Boss 338 Wheels **GROUP BUY**

[Sublvr72]

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.

[Leviticus]

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.

[brossow]

Originally Posted by Leviticus

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.

Here's a direct link to Benji's post, which shows the 20x10s on the rear of his '72 without any apparent spacers: http://67-72chevytrucks.com/vboard/s...&postcount=299

Below are a couple pics from Benji's post. YMMV.

[SCOTI]

Originally Posted by brossow

Here's a direct link to Benji's post, which shows the 20x10s on the rear of his '72 without any apparent spacers....

Keep in mind, that truck is a 72 which has the wider (by approx .750 each side) rear 12-bolt. That would explain why they fit w/o spacers/adapters vs. the shorter housing from a 6x-70.

Originally Posted by Wildstreak

I know what bs is need 5-5.5 but would the larger backspace give it a larger lip? just curious

Opposite.... more back spacing within the same width of a wheel means less 'lip' on the outside. Less BS = more lip.

Originally Posted by 72mistressc10

So in other words this is the reason why one "shouldn't", in your opinion, run 20x8.5 all the way around, unless the individual is planning on running a spacer in the rear, correct?
20x10 will fit in the rear for my truck, I was just thinking of the rotating purposes for the 20x8.5 all the way around, but if it won't look right, then I would rather go with staggered.

I like staggered sizing front to rear. I've never owned a vehicle w/the same width F/R thus have never rotated tires. If you don't mind the same size 8.5" front & rear, they should work w/o spacers. The 20x10's appear to work for the rear of 71-72's w/o issue looking @ the pic of Benji's truck (nice truck @ that).

[k5hart]

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.

[brossow]

Originally Posted by k5hart

No one knows what you have but you.

And sometimes not even that.

[Wildstreak]

Originally Posted by SCOTI

Opposite.... more back spacing within the same width of a wheel means less 'lip' on the outside. Less BS = more lip.

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.

[lolife99]

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.

[70k52wd]

Originally Posted by lolife99

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.

I was wondering how long it would take for rear b/s questions to come up.

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.

[brossow]

Originally Posted by 70k52wd

I was wondering how long it would take for rear b/s questions to come up.

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.

The good news is they're a direct bolt-on for your '00 GMC.

[SCOTI]

Originally Posted by brossow

The good news is they're a direct bolt-on for your '00 GMC.

00 GM's are 6-lug.

Measure your truck and compare it with the offset of these wheels. Pre-'70 will almost certainly require a spacer. '71-87 rear ends are 3/4" wider on each side (1.5" total) and may not need a spacer, or may only require a thin one rather than the full adapter-style spacer. Only you can determine for sure if you'll need a spacer.

Everyone needs to be clear: the wheels were retooled for a hub fitment issue, not a backspacing problem. If the backspacing was wrong for your application before, it'll be wrong for your application now. Some people used spacers in the past as a workaround for the fitment issue with the front hub, not because it was needed for backspacing.

I can't run more than 5.50"BS on my 74. Anything more & it will rub the inner wheel tub/mounting hardware.

[brossow]

Originally Posted by SCOTI

00 GM's are 6-lug.

D'OH! Just snap one off.

Is it '88-98 that were 5-lug?

[lolife99]

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.

[brossow]

Originally Posted by lolife99

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.

My impression is that in order to drop it lower he needed more height in the tubs, not width. In another post, he said, "i still need to cut the front fenders and modify my bed to go lower when i slam the bags," which is pretty much the case with everyone wanting to "lay frame" or whatever the young whippersnappers call it, at least as I understand it. If width was an issue, I don't think it would sit as low as it does in the pics. I am not saying that people won't need spacers, and I'm not arguing in any way -- just trying to accurately report what others are experiencing.

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.

[lolife99]

Originally Posted by brossow

My impression is that in order to drop it lower he needed more height in the tubs, not width. In another post, he said, "i still need to cut the front fenders and modify my bed to go lower when i slam the bags," which is pretty much the case with everyone wanting to "lay frame" or whatever the young whippersnappers call it, at least as I understand it. If width was an issue, I don't think it would sit as low as it does in the pics. I am not saying that people won't need spacers, and I'm not arguing in any way -- just trying to accurately report what others are experiencing.

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.

The truck I photographed had 20x8.5's on all four corners. He had a spacer on the back.
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.

[brossow]

Originally Posted by lolife99

The truck I photographed had 20x8.5's on all four corners. He had a spacer on the back.

Ah. I was confused because you said this: "Anyway,... they are 20x10 (6.250" bs) and 20x8.5 (5.250" bs) with the ever popular 5x5 bolt pattern." I thought you were referring to the truck shown, not the rims you ordered. Guess I could have seen that had it occurred to me to look at the width of the chrome lip.

Originally Posted by lolife99

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.

Okay, so obviously it can be done with spacers, which will cost people about $60. Maybe I'm just misinterpreting what you've written, but you've really seemed to be badmouthing the 20x10 option when a cheap solution is not only possible but is in fact what you intend to use. Yes, it's obviously something people should consider when looking at these rims, but I think you've managed to scare away several people over what amounts to a minor issue that's easily resolved. (No offense; that's just how it comes across.)

[lolife99]

[/I]

Originally Posted by brossow

Ah. I was confused because you said this: "Anyway,... they are 20x10 (6.250" bs) and 20x8.5 (5.250" bs) with the ever popular 5x5 bolt pattern." I thought you were referring to the truck shown, not the rims you ordered. Guess I could have seen that had it occurred to me to look at the width of the chrome lip.




Okay, so obviously it can be done with spacers, which will cost people about $60. Maybe I'm just misinterpreting what you've written, but you've really seemed to be badmouthing the 20x10 option when a cheap solution is not only possible but is in fact what you intend to use. Yes, it's obviously something people should consider when looking at these rims, but I think you've managed to scare away several people over what amounts to a minor issue that's easily resolved. (No offense; that's just how it comes across.)

No offense taken.
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)

[72mistressc10]

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.

[72gmcshorty]

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?

[Sublvr72]

Originally Posted by 72gmcshorty

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?

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

[jorgensensc]

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

[brossow]

Originally Posted by jorgensensc

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

Should say 8" -- my cut-n-paste error. All fixed now. Thanks for the heads-up!

[Boyd]

Ordered mine, staggered set of 20's - spacers don't scare me.

[Wildstreak]

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

[Sublvr72]

Originally Posted by Wildstreak

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

no idea on postage to Canada, but if you are interested in a set I can find out for you. Just need your Province, city, and postal code