Got some new wheels: Boss 338's in 20x10 and 20x8.5

[bryan76]

this is off the wheel
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[brossow]

Originally Posted by bryan76

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

[bryan76]

its a 4/6 drop maybe alittle more in the rear 82 shortbed factory10 bolt rear planning on a 275-35-20 rear
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[ksbrktracer]

Originally Posted by bryan76

its a 4/6 drop maybe alittle more in the rear 82 shortbed factory10 bolt rear planning on a 275-35-20 rear
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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.

[bryan76]

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
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[brossow]

Originally Posted by bryan76

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
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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.

[ksbrktracer]

Originally Posted by brossow

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.