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03-22-2010, 04:17 AM | #1 |
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Re: Boss 338 Wheels **GROUP BUY**
I'm pretty sure you won't need spacers to run the 20x10's, but I'm sure someone who has them can clarify this.
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03-22-2010, 05:18 AM | #2 |
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Re: Boss 338 Wheels **GROUP BUY**
Look here:
http://67-72chevytrucks.com/vboard/s...352320&page=12 Go down to Benji's post,it doesn't look like he is running a rear spacer on the 20x10's. He may be running a 1/4" spacer like he did on the front but I can't tell for sure by the pics. We will know for sure in a few days.
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03-22-2010, 09:26 AM | #3 | |
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Re: Boss 338 Wheels **GROUP BUY**
Quote:
Below are a couple pics from Benji's post. YMMV.
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03-22-2010, 01:14 PM | #4 | |||
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Re: Boss 338 Wheels **GROUP BUY**
Quote:
Quote:
Quote:
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67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... Cubic inches is like Indiana Jones with a cheap pistol. Last edited by SCOTI; 03-22-2010 at 01:26 PM. |
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03-22-2010, 01:24 PM | #5 |
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Re: Boss 338 Wheels **GROUP BUY**
Just to jump in and hopefully not cause more problems or sound offensive. I think, as it was said, these wheels were designed more for the 88-98 trucks which is why they work well on them as is. Remember, the track width is different for different years of trucks even among the same body styles.
That being said, the key to getting something that works for you is.....MEASURE YOUR TRUCK. No one knows what you have but you.
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03-22-2010, 01:32 PM | #6 |
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Re: Boss 338 Wheels **GROUP BUY**
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03-22-2010, 03:08 PM | #7 |
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Re: Boss 338 Wheels **GROUP BUY**
ah now I see, Ill wait for Leviticus to get his to make my final decision. sorry you answered at the same time I was responding. Ill send you my info through pm.
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03-22-2010, 06:13 AM | #8 |
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Re: Boss 338 Wheels **GROUP BUY**
The 20x8.5's will be fine for the front, if they address the "hub fitment issues".
The rear will need spacers. Everyone is so "blinded" by the cheap price,... that they just forget all the other stuff. Most people running Coys 20x10's have a choice of 5" or 5.5" backspace. These wheels have a 6.225" backspace. Get out your tape measures and check out your trucks for yourself.
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Keith Convert to disc brakes. http://67-72chevytrucks.com/vboard/s...d.php?t=444823 Last edited by lolife99; 03-22-2010 at 06:13 AM. |
03-23-2010, 10:46 AM | #9 | |
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Re: Boss 338 Wheels **GROUP BUY**
Quote:
And this whole time, I thought the b/s offered was custom b/s up to 6.225... I guess they would cost 700+ a rim if that were the case. |
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03-23-2010, 10:55 AM | #10 |
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Re: Boss 338 Wheels **GROUP BUY**
The good news is they're a direct bolt-on for your '00 GMC.
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03-23-2010, 12:27 PM | #11 | |
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Re: Boss 338 Wheels **GROUP BUY**
00 GM's are 6-lug.
Quote:
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67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... Cubic inches is like Indiana Jones with a cheap pistol. |
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03-23-2010, 12:37 PM | #12 |
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Re: Boss 338 Wheels **GROUP BUY**
D'OH! Just snap one off.
Is it '88-98 that were 5-lug?
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03-22-2010, 09:59 AM | #13 |
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Re: Boss 338 Wheels **GROUP BUY**
Here's a quote from Benji:
"here is my 72 bagged, still have to cut out the front fenders and tube out the back to it will go lower" I think he means tub out the back. I just measured up a truck with 20x10's with the narrower 67-70 rearend housing. His backspace numbers were 4.75 inches. These wheels are 6.225" BS. Good Luck guys.
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03-22-2010, 10:26 AM | #14 | |
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Re: Boss 338 Wheels **GROUP BUY**
Quote:
To be clear: There is no substitute for measuring your own setup and determining exactly what you need. I'm curious, Keith ... since you started the original behemoth Boss 338 thread, do you know what the owner of the truck you photographed did with the rear wheels? And you've got these wheels, too, so what have you done about the rear backspacing? Sorry if this is answered elsewhere, but I can't take time at work to read through the 28 pages in that thread plus search through your other posts elsewhere.
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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...) Last edited by brossow; 03-22-2010 at 10:28 AM. |
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03-22-2010, 11:03 AM | #15 | |
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Re: Boss 338 Wheels **GROUP BUY**
Quote:
I haven't mounted my wheels on a truck yet. My 69 is still 6-lug. I plan to run spacers,... I always have. I think without them they will contact the wheel tubs.(especially with the 67-70 rearend). My blazer has the wider 71-72 rearend and I have a 5.5" bs wheel on it,... and it is close on the inside. No room for another .725" of backspace.
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Keith Convert to disc brakes. http://67-72chevytrucks.com/vboard/s...d.php?t=444823 Last edited by lolife99; 03-22-2010 at 11:06 AM. |
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03-22-2010, 11:16 AM | #16 | ||
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Re: Boss 338 Wheels **GROUP BUY**
Quote:
Quote:
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03-22-2010, 12:33 PM | #17 | |
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Re: Boss 338 Wheels **GROUP BUY**
[/I]
Quote:
If people are scared to run spacers,... that's their option. I just don't think people understand or realize what a 6.225" bs means. I just want everyone to know what they are getting. I would never run anything other than 8.5's up front and 10's in the rear with these 338 wheels. I always planned to run spacers on the rear. I also switched to 1" rotors up front because I didn't want to use a spacer up front. (the 5.25" BS on the 8.5's is just barely enough for my liking) My biggest pet peeve with wheels is the wrong backspace. In my opinion,... the wheels have to fit the truck. The offsets have to be different due to the wider track width of the front suspension. (or the rear wheels need to be wider) Again,... this is just my opinion. I'll get out of this thread. I seem to be doing more harm than good. SCOTI posted alot of good info about running the 20x10's with this 6.225" BS,... and no one seemed to be listening. So I chimed in with the spacer comment. SCOTI's quote: My 68 w/the stock 68 12-bolt could use 5-5.50" back-spacing. I installed 5.50"BS wheels that required mini-tubbing the bed floor. Add an additional .725" & it would only be worse. The use of a wider 71-72 rear might work better here but I'm not sure how much clearance would be there..... The 5.50"BS was about the max I could use on my 74 (w/stock 74 12-bolt). Again, any more back-spacing would require mini-tubbing. There might be a slight chance they'd fit but it would be close. The easy solution for everyone running a 15x8 ralley wheel, is to go out and see if you have another 2-3/16" or 2-1/4" of room between the inside edge of the wheel and the wheel tub. If you do fine. They will work. (Just be sure to measure both sides of the truck,... because they are usually different)
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Keith Convert to disc brakes. http://67-72chevytrucks.com/vboard/s...d.php?t=444823 Last edited by lolife99; 03-22-2010 at 12:40 PM. |
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03-22-2010, 10:51 AM | #18 |
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Re: Boss 338 Wheels **GROUP BUY**
I think an 'easy fix' for this backspacing 'issue' would be to just order 20x8.5 all the way around and not have ANY issue with backspacing, at least that's what I plan on doing.
Plus it makes good for rotating tires, functionality and good looks.
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03-22-2010, 10:57 AM | #19 |
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Re: Boss 338 Wheels **GROUP BUY**
Excuse my ignorance...why would someone order different backspacing between the front and back? Can someone give me a quick and simple explanation of what backspacing is? Is it to do with how close the lip of wheel gets to the fender? Would either of these wheels fit with a stock 72 2wd rear end?
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03-22-2010, 02:05 PM | #20 | |
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Re: Boss 338 Wheels **GROUP BUY**
Quote:
People like to go staggered to get the widest possible tire on the back of their RWD car/truck to get increased traction and looks. Here's a simple image that goes over wheel fitment Q: How do I measure backspace? A: The easiest way to measure backspace is to lay the wheel face down onto the ground so the backside of the wheel is facing up. Take a straight edge and lay it diagonally across the inboard flange of the wheel. Take a tape measure and measure the distance from where the straight edge contacts the inboard flange to the hub-mounting pad of the wheel. This measurement is backspace. The following photo shows three wheels with 2", 3", & 4" backspace. and here's a good link with plenty of wheel measurement info http://www.customtacos.com/tech/index.php?article=40 |
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03-22-2010, 11:08 AM | #21 |
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Re: Boss 338 Wheels **GROUP BUY**
So another dumb question. Do the 18 x 8.5 come in 8.5", or 8" width. On the price sheet it says 8.5", but on the spec sheet it says 8"?
I'm a loser. I'm only looking for the 18's not the 20's. Shawn
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03-22-2010, 11:17 AM | #22 |
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Re: Boss 338 Wheels **GROUP BUY**
Should say 8" -- my cut-n-paste error. All fixed now. Thanks for the heads-up!
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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...) Last edited by brossow; 03-22-2010 at 11:37 AM. |
03-22-2010, 12:07 PM | #23 |
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Re: Boss 338 Wheels **GROUP BUY**
Ordered mine, staggered set of 20's - spacers don't scare me.
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03-22-2010, 12:12 PM | #24 |
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Re: Boss 338 Wheels **GROUP BUY**
Its morning now and well Im still tired lol. but I have a clear thought now. how would much would shipping to canada cost? Im really interested, I was just about to buy c5's but these are looking very inviting. Im not scared of the spacer either, lots of people use them lol
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03-22-2010, 02:10 PM | #25 | |
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Re: Boss 338 Wheels **GROUP BUY**
Quote:
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