How about 20's? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

skoffice · 02-07-2010, 01:10 AM

Hey guys I'm going to be running the CPP modular 2-1/2" drop spindles with 3" springs, maybe cut half a coil out as well. Will I be able to fit 20's with a 35 series tire under the inner fender without any rubbing issues?

protrash64 · 02-07-2010, 02:31 AM

I believe it will work. My 18's are about 26.5'' tall and I have a bit over an inch clearance. I think a 245/35/20 is about the same diameter. I would NOT cut the coil until you check your clearance

skoffice · 02-07-2010, 04:31 AM

That's what I was thinking, wait and see before I cut the coil. What kind of offset should I run up front for the best clearance? Wow only an inch huh? That's cuttin it pretty close!

protrash64 · 02-07-2010, 12:34 PM

I would run at least 5'' .......mine are 5.25''bs and my 20's were 5.5''bs. I had no rubbing issues.

skoffice · 02-07-2010, 02:31 PM

Sounds good to me. I'll probably go at least 5.25 depending on whats available then. What drop do you have?

Slammed66 · 02-07-2010, 03:34 PM

im running 20x8's with a 255/35/20 with zero rubbing issues, its ot 3 inch spindles and bags.

protrash64 · 02-07-2010, 05:02 PM

Quote:

Originally Posted by skoffice

Sounds good to me. I'll probably go at least 5.25 depending on whats available then. What drop do you have?

Exactly yours.......2.5'' spindle and 3'' coils.

skoffice · 02-07-2010, 10:52 PM

That sounds awesome. Thanks for the input guys! I was worried about ordering my wheels and tires and then come to find out "ah crap I'm rubbin!" Thats what I'm going to be running is probably 20x8 and 255 35. Out back I think I'm going 20x10 and 315 40 or something like that. Considering the Boss 338s or 336s in black.

protrash64 · 02-08-2010, 11:43 AM

Just wanted to add something I just thought about, too. I'm running conventional dropped spindles which widen the track width, about 3/4'' on each side. I'm not familiar with the specs on the modular spindles but you may want to check to see track width specs. If they do not widen track, then you may be able to run a little less backspacing.

I've heard there are fitment issues with the Boss wheels as they are for cars and do not fit the truck hubs as well. The issues can be overcome, but you may be doing some machine work or spacers to get 'em on. FYI.

skoffice · 02-08-2010, 01:14 PM

I was told when I bought these spindles they are supposed to bring track width inward 1/2" inch. Some redesigned spindle that you get to spend more money on

hmm I did not realize that with the boss wheels. If it's just a matter of machining the hub diameter that's no problem, but then again I haven't really done any research on these wheels yet. I'm sure someone on here has to have a set of 338's? Pretty simple, popular, torque thrust design..

Slow Build · 02-08-2010, 04:46 PM

Quote:

Originally Posted by skoffice

I'm sure someone on here has to have a set of 338's?

Here's a thread on that.

http://67-72chevytrucks.com/vboard/s...d.php?t=352320

02-07-2010, 01:10 AM	#1
skoffice Registered User Join Date: Apr 2007 Location: Elk Grove, CA Posts: 375	How about 20's? Hey guys I'm going to be running the CPP modular 2-1/2" drop spindles with 3" springs, maybe cut half a coil out as well. Will I be able to fit 20's with a 35 series tire under the inner fender without any rubbing issues? __________________ 1964 C10 Shortened Shortbed Cammed LQ9 P&P 1967 C10 Trophy Truck BB 438 (soon to be worked on again)

02-07-2010, 02:31 AM	#2
protrash64 Resistance is Futile Join Date: Dec 2006 Location: Mesa,Arizona Posts: 3,520	Re: How about 20's? I believe it will work. My 18's are about 26.5'' tall and I have a bit over an inch clearance. I think a 245/35/20 is about the same diameter. I would NOT cut the coil until you check your clearance __________________ 64 CHEVY PICK-UP > http://67-72chevytrucks.com/vboard/s...otrash+re-hash 64 CARRYALL >http://67-72chevytrucks.com/vboard/s...=1964+suburban 66 LB >http://67-72chevytrucks.com/vboard/s...d.php?t=427852 STRENGTH/DETERMINATION/MERCILESS/FOREVER .......posted via stationary device

02-07-2010, 04:31 AM	#3
skoffice Registered User Join Date: Apr 2007 Location: Elk Grove, CA Posts: 375	Re: How about 20's? That's what I was thinking, wait and see before I cut the coil. What kind of offset should I run up front for the best clearance? Wow only an inch huh? That's cuttin it pretty close! __________________ 1964 C10 Shortened Shortbed Cammed LQ9 P&P 1967 C10 Trophy Truck BB 438 (soon to be worked on again)

02-07-2010, 12:34 PM	#4
protrash64 Resistance is Futile Join Date: Dec 2006 Location: Mesa,Arizona Posts: 3,520	Re: How about 20's? I would run at least 5'' .......mine are 5.25''bs and my 20's were 5.5''bs. I had no rubbing issues. __________________ 64 CHEVY PICK-UP > http://67-72chevytrucks.com/vboard/s...otrash+re-hash 64 CARRYALL >http://67-72chevytrucks.com/vboard/s...=1964+suburban 66 LB >http://67-72chevytrucks.com/vboard/s...d.php?t=427852 STRENGTH/DETERMINATION/MERCILESS/FOREVER .......posted via stationary device

02-07-2010, 02:31 PM	#5
skoffice Registered User Join Date: Apr 2007 Location: Elk Grove, CA Posts: 375	Re: How about 20's? Sounds good to me. I'll probably go at least 5.25 depending on whats available then. What drop do you have? __________________ 1964 C10 Shortened Shortbed Cammed LQ9 P&P 1967 C10 Trophy Truck BB 438 (soon to be worked on again)

02-07-2010, 03:34 PM	#6
Slammed66 Needs a Big Block Join Date: Oct 2003 Location: Red Deer , Alberta Posts: 1,198	Re: How about 20's? im running 20x8's with a 255/35/20 with zero rubbing issues, its ot 3 inch spindles and bags. __________________ 1964 Short box On dropmembers and billets 1962 Suburban family cruiser 1972 K10

02-07-2010, 10:52 PM	#8
skoffice Registered User Join Date: Apr 2007 Location: Elk Grove, CA Posts: 375	Re: How about 20's? That sounds awesome. Thanks for the input guys! I was worried about ordering my wheels and tires and then come to find out "ah crap I'm rubbin!" Thats what I'm going to be running is probably 20x8 and 255 35. Out back I think I'm going 20x10 and 315 40 or something like that. Considering the Boss 338s or 336s in black. __________________ 1964 C10 Shortened Shortbed Cammed LQ9 P&P 1967 C10 Trophy Truck BB 438 (soon to be worked on again)

02-08-2010, 11:43 AM	#9
protrash64 Resistance is Futile Join Date: Dec 2006 Location: Mesa,Arizona Posts: 3,520	Re: How about 20's? Just wanted to add something I just thought about, too. I'm running conventional dropped spindles which widen the track width, about 3/4'' on each side. I'm not familiar with the specs on the modular spindles but you may want to check to see track width specs. If they do not widen track, then you may be able to run a little less backspacing. I've heard there are fitment issues with the Boss wheels as they are for cars and do not fit the truck hubs as well. The issues can be overcome, but you may be doing some machine work or spacers to get 'em on. FYI. __________________ 64 CHEVY PICK-UP > http://67-72chevytrucks.com/vboard/s...otrash+re-hash 64 CARRYALL >http://67-72chevytrucks.com/vboard/s...=1964+suburban 66 LB >http://67-72chevytrucks.com/vboard/s...d.php?t=427852 STRENGTH/DETERMINATION/MERCILESS/FOREVER .......posted via stationary device

02-08-2010, 01:14 PM	#10
skoffice Registered User Join Date: Apr 2007 Location: Elk Grove, CA Posts: 375	Re: How about 20's? I was told when I bought these spindles they are supposed to bring track width inward 1/2" inch. Some redesigned spindle that you get to spend more money on hmm I did not realize that with the boss wheels. If it's just a matter of machining the hub diameter that's no problem, but then again I haven't really done any research on these wheels yet. I'm sure someone on here has to have a set of 338's? Pretty simple, popular, torque thrust design.. __________________ 1964 C10 Shortened Shortbed Cammed LQ9 P&P 1967 C10 Trophy Truck BB 438 (soon to be worked on again)



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