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#1 |
Registered User
![]() Join Date: Jan 2011
Location: Chattanooga TN
Posts: 6,208
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Boss 338 / Coys C5 wheel question
This may have been posted / answered before but I am curious before I make my wheel selection.
My truck is a 69, but it has had the 73-87 front swap. I have heard people mention the Coys and Boss wheels do not fit the 67-72 trucks exactly right (the center bore problem) Would I have the same problem running 73-87 front end? Do you know if the Eagle 225 has the same problem? Also, what's a good backspacing to run on the front? My truck will have about 4.5" drop, (2.5" spindle, one turn cut out of the coils .. PO cut them)running 20x8 or maybe 20x8.5 if I can get away with it. What are you guys running on the front? 5.5" bs? 5" ? what works best? Tire size? Pics? Thanks.
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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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#2 |
Laid Back
![]() Join Date: Apr 2010
Location: mcloud ok
Posts: 2,658
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Re: Boss 338 / Coys C5 wheel question
on the front of my truck im running 20x8 coys with a 5.25 back space and on if they will fit it just depends on if you have light duty or heavy duty rotors most light duty rotors you will have no problem with but you can run a spacer behind the cap
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72 chevy swb Direct dealers for.. Vintage Air, Porterbuilt, Billet Specialties,Budnik wheels ,eddie motorsports, raceline wheels, intro wheels, Dakota Digital, precision, unisteer, Trimparts, and many many more... Laid Back Recreations.. Full restoration shop and full paint and body.. Kyle http://67-72chevytrucks.com/vboard/s...d.php?t=574629 |
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#3 |
Laid Back
![]() Join Date: Apr 2010
Location: mcloud ok
Posts: 2,658
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Re: Boss 338 / Coys C5 wheel question
also the front of my truck is lowered 5.5 with no rubbing problems at all
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72 chevy swb Direct dealers for.. Vintage Air, Porterbuilt, Billet Specialties,Budnik wheels ,eddie motorsports, raceline wheels, intro wheels, Dakota Digital, precision, unisteer, Trimparts, and many many more... Laid Back Recreations.. Full restoration shop and full paint and body.. Kyle http://67-72chevytrucks.com/vboard/s...d.php?t=574629 |
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#4 |
Registered User
![]() Join Date: Mar 2011
Location: memphis tn
Posts: 53
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Re: Boss 338 / Coys C5 wheel question
im all over this thread ! in one month im ordering the c-5 wheels and im intrested to know what others have experienced with them . im so hard up for pics of yalls coys wheels id almost pay to see them !
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#5 |
Master Procrastinator
Join Date: Sep 2009
Location: Grande Prairie AB Canada
Posts: 1,128
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Re: Boss 338 / Coys C5 wheel question
running 20x8.5 338's, cheap wheels to buy and the machining on the rotors cost me $40, pretty minor and could have been ground at home with a common grinder and patience, lots of pics in my build thread probably the last page or 2 just got the front rolling but here are 3 to give you the idea, this was not all machined to fit just to match the factory taper on the rotor, all you need is the top 1/4inch or so needs to be ground for them to fit. The general consensus is the coys are far better quality but the customer service is awful, to me you get what you pay for, my 338's look really good but the caps don't fit too easy I wrecked 2 being rammy, I'm cheap so the 338 was my only option. Truck is just a chassis but I'm running 2.5 western drop spindles and 3 in cpp drop springs out front 7 in drop rear and plan on a 2.5in spacer out back
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#6 |
Registered User
![]() Join Date: Jun 2011
Location: San Diego, Ca.
Posts: 95
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Re: Boss 338 / Coys C5 wheel question
I'm running 338's. 20 x 8.5 fronts, and 20 x 10 rears. They fit fine.
Boss fixed the clearance problem. I just put these on this last weekend. No clearance issues at all and they look awsome!!! |
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#7 | |
Registered User
Join Date: Aug 2010
Location: Lexington NE
Posts: 122
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Re: Boss 338 / Coys C5 wheel question
Quote:
Ok did I miss something? Are these wheels a direct bolt on now? Posted via Mobile Device |
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#8 | |
67-72 parts collector,…
![]() Join Date: Nov 2002
Location: Mid-MO
Posts: 22,699
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Re: Boss 338 / Coys C5 wheel question
Quote:
The 67-87 trucks still require grinding on the Hd 1-1/4" rotors. The 1" LD rotors have always been a bolt on.
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Keith Convert to disc brakes. http://67-72chevytrucks.com/vboard/s...d.php?t=444823 |
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#9 | |
Old member
Join Date: Jan 2002
Location: Liberty, & Garden City S.C. , U.S.
Posts: 19,936
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![]() Quote:
![]() Guys we are basically putting custome wheels on thee trucks so a little grinding isn't such a big deal. The bolt pattern is a direct bolt on. I had the minor problem of rubbing on the rear before using the 3/8 shim but it's my fault for picking the tire I did. It's not the wheels fault. ![]() ![]() ![]()
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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 ![]() 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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#10 |
Registered User
Join Date: Jun 2011
Location: GA
Posts: 281
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Re: Boss 338 / Coys C5 wheel question
what backspacing/offset are your Boss wheels Manxxman??
BTW, nice ride! Is it bagged? or just one hell of a static drop? |
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#11 | |
Registered User
![]() Join Date: Jun 2011
Location: San Diego, Ca.
Posts: 95
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Re: Boss 338 / Coys C5 wheel question
Quote:
Boss only offers 1 backspace for the 8.5 wide rims. I beleive it's 5.75" and the 10's have a 6.25 i think. Yes it's bagged, but it is going lower by the time i am done with it. Thanks for the nice comments. |
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#12 |
Laid Back
![]() Join Date: Apr 2010
Location: mcloud ok
Posts: 2,658
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Re: Boss 338 / Coys C5 wheel question
heres my coys the truck is 5.5 front 8 back front wheels are 5.25 bs and the rears are 5 bs the look and work great i thought the customer service was great ordered the wheels on a monday had them by thursday even know im not keeping these wheels on this truck i would highly suggest them to anyone
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72 chevy swb Direct dealers for.. Vintage Air, Porterbuilt, Billet Specialties,Budnik wheels ,eddie motorsports, raceline wheels, intro wheels, Dakota Digital, precision, unisteer, Trimparts, and many many more... Laid Back Recreations.. Full restoration shop and full paint and body.. Kyle http://67-72chevytrucks.com/vboard/s...d.php?t=574629 |
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#13 | |
Registered User
![]() Join Date: Dec 2006
Location: Toms River, NJ
Posts: 5,518
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Re: Boss 338 / Coys C5 wheel question
Quote:
Posted via Mobile Device
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Keith 66 Suburban Burb Build Thread: http://67-72chevytrucks.com/vboard/s...d.php?t=751361 IG: bennett68c10 |
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#14 |
Senior Member
![]() Join Date: Jan 2002
Location: PORT NECHES, TEXAS / USA
Posts: 1,666
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Re: Boss 338 / Coys C5 wheel question
Hey screaminchevy
On the black chevy with coys. What size tires are you running and is it the stock 71-72 rearend??? Thanks
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55 Chevy original swb (big back window) 61 Chevy bubble top (427-5 speed) 67 Chevy stepside (Krusty) 68 Chevy swb fleet (Lola) 68 Chevy swb fleet 71 Chevy swb fleet ( future PB project) 97 crew cab power stroke 07 SS Trail blazer |
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#15 | |
Registered User
Join Date: Apr 2010
Location: Rowlett, TX
Posts: 325
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Re: Boss 338 / Coys C5 wheel question
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#16 |
Registered User
Join Date: Jun 2008
Location: South Florida
Posts: 11,375
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Re: Boss 338 / Coys C5 wheel question
255.50.18 up front and 295.45.20 in the rear...
zero issues with my coys and I also bought the wheel aluminum spacers for the front after I had already grind the hubs just to be safe..
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Get your facts first, and then you can distort them as much as you please!!!!!. Sylvester's build thread >>>http://67-72chevytrucks.com/vboard/s...ht=big+rebuild |
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#17 | |
Registered User
Join Date: Aug 2015
Location: tupelo ms
Posts: 1
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#18 |
Registered User
Join Date: Jan 2014
Location: Houston,TX
Posts: 258
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Re: Boss 338 / Coys C5 wheel question
Andy4639
Was wondering if you could tell me what bs do you have on your rear wheels (20x10) they have 2 different bs now so I'm trying to figure out what to go with? It looks like your rears stick in more than the front & as it is I have the narrow 69 differential whill you have the wider 70 1/2-72. I'm tubbed so I'm not worried about the fitment part of the bs I'm just trying to get the wheel track as close as I can. My truck is a 69 fleetside with a disc/drum 4/7 drop Thank you |
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#19 |
Laid Back
![]() Join Date: Apr 2010
Location: mcloud ok
Posts: 2,658
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Re: Boss 338 / Coys C5 wheel question
The only thing that I don't like about the boss wheels is the offsets the front stick out more than the rears and the back sits way to far in without running a spacer
Posted via Mobile Device
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72 chevy swb Direct dealers for.. Vintage Air, Porterbuilt, Billet Specialties,Budnik wheels ,eddie motorsports, raceline wheels, intro wheels, Dakota Digital, precision, unisteer, Trimparts, and many many more... Laid Back Recreations.. Full restoration shop and full paint and body.. Kyle http://67-72chevytrucks.com/vboard/s...d.php?t=574629 |
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#20 |
Registered User
Join Date: Sep 2007
Location: vancouver,wa.
Posts: 282
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Re: Boss 338 / Coys C5 wheel question
my blazer is running 20x8 and 20x10 c5's.tires are 235-35 and 275-35...bolt right on and have no clearance issues
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#21 | |
Laid Back
![]() Join Date: Apr 2010
Location: mcloud ok
Posts: 2,658
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Re: Boss 338 / Coys C5 wheel question
Quote:
Posted via Mobile Device
__________________
72 chevy swb Direct dealers for.. Vintage Air, Porterbuilt, Billet Specialties,Budnik wheels ,eddie motorsports, raceline wheels, intro wheels, Dakota Digital, precision, unisteer, Trimparts, and many many more... Laid Back Recreations.. Full restoration shop and full paint and body.. Kyle http://67-72chevytrucks.com/vboard/s...d.php?t=574629 |
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#22 |
motor exploder
Join Date: Mar 2009
Location: Pittsburgh, PA
Posts: 2,346
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Re: Boss 338 / Coys C5 wheel question
Looks awesome - love the stance and color!
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Adam 1969 Chevy CST/10 stepside, DART Big M/TREMEC Magnum Extreme/3.73's w/Detroit Truetrac 1965 Chevy Bel Air Wagon (daily driver), 327/TH350,10 bolt w/3.08's 1961 Chevy Bel Air Sport Coupe, ZZ454/M21/9" rear w/3.50's & Detroit Truetrac 2005 GMC 1500 ccsb 2wd, 6.0L/4L65e/3.73 G80 2006 GMC 2500HD ccsb 4x4, DMax LBZ/Allison 6spd/4.56's w/Detroit TrueTrac ![]() ![]() Use the SEARCH function on this forum - it is your friend!! |
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#23 |
Senior Member
![]() Join Date: Jan 2002
Location: PORT NECHES, TEXAS / USA
Posts: 1,666
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Re: Boss 338 / Coys C5 wheel question
Here is my 72 truck sold a while back with 20x8.5s and 20x10s. 255-45s and 275-45s. About a 4/6 drop. 2.5 spindles with one coil cut. and 5 rear coils and 1-1.5 blocks??? Front tires were to tall, rubbed on dips in road etc.
Boss wheels are worth the time since they are cheap. I want coys still. I didnt like the rear boss wheels because there wasnt much of lip due to the 6.25 B/S. I had a 1 inch adapter to make it work. Less than a 100.00 bucks. EZ adapters. I think?? I had less than $1400.00 in everything. Worked for me because i was selling truck. But i am going to order Coys this week, unless i cant afford my first choice. I also want a 295-40-20s. Hope they fit with no mods to bed. It seems to work for some people.
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55 Chevy original swb (big back window) 61 Chevy bubble top (427-5 speed) 67 Chevy stepside (Krusty) 68 Chevy swb fleet (Lola) 68 Chevy swb fleet 71 Chevy swb fleet ( future PB project) 97 crew cab power stroke 07 SS Trail blazer Last edited by STP67-72; 07-14-2011 at 09:36 PM. Reason: error |
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#24 |
Man of Mini-Talents
Join Date: Sep 2009
Location: Oklahoma City, OK
Posts: 4,295
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Re: Boss 338 / Coys C5 wheel question
These are Coys C-5's 18X8 with 4 bs 255/45-18, 18X9 with 5.5bs 295/45-18
The truck is dropped 3.5/5. The second pic shows the spacer. You can buy them from a forum member (pm me - he's not a board vendor) mde of aluminum, or Coys will send you some plastic ones.
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Steve Project - Ruth 66 Skylark Project - Lola 60 Biscayne Project - Iron Ox 54 GMC 100 Project - Darth 69 Camaro |
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#25 |
Senior Member
![]() Join Date: Jan 2002
Location: PORT NECHES, TEXAS / USA
Posts: 1,666
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Re: Boss 338 / Coys C5 wheel question
Anybody else running 295-20s.
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55 Chevy original swb (big back window) 61 Chevy bubble top (427-5 speed) 67 Chevy stepside (Krusty) 68 Chevy swb fleet (Lola) 68 Chevy swb fleet 71 Chevy swb fleet ( future PB project) 97 crew cab power stroke 07 SS Trail blazer |
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