20" BOSS 338 backspacing??
 

What is the proper backspacing used for mounting 20" BOSS 338s on an 81 C-10 pickup?

Fronts - 20 x 8.5 and rears 20 x 10

Thanks,

RIZ :metal:

Re: 20" BOSS 338 backspacing??
 

bump...

I'd like to know the same thing but with a 4.5/6 drop

Kris

Re: 20" BOSS 338 backspacing??
 

Mine will also have the 4.5/6 drop.

RIZ

Re: 20" BOSS 338 backspacing??
 

Here's my wheel tire specs with roughly 6/8 drop...

Boss 338's - 20x8.5 with 255/35/20 & 5.25 backspacing up front
20x10 with 275/35/20 & 5.5 backspacing in the back

Attachment 1125187

Attachment 1125188

Re: 20" BOSS 338 backspacing??
 

I didn't know Boss gives you different backspacing options for the 338s

Re: 20" BOSS 338 backspacing??
 

5.25 on a 8.5" wheel up front, and a 5.5" on a 10" wheel in the back is ideal in my opinion.... for a static dropped truck.

Very nice looking truck Jwall!!! I really like it.

Re: 20" BOSS 338 backspacing??
 

Awesome! Thank you JWall! Very sharp lookin' pick-up you have there!

Now it's time for me to start looking for tire choices.... Ha!
Posted via Mobile Device

Re: 20" BOSS 338 backspacing??
 

Thanks guys!

I am pleased with the wheels for a budget option... just a little grinding on the rotors & they worked out great. Backspacing is right on.

Although, I plan to upgrade them in the near future.

Re: 20" BOSS 338 backspacing??
 

Grinding on the rotors? Did you buy older versions of the rims before they corrected them or are you running the thicker rotors?

RIZ

Re: 20" BOSS 338 backspacing??
 

Boss never corrected anything.
They added a deeper center cap so your dust cap would work.
That's it.

Grind the nose of the rotor.
Done.
5 minutes per side,... max.

Re: 20" BOSS 338 backspacing??
 

Newest version out with standard rotors.... they still require minimal grinding.


Yip. That's all it takes.

Re: 20" BOSS 338 backspacing??
 

They offer different backspacing, getting them is another story.

Re: 20" BOSS 338 backspacing??
 

i have a static 5/6 drop on mine, whats the opinion of running 22's with backspacing of 5.75. would this work?

Re: 20" BOSS 338 backspacing??
 

Here's my wheel tire specs with roughly 6/8 drop...

Boss 338's - 20x8.5 with 255/35/20 & 5.25 backspacing up front
20x10 with 275/35/20 & 5.5 backspacing in the back

I agree with sizes as well

they offer different backspacing, getting them is another story.


I HAVE THESE EXACT SIZES AND BACKSPACING IN STOCK IN THE GRAY FINISH.
AND CAN GET BLACK ,I JUST GOT 2 BLACK 8.5'S IN FOR A CUSTOMER AND THE 20x10'S ARE ON THE WAY

http://www.67-72chevytrucks.com/vboa...=567778&page=3

Re: 20" BOSS 338 backspacing??
 

Jwall, I was going to PM you but thoughts other could benefit from this information.

Could you take some more close up pics of the wheels you have on there.

I am thinking about these for my 71 and super excited that they finally changed out the backspacing on these to get a little more lip on them while keeping the wide rim/tire setup.

Thank You

Re: 20" BOSS 338 backspacing??
 

I have already taken them off the 76...

but here are a few more pics...

Attachment 1309711

Attachment 1309712

Attachment 1309713


They are now on my 98...

Attachment 1309714

Attachment 1309715

Re: 20" BOSS 338 backspacing??
 

JWALL,

They look killer on those trucks. I could be biased though because I just recently sold my Victory Red 91' and picked up a red 71' haha. We have similar taste. I never got into the 73-87 but I am learning to appreciate the body style more now.

Thanks for the pictures! Some close ups on the 98 would be good too. Honestly, I want to see the lip on those wheels.

Thank You

Ulysses

Re: 20" BOSS 338 backspacing??
 

Thanks!

I like them better on my 98 than I did on the 76 although the fitment on the 76 was great just didn't like the style. I am a billet wheel guy!

I can get some pics of the wheels in the next night or 2.

Re: 20" BOSS 338 backspacing??
 

I could be biased because I just love the wheels. I sold the truck and after much research I find it hard to buy another wheel other than these same ones. However I like the deeper dish with the 18s that I had. The other option would be raceline with 12s in back but thats like 7-8 hundred a wheel and the like for the back tires. These wheels are such a cheap option and tires are available too.

Thank You

Ulysses

Re: 20" BOSS 338 backspacing??
 

I have the 20X10's 5.50 BS in stock and have a pair or 20X8.5 5.25 BS that will be in ... in a day or two. If you like a little more tire you could do 255/40/20's and 285/40/20's or even 295/40/20's ..... Gets a little more sidewall and a little better ride because of it.

Re: 20" BOSS 338 backspacing??
 

Took these with my phone last night...

Front...

Attachment 1309990

Rear...

Attachment 1309989