![]() |
Register or Log In To remove these advertisements. |
|
|
![]() |
|
Thread Tools | Display Modes |
![]() |
#1 |
Roto Reuter thats the name...
![]() Join Date: Feb 2010
Location: Darien, NY
Posts: 1,853
|
Another C20 8-lug wheel question.
I don't want to highjack Rupdog's recent 8-lug wheel post, so I'm posting a new thread hoping someone can help.
I want to increase the stance on my '69 C20 by making it sit taller and fill the wheel wells, but want to make sure I have no interference probs. I am currently running 275/60-15's on all 4-corners from the PO. I like the width and how they sit at the edge of the wheel wells, but they're too short for my liking. Should I look at taller 15" tires for my current 8-lug 15" rims or change over to 16" rims? I have searched a lot of postings but don't see where anyone really mentions backspacing on their 16" C20 8-luggers. I also see where some have used H2 wheels, but again not sure of the backspace and rim width. What you guys got?
__________________
~ Dan ![]() My 70 K10 SWB build:http://67-72chevytrucks.com/vboard/s...d.php?t=782232 My 71 SWB build:http://67-72chevytrucks.com/vboard/s...d.php?t=651394 1970 SWB Fleet K10 4X4, 5.3L LM7, 4L60E, Dakota Digital RTX, Vintage Air, Ididit tilt 1971 SWB Fleet C10 - Original SWB Arizona truck, new custom restoration project "Kick out your motor and drive while you're still alive - kick it out!" - Heart 1977 |
![]() |
![]() |
![]() |
#2 |
Special Order
![]() ![]() Join Date: Nov 2004
Location: Mt Airy, MD
Posts: 85,859
|
Re: Another C20 8-lug wheel question.
With keeping 15" wheels I'd go to a 70 series.You want a 31-33" tall tire with 32" being ideal.
__________________
"BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~ |
![]() |
![]() |
![]() |
#3 |
Roto Reuter thats the name...
![]() Join Date: Feb 2010
Location: Darien, NY
Posts: 1,853
|
Re: Another C20 8-lug wheel question.
That's a thought, but I'm wondering what about 16" wheels and tires. Anyone got any ideas?
__________________
~ Dan ![]() My 70 K10 SWB build:http://67-72chevytrucks.com/vboard/s...d.php?t=782232 My 71 SWB build:http://67-72chevytrucks.com/vboard/s...d.php?t=651394 1970 SWB Fleet K10 4X4, 5.3L LM7, 4L60E, Dakota Digital RTX, Vintage Air, Ididit tilt 1971 SWB Fleet C10 - Original SWB Arizona truck, new custom restoration project "Kick out your motor and drive while you're still alive - kick it out!" - Heart 1977 |
![]() |
![]() |
![]() |
#4 |
Registered User
![]() Join Date: Sep 2004
Location: Topeka, Ks
Posts: 604
|
Re: Another C20 8-lug wheel question.
Surprised you have 15" 8 lug wheels. Pretty much everything is 16" or bigger to clear brakes, but older trucks have drums so its not an issue. If you want something tall and narrow, Id would switch to a 16" wheel and run like a 245/75 or even a 235/85. Both are really common sizes.
__________________
Daily-94 K2500 350 5spd extended cab longbox Project Red Velvet-68 C20 396-th400-AC-PS-PB-all original except for the 8 track and the gun rack. Build thread>>>>http://67-72chevytrucks.com/vboard/s...d.php?t=495881 My 01 TA and 88 Formula hide in the garage. :-) |
![]() |
![]() |
![]() |
#5 |
Six in a row makes it go...
![]() Join Date: Mar 2009
Location: Vacationland: Maine
Posts: 1,346
|
Re: Another C20 8-lug wheel question.
Here's what 235/85/16 tires on 16x6 later model steel wheels looks like:
__________________
67 C20 long step resto: http://67-72chevytrucks.com/vboard/s...d.php?t=342086 66 C10 long step build: http://67-72chevytrucks.com/vboard/s...=1#post3814790 CT to Alaska in a 67 C10: http://67-72chevytrucks.com/vboard/s...d.php?t=399224 “The height of sophistication is simplicity." - Clare Boothe Luce |
![]() |
![]() |
![]() |
#6 |
The Niner
![]() Join Date: Nov 2010
Location: Broad Brook, CT
Posts: 2,494
|
Re: Another C20 8-lug wheel question.
__________________
"A good racer is one whose head is in communication with his balls." - Richie Evans 1970 C/20 - 402/TH400/3.54s - 74K miles 2003 GMC Sierra 2500 - Wheatland Yellow Niner Progression Thread: http://67-72chevytrucks.com/vboard/s...d.php?t=697183 Classic Trucks article: https://www.motortrend.com/features/...et-c20-driven/ |
![]() |
![]() |
![]() |
#7 |
Roto Reuter thats the name...
![]() Join Date: Feb 2010
Location: Darien, NY
Posts: 1,853
|
Re: Another C20 8-lug wheel question.
Looking good guys. Keep the pictures along with wheel and tire sizes coming. I'll find something I like. I am thinking of changing to front discs, so it sounds like I'll have to change over to 16" wheels. I want to fill the wheel wells and go with a taller stance.
__________________
~ Dan ![]() My 70 K10 SWB build:http://67-72chevytrucks.com/vboard/s...d.php?t=782232 My 71 SWB build:http://67-72chevytrucks.com/vboard/s...d.php?t=651394 1970 SWB Fleet K10 4X4, 5.3L LM7, 4L60E, Dakota Digital RTX, Vintage Air, Ididit tilt 1971 SWB Fleet C10 - Original SWB Arizona truck, new custom restoration project "Kick out your motor and drive while you're still alive - kick it out!" - Heart 1977 |
![]() |
![]() |
![]() |
#8 |
The Niner
![]() Join Date: Nov 2010
Location: Broad Brook, CT
Posts: 2,494
|
Re: Another C20 8-lug wheel question.
This is what my truck looked like before I put the lifting blocks in the back. I t 235/85/16's on 16 X 6.5 Alcoas.
![]()
__________________
"A good racer is one whose head is in communication with his balls." - Richie Evans 1970 C/20 - 402/TH400/3.54s - 74K miles 2003 GMC Sierra 2500 - Wheatland Yellow Niner Progression Thread: http://67-72chevytrucks.com/vboard/s...d.php?t=697183 Classic Trucks article: https://www.motortrend.com/features/...et-c20-driven/ |
![]() |
![]() |
![]() |
#9 | |
Roto Reuter thats the name...
![]() Join Date: Feb 2010
Location: Darien, NY
Posts: 1,853
|
Re: Another C20 8-lug wheel question.
Quote:
__________________
~ Dan ![]() My 70 K10 SWB build:http://67-72chevytrucks.com/vboard/s...d.php?t=782232 My 71 SWB build:http://67-72chevytrucks.com/vboard/s...d.php?t=651394 1970 SWB Fleet K10 4X4, 5.3L LM7, 4L60E, Dakota Digital RTX, Vintage Air, Ididit tilt 1971 SWB Fleet C10 - Original SWB Arizona truck, new custom restoration project "Kick out your motor and drive while you're still alive - kick it out!" - Heart 1977 |
|
![]() |
![]() |
![]() |
#10 | |
Senior Member
![]() Join Date: Aug 2011
Location: Reno, Nv.
Posts: 1,433
|
Re: Another C20 8-lug wheel question.
Quote:
I have some 16 X 8 with 265/75/16's and stock springs. ![]() ![]() ![]()
__________________
1927 Willy's Knight 24,000 original miles, 1958 Impala 283/Powerglide, 1964 C-30 383/4 speed, 1971 Monte Carlo 350/350, 1972 GMC K2500 350/350, 1976 Chev. K10 350/350, 2006 GMC Sierra 2500HD LBZ Duramax/Allison, 2006 Chev. Silverado K3500 LBZ Duramax/Allison |
|
![]() |
![]() |
![]() |
#11 |
The Niner
![]() Join Date: Nov 2010
Location: Broad Brook, CT
Posts: 2,494
|
Re: Another C20 8-lug wheel question.
^^^Thanks!!! You too! That thing is killer!!!
__________________
"A good racer is one whose head is in communication with his balls." - Richie Evans 1970 C/20 - 402/TH400/3.54s - 74K miles 2003 GMC Sierra 2500 - Wheatland Yellow Niner Progression Thread: http://67-72chevytrucks.com/vboard/s...d.php?t=697183 Classic Trucks article: https://www.motortrend.com/features/...et-c20-driven/ |
![]() |
![]() |
![]() |
#12 |
Special Order
![]() ![]() Join Date: Nov 2004
Location: Mt Airy, MD
Posts: 85,859
|
Re: Another C20 8-lug wheel question.
It sounds like you want wider than what everyone is offering. BTW,15s clear the factory discs with minimal grinding of the caliper along the center casting seam. 15s look no more odd on an 8-lug than on a 6 or 5 lug. But,in 16" tires mounted on an 8" wheel a 285/75 (about 11/32)looks awesome. It will fill out the wheel well in both height and width. A 305/70 (12.50/33) even better. 285/75s will work for same size all four corners. Are you looking for a big/little combo and some rake or all four same size?
The first truck has the 12.50/33s with probably 265/75s on 10s and 8s and the second one is 285/75s on 8s all around:
__________________
"BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~ |
![]() |
![]() |
![]() |
#13 | |
Roto Reuter thats the name...
![]() Join Date: Feb 2010
Location: Darien, NY
Posts: 1,853
|
Re: Another C20 8-lug wheel question.
Quote:
It sounds like I might be able to get away with keeping my 15" rims. I just don't want to have a problem clearing disc calipers when I go with a disc conversion. I will probably look to find some 16" rims somewhere. Do you know what the difference is in putting tires like 265/75-16 on 10's vs 8's? Does it just make it wider looking on the 10's and maybe a bit shorter? Thanks again.
__________________
~ Dan ![]() My 70 K10 SWB build:http://67-72chevytrucks.com/vboard/s...d.php?t=782232 My 71 SWB build:http://67-72chevytrucks.com/vboard/s...d.php?t=651394 1970 SWB Fleet K10 4X4, 5.3L LM7, 4L60E, Dakota Digital RTX, Vintage Air, Ididit tilt 1971 SWB Fleet C10 - Original SWB Arizona truck, new custom restoration project "Kick out your motor and drive while you're still alive - kick it out!" - Heart 1977 |
|
![]() |
![]() |
![]() |
#14 |
Special Order
![]() ![]() Join Date: Nov 2004
Location: Mt Airy, MD
Posts: 85,859
|
Re: Another C20 8-lug wheel question.
I think even 8" rims may be a touch wide for 265/75s.
__________________
"BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~ |
![]() |
![]() |
![]() |
#15 |
Registered User
Join Date: Jul 2007
Location: Toppenish, WA
Posts: 15,503
|
Re: Another C20 8-lug wheel question.
Not one of the show trucks but my daily has 245-75-16 on 16x8 ultra rims. I have no idea of the back spacing though.
![]() It has the stock camper what ever you want to call it suspension on it. GMC with a Chevy nose due to my aunt getting in a fender bender. |
![]() |
![]() |
![]() |
#16 | |
Senior Member
![]() Join Date: Aug 2011
Location: Reno, Nv.
Posts: 1,433
|
Re: Another C20 8-lug wheel question.
Quote:
__________________
1927 Willy's Knight 24,000 original miles, 1958 Impala 283/Powerglide, 1964 C-30 383/4 speed, 1971 Monte Carlo 350/350, 1972 GMC K2500 350/350, 1976 Chev. K10 350/350, 2006 GMC Sierra 2500HD LBZ Duramax/Allison, 2006 Chev. Silverado K3500 LBZ Duramax/Allison |
|
![]() |
![]() |
![]() |
#17 |
Registered User
Join Date: May 2011
Location: Little Falls, NY
Posts: 27
|
Re: Another C20 8-lug wheel question.
![]() 275/55/20 on my longhorn |
![]() |
![]() |
![]() |
#18 |
Registered User
Join Date: Aug 2009
Location: Concord, CA
Posts: 147
|
Re: Another C20 8-lug wheel question.
Thanks for posting the pics of my truck special-K. You are close on the tire size. I have 285 75 R16s on the rear and 245 75 r16s in the front. The pics shown are with front drum brakes. When I switched to discs, the wheels were pushed out about an inch. Here are a couple of pics. The left wheel is mounted on a disc brake and the right wheel is mounted on a drum. This gives a pretty good perspective of how the stance will change when going to discs.
|
![]() |
![]() |
![]() |
#19 | |
Roto Reuter thats the name...
![]() Join Date: Feb 2010
Location: Darien, NY
Posts: 1,853
|
Re: Another C20 8-lug wheel question.
Quote:
I want to make sure the outer edge of the front wheels line up with the rears. I don't want the fronts pushed out wider then the rears. I also wonder about the height of the tires mounted on the rims. A 245/75-16 has a sidewall height of 7.2 inches and a diameter of 30.5 inches. A 285/75-16 has a sidewall height of 8.4 inches and a diameter of 32.8 inches. The 285's are 2.3 inches taller. Does it make a difference having the 285's mounted on 10" rims and the 245's mounted on 8" rims? I kind of want to keep the tires the same height on all 4-corners. Thanks for all the info. Keep those pictures and wheel/tire sizes coming!
__________________
~ Dan ![]() My 70 K10 SWB build:http://67-72chevytrucks.com/vboard/s...d.php?t=782232 My 71 SWB build:http://67-72chevytrucks.com/vboard/s...d.php?t=651394 1970 SWB Fleet K10 4X4, 5.3L LM7, 4L60E, Dakota Digital RTX, Vintage Air, Ididit tilt 1971 SWB Fleet C10 - Original SWB Arizona truck, new custom restoration project "Kick out your motor and drive while you're still alive - kick it out!" - Heart 1977 |
|
![]() |
![]() |
![]() |
#20 |
Registered User
Join Date: Aug 2009
Location: Concord, CA
Posts: 147
|
Re: Another C20 8-lug wheel question.
The front and rear tires line up nicely now. Before discs, I didn't like the look because the front wheels were considerably inside compared to the rears. It looks much better now.
I have a staggered look to my truck, so the front tire diameter is smaller. The second truck that special-K showed with the 285/75s may be the way you want to go. |
![]() |
![]() |
![]() |
#21 |
The Niner
![]() Join Date: Nov 2010
Location: Broad Brook, CT
Posts: 2,494
|
Re: Another C20 8-lug wheel question.
That green and white C/20 looks like the same tires I have, 265's...
I've been wrong before, though.
__________________
"A good racer is one whose head is in communication with his balls." - Richie Evans 1970 C/20 - 402/TH400/3.54s - 74K miles 2003 GMC Sierra 2500 - Wheatland Yellow Niner Progression Thread: http://67-72chevytrucks.com/vboard/s...d.php?t=697183 Classic Trucks article: https://www.motortrend.com/features/...et-c20-driven/ |
![]() |
![]() |
![]() |
#22 |
Roto Reuter thats the name...
![]() Join Date: Feb 2010
Location: Darien, NY
Posts: 1,853
|
Re: Another C20 8-lug wheel question.
It's a nice look with good stance. That's kind of what I'm looking for. All though I must say that rray670's truck looks pretty nice too. The 20's may be a bit to much for me. Anyone see any of these trucks with H2 wheels on them? Pretty sure those are 17". If there are any pictures I'd love to see them and know the tire sizes used.
__________________
~ Dan ![]() My 70 K10 SWB build:http://67-72chevytrucks.com/vboard/s...d.php?t=782232 My 71 SWB build:http://67-72chevytrucks.com/vboard/s...d.php?t=651394 1970 SWB Fleet K10 4X4, 5.3L LM7, 4L60E, Dakota Digital RTX, Vintage Air, Ididit tilt 1971 SWB Fleet C10 - Original SWB Arizona truck, new custom restoration project "Kick out your motor and drive while you're still alive - kick it out!" - Heart 1977 |
![]() |
![]() |
![]() |
#23 | |
Senior Member
![]() Join Date: May 2010
Location: Wisconsin & Arizona
Posts: 4,844
|
Re: Another C20 8-lug wheel question.
Quote:
|
|
![]() |
![]() |
![]() |
#24 | |
Roto Reuter thats the name...
![]() Join Date: Feb 2010
Location: Darien, NY
Posts: 1,853
|
Re: Another C20 8-lug wheel question.
Quote:
__________________
~ Dan ![]() My 70 K10 SWB build:http://67-72chevytrucks.com/vboard/s...d.php?t=782232 My 71 SWB build:http://67-72chevytrucks.com/vboard/s...d.php?t=651394 1970 SWB Fleet K10 4X4, 5.3L LM7, 4L60E, Dakota Digital RTX, Vintage Air, Ididit tilt 1971 SWB Fleet C10 - Original SWB Arizona truck, new custom restoration project "Kick out your motor and drive while you're still alive - kick it out!" - Heart 1977 |
|
![]() |
![]() |
![]() |
#25 | |
Registered User
Join Date: May 2011
Location: Little Falls, NY
Posts: 27
|
Re: Another C20 8-lug wheel question.
Quote:
Thanks I'm not usually a fan of big wheels little tires either, but I picked these up for $100, so put them on one day just to see how they looked. I thought they actually looked good so I left them on. |
|
![]() |
![]() |
![]() |
Bookmarks |
|
|