wheels space question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Pizzalovr36 · 09-11-2011, 10:00 AM

will a 10 in wheel with a 3 and 3/4 backspace fit a stock 1970 stepside without going outside of the fender?

CC69Rat · 09-11-2011, 05:15 PM

I have a stepper too and feel your pain. It's tough to find the 'right' wheel and know it will fit.

Check out 'Percy's Wheelrite' You can buy them at Summit, Jegs, etc. $69.95 but if you're going to put some money into wheels and tires (?) This is the best thing I have ever found to measure backspacing and wheel / tire size.

To answer your question above, I'm thinking no. I currently have 8" truck rallys on my truck with a 255/70/15 and it's right on the edge. (in my build thread) An 8" truck rally wheel has 4.25" backspacing I believe (?) On mine I laid the wheel and tire face down and used a straight edge across the widest point of the tire (the 'puffed out' part) You'll want to measure from the widest point of the tire (section width) to the mounting point of your wheel where it meets the hub. My truck and current wheel / tire combo is 5". I have about 3/4" clearance to the point the tire would rub the besdide.

* You may know? * Wheel backspacing is measured from the mounting point of the wheel to the outside of the wheel edge. The maximum width of the wheel from where it mounts, back. Ex. a 10" wheel is actually about 10.5" wide. The wheel itself is measured from the inside-to-inside of the tire bead. Where the tire meets the wheel.

So, with a 10" wheel and 3.75" back I don't think it will work and not go past the wheel lip. I have my step fenders off my truck and laid one flat on the garage floor to simulate the bedside if that makes sense. From the groun to the widest point of the wheel lip was 11.5" or so. Depending on the height of your truck (lowered?) and the size of the tires .. My vote is no.

Also, something else to note is the earlier build trucks have a narrower rear axle. Mine is 55.5" wide plate to plate. The later rear ends are 57" wide. If you have a later rear end you can add .75" to my measurements.

Hope this helps .. Chad

CC69Rat · 09-11-2011, 05:15 PM

Visual ..

09-11-2011, 10:00 AM	#1
Pizzalovr36 Registered User Join Date: Jul 2010 Location: Pennsylvania Posts: 87	wheels space question will a 10 in wheel with a 3 and 3/4 backspace fit a stock 1970 stepside without going outside of the fender?

09-11-2011, 05:15 PM	#2
CC69Rat Registered User Join Date: Jan 2011 Location: Chattanooga TN Posts: 6,210	Re: wheels space question I have a stepper too and feel your pain. It's tough to find the 'right' wheel and know it will fit. Check out 'Percy's Wheelrite' You can buy them at Summit, Jegs, etc. $69.95 but if you're going to put some money into wheels and tires (?) This is the best thing I have ever found to measure backspacing and wheel / tire size. To answer your question above, I'm thinking no. I currently have 8" truck rallys on my truck with a 255/70/15 and it's right on the edge. (in my build thread) An 8" truck rally wheel has 4.25" backspacing I believe (?) On mine I laid the wheel and tire face down and used a straight edge across the widest point of the tire (the 'puffed out' part) You'll want to measure from the widest point of the tire (section width) to the mounting point of your wheel where it meets the hub. My truck and current wheel / tire combo is 5". I have about 3/4" clearance to the point the tire would rub the besdide. * You may know? * Wheel backspacing is measured from the mounting point of the wheel to the outside of the wheel edge. The maximum width of the wheel from where it mounts, back. Ex. a 10" wheel is actually about 10.5" wide. The wheel itself is measured from the inside-to-inside of the tire bead. Where the tire meets the wheel. So, with a 10" wheel and 3.75" back I don't think it will work and not go past the wheel lip. I have my step fenders off my truck and laid one flat on the garage floor to simulate the bedside if that makes sense. From the groun to the widest point of the wheel lip was 11.5" or so. Depending on the height of your truck (lowered?) and the size of the tires .. My vote is no. Also, something else to note is the earlier build trucks have a narrower rear axle. Mine is 55.5" wide plate to plate. The later rear ends are 57" wide. If you have a later rear end you can add .75" to my measurements. Hope this helps .. Chad __________________ Chad 1967 C10 SWB - Project Savannah - 6.0/4L80 Currently underway 1968 C10 SWB - TOTY 2018, 50th Anniversary Tribute Project * Sold * Pride and Joy 1986 Silverado Short Fleet - Scarlet Sold 1985 Silverado Short Fleet Sold 2022 Jeep Gladiator Mojave 2001 Jeep Cherokee XJ 4x4 - Lifted, Built 1992 Jeep Cherokee XJ 4x4 - Lifted 2013 Honda Accord EX-L v6 Coupe 6spd (wife's ride)

09-11-2011, 05:15 PM	#3
CC69Rat Registered User Join Date: Jan 2011 Location: Chattanooga TN Posts: 6,210	Re: wheels space question Visual .. Attached Images __________________ Chad 1967 C10 SWB - Project Savannah - 6.0/4L80 Currently underway 1968 C10 SWB - TOTY 2018, 50th Anniversary Tribute Project * Sold * Pride and Joy 1986 Silverado Short Fleet - Scarlet Sold 1985 Silverado Short Fleet Sold 2022 Jeep Gladiator Mojave 2001 Jeep Cherokee XJ 4x4 - Lifted, Built 1992 Jeep Cherokee XJ 4x4 - Lifted 2013 Honda Accord EX-L v6 Coupe 6spd (wife's ride)



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