The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1967 - 1972 Chevrolet & GMC Pickups Message Board

Web 67-72chevytrucks.com


Closed Thread
 
Thread Tools Display Modes
Old 04-02-2013, 08:39 AM   #1301
ksbrktracer
TNT-MOTORSPORTS
 
ksbrktracer's Avatar
 
Join Date: Mar 2008
Location: TULSA OKLAHOMA
Posts: 2,692
Re: Got some new wheels: Boss 338's in 20x10 and 20x8.5

How are the center caps held on ......? O-rings or Plastic clips. Plastc clips are the early wheel and O-ring is the Revised wheel. The part # you listed is a 338 wheel.
ksbrktracer is offline  
Old 04-02-2013, 09:19 AM   #1302
bryan76
Registered User
 
Join Date: Jun 2012
Location: cville ga
Posts: 65
Re: Got some new wheels: Boss 338's in 20x10 and 20x8.5

the cap is o-ring and the 20x8.5 is the correct part number when i get home ill test fit
Posted via Mobile Device
bryan76 is offline  
Old 04-02-2013, 09:27 AM   #1303
ksbrktracer
TNT-MOTORSPORTS
 
ksbrktracer's Avatar
 
Join Date: Mar 2008
Location: TULSA OKLAHOMA
Posts: 2,692
Re: Got some new wheels: Boss 338's in 20x10 and 20x8.5

Sounds like a new wheel in an old part# box
ksbrktracer is offline  
Old 04-02-2013, 11:10 AM   #1304
bryan76
Registered User
 
Join Date: Jun 2012
Location: cville ga
Posts: 65
Re: Got some new wheels: Boss 338's in 20x10 and 20x8.5

this is off the wheel
Posted via Mobile Device
Attached Images
 
bryan76 is offline  
Old 04-02-2013, 11:23 AM   #1305
brossow
Amateur Rust Fighter
 
brossow's Avatar
 
Join Date: Sep 2007
Location: Mankato, MN
Posts: 1,087
Re: Got some new wheels: Boss 338's in 20x10 and 20x8.5

Quote:
Originally Posted by bryan76 View Post
this is off the wheel
Those must be the new revision that just came out -- not even listed on the Boss site yet. Not sure why they've reverted to -1AA for the revision, unless it's because they consider the different offset a new line. That +2mm offset gets them much closer to where they should be, with about 5.6" of backspacing instead of 6.3" on the older versions with a +20mm offset. You still may need to run a 1/4" spacer, but it depends on your individual setup, rear end width, tire choice, etc. Only ways to know are to measure carefully or just bolt it up and see what happens.

For reference, these are my 20x10 specs from back in 2010: http://67-72chevytrucks.com/vboard/s...=1#post3933454
__________________
Brent

'72 Chevy SWB stepside - [ Build Thread ]
'79 ChevMC SWB fleetside - [ Build Thread ]
'64 Chevy SWB fleetside & '66 Chevy SWB stepside (waiting in the wings...)
brossow is offline  
Old 04-02-2013, 11:33 AM   #1306
bryan76
Registered User
 
Join Date: Jun 2012
Location: cville ga
Posts: 65
Re: Got some new wheels: Boss 338's in 20x10 and 20x8.5

its a 4/6 drop maybe alittle more in the rear 82 shortbed factory10 bolt rear planning on a 275-35-20 rear
Posted via Mobile Device
Attached Images
 
bryan76 is offline  
Old 04-02-2013, 11:43 AM   #1307
ksbrktracer
TNT-MOTORSPORTS
 
ksbrktracer's Avatar
 
Join Date: Mar 2008
Location: TULSA OKLAHOMA
Posts: 2,692
Re: Got some new wheels: Boss 338's in 20x10 and 20x8.5

Quote:
Originally Posted by bryan76 View Post
its a 4/6 drop maybe alittle more in the rear 82 shortbed factory10 bolt rear planning on a 275-35-20 rear
Posted via Mobile Device
That might be a little short on the tire for the rear ..... at least for my taste. Only gonna be 27-1/2" tall , those trucks can usually take more tire.

That wheel still has the 82.80mm bore size so you will still have to mod the front rotor more than likely , unless it is a light duty rotor front which it could be on an 82. Then they will just bolt on.
ksbrktracer is offline  
Old 04-02-2013, 11:46 AM   #1308
bryan76
Registered User
 
Join Date: Jun 2012
Location: cville ga
Posts: 65
Re: Got some new wheels: Boss 338's in 20x10 and 20x8.5

it has 1" rotors and i was wanting to stay around 28" tall but this is all new to me but all the info is greatly appreciated thanks
Posted via Mobile Device
bryan76 is offline  
Old 04-02-2013, 12:06 PM   #1309
brossow
Amateur Rust Fighter
 
brossow's Avatar
 
Join Date: Sep 2007
Location: Mankato, MN
Posts: 1,087
Re: Got some new wheels: Boss 338's in 20x10 and 20x8.5

Quote:
Originally Posted by bryan76 View Post
it has 1" rotors and i was wanting to stay around 28" tall but this is all new to me but all the info is greatly appreciated thanks
Posted via Mobile Device
I went with 245/40-20 (27.72" tall) and 295/40-20 (29.29" tall) on my staggered 20s. I would have preferred 295/35 (28.13" tall) on the rear but it wasn't available in the tire I wanted.
__________________
Brent

'72 Chevy SWB stepside - [ Build Thread ]
'79 ChevMC SWB fleetside - [ Build Thread ]
'64 Chevy SWB fleetside & '66 Chevy SWB stepside (waiting in the wings...)
brossow is offline  
Old 04-02-2013, 12:18 PM   #1310
ksbrktracer
TNT-MOTORSPORTS
 
ksbrktracer's Avatar
 
Join Date: Mar 2008
Location: TULSA OKLAHOMA
Posts: 2,692
Re: Got some new wheels: Boss 338's in 20x10 and 20x8.5

Quote:
Originally Posted by brossow View Post
I went with 245/40-20 (27.72" tall) and 295/40-20 (29.29" tall) on my staggered 20s. I would have preferred 295/35 (28.13" tall) on the rear but it wasn't available in the tire I wanted.

This is what I would do also.
If you get on tirerack.com you can compare sizes of tires and wheel widths etc.
ksbrktracer is offline  
Old 04-02-2013, 12:22 PM   #1311
bryan76
Registered User
 
Join Date: Jun 2012
Location: cville ga
Posts: 65
Re: Got some new wheels: Boss 338's in 20x10 and 20x8.5

ok thanks ill look at those size tires
Posted via Mobile Device
bryan76 is offline  
Old 04-02-2013, 09:28 PM   #1312
Marko3002
Registered User
 
Marko3002's Avatar
 
Join Date: Dec 2012
Location: Phoenix
Posts: 38
Re: Got some new wheels: Boss 338's in 20x10 and 20x8.5

Just got a set of the Boss 338's and they bolted on perfectly without any issues!!
Attached Images
 
Marko3002 is offline  
Old 04-02-2013, 09:32 PM   #1313
brossow
Amateur Rust Fighter
 
brossow's Avatar
 
Join Date: Sep 2007
Location: Mankato, MN
Posts: 1,087
Re: Got some new wheels: Boss 338's in 20x10 and 20x8.5

Quote:
Originally Posted by Marko3002 View Post
Just got a set of the Boss 338's and they bolted on perfectly without any issues!!
Must have light-duty (1") or aftermarket rotors up front.
__________________
Brent

'72 Chevy SWB stepside - [ Build Thread ]
'79 ChevMC SWB fleetside - [ Build Thread ]
'64 Chevy SWB fleetside & '66 Chevy SWB stepside (waiting in the wings...)
brossow is offline  
Old 04-02-2013, 10:02 PM   #1314
landsurvey1
Registered User
 
landsurvey1's Avatar
 
Join Date: Jan 2009
Location: Arizona
Posts: 404
Re: Got some new wheels: Boss 338's in 20x10 and 20x8.5

Mine is the same way, no issues at all.
Attached Images
 
__________________
1972 Chevy short bed ZZ4 350/355hp GMPP crate engine.
1972 Cheyenne K-20 454/400hp big block
1988 Jeep Wrangler
2010 Jeep Sport Unlimited
landsurvey1 is offline  
Old 04-02-2013, 10:12 PM   #1315
brossow
Amateur Rust Fighter
 
brossow's Avatar
 
Join Date: Sep 2007
Location: Mankato, MN
Posts: 1,087
Re: Got some new wheels: Boss 338's in 20x10 and 20x8.5

For you guys who are posting that you installed without issues, please be sure to include what rotors you're running up front. For years now we've been battling this false impression that these are bolt-on wheels, which they still are not except in rare circumstances - namely for the relatively few trucks running light-duty or aftermarket rotors. Thanks!
__________________
Brent

'72 Chevy SWB stepside - [ Build Thread ]
'79 ChevMC SWB fleetside - [ Build Thread ]
'64 Chevy SWB fleetside & '66 Chevy SWB stepside (waiting in the wings...)
brossow is offline  
Old 04-02-2013, 10:47 PM   #1316
Marko3002
Registered User
 
Marko3002's Avatar
 
Join Date: Dec 2012
Location: Phoenix
Posts: 38
Re: Got some new wheels: Boss 338's in 20x10 and 20x8.5

Wouldnt know the difference in rotors or what to look for but the rep from Boss told me they had such a demand for this wheel on these older trucks that they re tooled the wheel. He gauranteed me they would fit and didnt ask a thing about the rotors.
Marko3002 is offline  
Old 04-02-2013, 10:49 PM   #1317
bryan76
Registered User
 
Join Date: Jun 2012
Location: cville ga
Posts: 65
Re: Got some new wheels: Boss 338's in 20x10 and 20x8.5

what was the part number on the rear wheels
Posted via Mobile Device
bryan76 is offline  
Old 04-02-2013, 11:14 PM   #1318
brossow
Amateur Rust Fighter
 
brossow's Avatar
 
Join Date: Sep 2007
Location: Mankato, MN
Posts: 1,087
Re: Got some new wheels: Boss 338's in 20x10 and 20x8.5

Quote:
Originally Posted by Marko3002 View Post
Wouldnt know the difference in rotors or what to look for but the rep from Boss told me they had such a demand for this wheel on these older trucks that they re tooled the wheel. He gauranteed me they would fit and didnt ask a thing about the rotors.
Boss/AEWC has been full of crap for years and the reps will tell you whatever they think you want to hear. You can see in a post just a few above yours that the back bore, which is THE source of interference with most front rotors, hasn't changed since the wheels were first introduced. They've claimed repeatedly that they had retooled and fixed the problem, but the numbers don't lie and that bore hasn't changed by so much as a millimeter.
__________________
Brent

'72 Chevy SWB stepside - [ Build Thread ]
'79 ChevMC SWB fleetside - [ Build Thread ]
'64 Chevy SWB fleetside & '66 Chevy SWB stepside (waiting in the wings...)
brossow is offline  
Old 04-02-2013, 11:21 PM   #1319
ksbrktracer
TNT-MOTORSPORTS
 
ksbrktracer's Avatar
 
Join Date: Mar 2008
Location: TULSA OKLAHOMA
Posts: 2,692
Re: Got some new wheels: Boss 338's in 20x10 and 20x8.5

Quote:
Originally Posted by Marko3002 View Post
Wouldnt know the difference in rotors or what to look for but the rep from Boss told me they had such a demand for this wheel on these older trucks that they re tooled the wheel. He gauranteed me they would fit and didnt ask a thing about the rotors.
Quote:
Originally Posted by brossow View Post
For you guys who are posting that you installed without issues, please be sure to include what rotors you're running up front. For years now we've been battling this false impression that these are bolt-on wheels, which they still are not except in rare circumstances - namely for the relatively few trucks running light-duty or aftermarket rotors. Thanks!
Quote:
Originally Posted by landsurvey1 View Post
Mine is the same way, no issues at all.
Quote:
Originally Posted by brossow View Post
Must have light-duty (1") or aftermarket rotors up front.
Quote:
Originally Posted by Marko3002 View Post
Just got a set of the Boss 338's and they bolted on perfectly without any issues!!

Yes they do fit 1" rotors with no mods. But I personally have put the rev.3 wheel ON 2 DIFFERENT TRUCKS NOW WITH 1-1/4 THICK ROTORS. One is a 68 with an 86 suburban crossmember bolted under it. (My own personal truck with what appear to be original GM Rotors) and the other is my cousins 72 swb truck.( It does have NAPA Brand relacement rotors on it.) Now I can say they will not fit my 78 2wd Blazer with 1-1/4 rotors though.
ksbrktracer is offline  
Old 04-02-2013, 11:26 PM   #1320
brossow
Amateur Rust Fighter
 
brossow's Avatar
 
Join Date: Sep 2007
Location: Mankato, MN
Posts: 1,087
Re: Got some new wheels: Boss 338's in 20x10 and 20x8.5

Quote:
Originally Posted by ksbrktracer View Post
Yes they do fit 1" rotors with no mods. But I personally have put the rev.3 wheel ON 2 DIFFERENT TRUCKS NOW WITH 1-1/4 THICK ROTORS. One is a 68 with an 86 suburban crossmember bolted under it. (My own personal truck with what appear to be original GM Rotors) and the other is my cousins 72 swb truck.( It does have NAPA Brand relacement rotors on it.) Now I can say they will not fit my 78 2wd Blazer with 1-1/4 rotors though.
Get out your caliper and measure the diameter of the hubs on those two trucks with 1.25" rotors. Bet it's not the same as stock HD rotors. You yourself proved they haven't fixed the issue because they won't bolt on to your Blazer. Can't believe that 1300+ posts later in this thread there are still people who think the problem is solved just because they (a) got lucky with replacement/aftermarket rotors or (b) don't realize they have light-duty rotors.
__________________
Brent

'72 Chevy SWB stepside - [ Build Thread ]
'79 ChevMC SWB fleetside - [ Build Thread ]
'64 Chevy SWB fleetside & '66 Chevy SWB stepside (waiting in the wings...)
brossow is offline  
Old 04-02-2013, 11:38 PM   #1321
ksbrktracer
TNT-MOTORSPORTS
 
ksbrktracer's Avatar
 
Join Date: Mar 2008
Location: TULSA OKLAHOMA
Posts: 2,692
Re: Got some new wheels: Boss 338's in 20x10 and 20x8.5

Never said I thought the problem was solved....... Not trying to argue about it either . Just saying there is light at the end of the tunnel. They are getting closer to making a wheel that will bolt onto these trucks.




I personally have measured the snouts on some of the rotors and there are some variations in them. If the rotor snout measures 2-1/2" accross the wheel will fit , If it is much larger than that they will not.
Again I am not trying to argue .....Just saying don't give up on them yet , they are getting closer.

My rotors on my 68 truck absolutely look 100% original GM. and the wheels fit snugly, but are not forced or tightened down to seat them, THEY FIT LIKE THEY SHOULD. THEY HAVE BEEN MEASURED .....THEY ARE 1-1/4 rotors from an 86 suburban
ksbrktracer is offline  
Old 04-03-2013, 06:45 AM   #1322
lolife99
67-72 parts collector,…
 
lolife99's Avatar
 
Join Date: Nov 2002
Location: Mid-MO
Posts: 22,700
Re: Got some new wheels: Boss 338's in 20x10 and 20x8.5

I think what brossow is trying to say,... is that Boss/AE wheels hasn't addressed the problem since the "3AA" wheel revision that didn't even come close to addressing the problem.

brossow and I have been talking about these wheels since I started this thread in 2009.

The truth is,... the variation in 1-1/4" rotor hub dimensions, (be it aftermarket or oem),... is the only way these wheels are a true "bolt-on" with the HD rotors.

No way is Boss continuing to make improvements to the hub design issues of these wheels.
The only improvement is a 20x10 wheel with a 5.5" BS.
__________________
Keith

Convert to disc brakes.
http://67-72chevytrucks.com/vboard/s...d.php?t=444823
lolife99 is offline  
Old 04-03-2013, 08:16 AM   #1323
brossow
Amateur Rust Fighter
 
brossow's Avatar
 
Join Date: Sep 2007
Location: Mankato, MN
Posts: 1,087
Re: Got some new wheels: Boss 338's in 20x10 and 20x8.5

Quote:
Originally Posted by lolife99 View Post
No way is Boss continuing to make improvements to the hub design issues of these wheels.
The only improvement is a 20x10 wheel with a 5.5" BS.
And even then, all they did was add more meat to the back side mounting surface; they didn't even do it the right way by leaving the center section alone and just moving it an inch more inboard. Effectively they just added a permanent spacer to their own wheel. I love the look of the wheel, and I love that it's made in USA, but AEWC/Boss is incompetent when it comes to making meaningful, appropriate changes to their own designs and offerings.
__________________
Brent

'72 Chevy SWB stepside - [ Build Thread ]
'79 ChevMC SWB fleetside - [ Build Thread ]
'64 Chevy SWB fleetside & '66 Chevy SWB stepside (waiting in the wings...)
brossow is offline  
Old 04-03-2013, 07:52 PM   #1324
bryan76
Registered User
 
Join Date: Jun 2012
Location: cville ga
Posts: 65
Re: Got some new wheels: Boss 338's in 20x10 and 20x8.5

just test fit the new 3387-2085-1AA different offset/backspacing and it fits great that is 20x10 rear and 20x8.5 front i have 1" rotors so they worked
Posted via Mobile Device
bryan76 is offline  
Old 04-04-2013, 11:50 PM   #1325
ksbrktracer
TNT-MOTORSPORTS
 
ksbrktracer's Avatar
 
Join Date: Mar 2008
Location: TULSA OKLAHOMA
Posts: 2,692
Re: Got some new wheels: Boss 338's in 20x10 and 20x8.5

Quote:
Originally Posted by bryan76 View Post
just test fit the new 3387-2085-1AA different offset/backspacing and it fits great that is 20x10 rear and 20x8.5 front i have 1" rotors so they worked
Posted via Mobile Device
Good Deal ..... Post some pics.
ksbrktracer is offline  
Closed Thread

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 06:02 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com