SWB TBI'd: Project No Buck Assembly Manual Index Sign up Thread!!! Factory Service Manual Index

09-26-2008, 11:31 AM	#3
72BLKCHEYENNE Registered User Join Date: Oct 2005 Location: FREDERICTON, NEW BRUNSWICK CANADA Posts: 130	Re: largest diameter/width with a 3/5 or 4/6 drop Hey there Coggonobrien, I went with an Early classic drop of 4/5. The rims I have are Torque Thrust II's 18x8 4.5" back space 5x5 bolt pattern in the front and 20x10 5.5" back space in the rear. Tires are BFG G-Force KDW-2 255/45R18 in the front and 285/55R20 in the rear. In my opinion front tires are too small but BFG does not make a higher profile tire in the 255/R18. The rear is another story the tires were rubbing a bit on the inside so I put a 1/4" spacer to solve that problem. Also I only have about 1/4" clearance on the fender ahead of the rear tire. Rear tires look great but I wish I would have went with the 6" drop in the rear. I hope this helps.......Rick



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