a question to those with big diameter torq thrust II... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

miller6t9 · 01-06-2017, 09:07 PM

just wondering if those with the large diameter TT IIs (17, 18, 20) have custom offset or are they off the shelf wheels?...been doing a lot of looking and not many put the offset and backspacing of their wheels out there.

Mike C · 01-06-2017, 09:17 PM

Most are off the shelf. A zero offset wheel works best on both ends of these trucks usually. My wheels are 5 lug legend 5 spoke and not Torque Thrusts, but 17x8 front with 4.5" backspace and 17x9 rear with 5" backspace.

Backspace measured from the outside of the wheel while wheel width measured between the beads. So an 8" wide rim is approximately 9" wide outside to outside, thus a 4.5" backspace has the mounting surface almost centered resulting in a zero offset. Meaning the mounting surface flange neither pushed to the front or rear.

68racer · 01-07-2017, 03:40 PM

I had custom 18x8.5's made for the rear as off the shelf had too much backspace.

01-06-2017, 09:07 PM	#1
miller6t9 Registered User Join Date: Aug 2009 Location: Rockingham, nc Posts: 166	a question to those with big diameter torq thrust II... just wondering if those with the large diameter TT IIs (17, 18, 20) have custom offset or are they off the shelf wheels?...been doing a lot of looking and not many put the offset and backspacing of their wheels out there.

01-06-2017, 09:17 PM	#2
Mike C Registered User Join Date: Dec 1999 Location: Austin, TX, USA Posts: 7,715	Re: a question to those with big diameter torq thrust II... Most are off the shelf. A zero offset wheel works best on both ends of these trucks usually. My wheels are 5 lug legend 5 spoke and not Torque Thrusts, but 17x8 front with 4.5" backspace and 17x9 rear with 5" backspace. Backspace measured from the outside of the wheel while wheel width measured between the beads. So an 8" wide rim is approximately 9" wide outside to outside, thus a 4.5" backspace has the mounting surface almost centered resulting in a zero offset. Meaning the mounting surface flange neither pushed to the front or rear. __________________ 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

01-07-2017, 03:40 PM	#3
68racer Yeah baby! Join Date: Feb 2001 Location: United Kingdom Posts: 436	Re: a question to those with big diameter torq thrust II... I had custom 18x8.5's made for the rear as off the shelf had too much backspace. __________________ 11.37 @116



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