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Old 12-19-2012, 07:52 PM   #1
Marko3002
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New wheels!

Just ordered some new wheels today. Boss 338 chrome. 20x8.5 & 20x10's. Front tires are 255/35 & backs are 315/35. What do you you guys think? Will the back tires fit ok? Anyone running these on a 72 fleetside? Heres a before pic with the TT's. I'll post up some after pics next week when they're mounted. Sorry about the lousy pics. Anyone in the Phoenix area want a nice set of Torque Thrusts?
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Old 12-19-2012, 08:15 PM   #2
69GWC
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Re: New wheels!

Wow your changing the wheels? Truck looks awesome. The way it is.
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Old 12-19-2012, 08:28 PM   #3
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Re: New wheels!

What size and how much are the TT's ? By the way your PU looks great.
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Old 12-19-2012, 08:48 PM   #4
Zoomin
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Re: New wheels!

315's work fine. Very nice truck.
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Old 12-19-2012, 08:49 PM   #5
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Wink Re: New wheels!



I had to run a 1/4" spacer on the back to keep the tires from rubbing the inside of the fender. 8.5" on front and 10' on back.
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1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver
Seeing the USA in a 71


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Get out and drive the truck this summer and have some fun!
It sucks not being able to hear!

LWB trucks rule, if you don't think so measure your SWB!
After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs.
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Old 12-19-2012, 09:29 PM   #6
Marko3002
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Re: New wheels!

"Zoomin", you dont think they will be to wide? "Andy4639", what back spacing are your rears?
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Old 12-19-2012, 09:32 PM   #7
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Re: New wheels!

Nice truck! I might be partial to blue/white short beds though : )
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Old 12-19-2012, 09:57 PM   #8
Zoomin
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Re: New wheels!

Quote:
Originally Posted by Marko3002 View Post
"Zoomin", you dont think they will be to wide? "Andy4639", what back spacing are your rears?
At your current ride height, no. Is the back spacing the same between the Boss and TTII wheels? But if it were me, I wouldn't go larger than a 295 on a 10" wheel.
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Old 12-19-2012, 10:05 PM   #9
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Re: New wheels!

Dont know the backspacing on the old rims. I'll try and figure that out tomorrow. They mentioned we may have to go to a 295.

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Last edited by 70cst; 12-20-2012 at 11:06 PM.
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Old 12-20-2012, 08:53 AM   #10
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Re: New wheels!

I like your truck
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Last edited by 70cst; 12-20-2012 at 11:07 PM.
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Old 12-20-2012, 09:12 AM   #11
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Re: New wheels!

Pretty sure the 20x10 Boss wheel is a 6.25" backspace. With the 315, I'd say you might be a bit wide (?) (in too far, tucked under the truck a little bit) The tire is 12.4" wide.

Most run a 295/40/20 on a 20x10 with 5.5" BS on the 72 rear end housing. (fleetside)

It can be fixed with a maybe .75" spacer if you wanted but .. just sayin.
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Old 12-20-2012, 09:35 AM   #12
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Re: New wheels!

Very nice truck, I love the TTII's on it. Can't wait to see some updated pics with the new wheels.
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Old 12-20-2012, 05:06 PM   #13
Andy4639
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Wink Re: New wheels!

Quote:
Originally Posted by Marko3002 View Post
"Zoomin", you dont think they will be to wide? "Andy4639", what back spacing are your rears?
I don't remember but I will try and measure it this weekend.
__________________
1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver
Seeing the USA in a 71


Upstate SC GM Truck Club
2013,14 and 2016 Hot Rod Pour Tour


http://upstategmtrucks.com/



Get out and drive the truck this summer and have some fun!
It sucks not being able to hear!

LWB trucks rule, if you don't think so measure your SWB!
After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs.
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Old 12-20-2012, 05:42 PM   #14
Marko3002
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Re: New wheels!

Quote:
Originally Posted by CC69Rat View Post
Pretty sure the 20x10 Boss wheel is a 6.25" backspace. With the 315, I'd say you might be a bit wide (?) (in too far, tucked under the truck a little bit) The tire is 12.4" wide.

Most run a 295/40/20 on a 20x10 with 5.5" BS on the 72 rear end housing. (fleetside)

It can be fixed with a maybe .75" spacer if you wanted but .. just sayin.
The backspacing on the rear is 5.5". The guy from American Eagle said these rims have been retooled because of the high demand for them on these trucks and the older cars. He said they will bolt right on with no issues. I will let you know how that works out.
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Old 12-20-2012, 07:59 PM   #15
HotRod C/10
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Re: New wheels!

Quote:
Originally Posted by CC69Rat View Post
Pretty sure the 20x10 Boss wheel is a 6.25" backspace. With the 315, I'd say you might be a bit wide (?) (in too far, tucked under the truck a little bit) The tire is 12.4" wide.

Most run a 295/40/20 on a 20x10 with 5.5" BS on the 72 rear end housing. (fleetside)

It can be fixed with a maybe .75" spacer if you wanted but .. just sayin.
Mine are 5 1/2" BS.

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