The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Want to install dual rear wheels on '66 K20

**Captainfab** · 06-07-2007, 01:17 AM

Putting duals on the rear shouldn't be a problem, providing the wheel studs are long enough. I don't remember if the C30 trucks of this vintage had the reinforcing ring on the rear wheels or not. That may be a factor in wheel stud length. Now for the front of your truck...you'll need to change the hubs to the dual rear wheel type in order to be able to use the dually type wheels. As for wheel size, the '66 C30 that I have, it had 16.5's on it before I got it. probably 6.5 or 7" wide, but I can't say for sure if they were original wheels or not.

06-07-2007, 01:17 AM	#2
Captainfab 60-66 Nut Join Date: Mar 2007 Location: Coeur d'Alene, Idaho Posts: 23,254	Re: Want to install dual rear wheels on '66 K20 Putting duals on the rear shouldn't be a problem, providing the wheel studs are long enough. I don't remember if the C30 trucks of this vintage had the reinforcing ring on the rear wheels or not. That may be a factor in wheel stud length. Now for the front of your truck...you'll need to change the hubs to the dual rear wheel type in order to be able to use the dually type wheels. As for wheel size, the '66 C30 that I have, it had 16.5's on it before I got it. probably 6.5 or 7" wide, but I can't say for sure if they were original wheels or not.