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Old 11-23-2018, 03:05 PM   #1
caseyjones
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Explorer rear and wheel backspace question

Question for the crew since I can't get to my truck and I need to order some parts. On my 55.1, I am using the Explorer disc brake rear end and I have 16x8 wheels with 4.75" backspace. If I'm doing my math and my research right, a 1" spacer or adapter will put the wheels right where they need to be. Can anyone confirm? Thanks in advance.
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Old 11-23-2018, 04:10 PM   #2
jweb
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Re: Explorer rear and wheel backspace question

It would really be best to measure. Your tire size could be different than someone else's.
I have an explorer axle, 20x8.5" wheels and use 1" adapters. It leaves a 1/2" of clearance on either side of the tire.

I would also highly recommend using hub centric adapters. You can get them custom made to fit the axle and the bore of your wheels.
https://www.uswheeladapters.com/
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Old 11-23-2018, 09:07 PM   #3
caseyjones
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Quote:
Originally Posted by jweb View Post
It would really be best to measure. Your tire size could be different than someone else's.
I have an explorer axle, 20x8.5" wheels and use 1" adapters. It leaves a 1/2" of clearance on either side of the tire.

I would also highly recommend using hub centric adapters. You can get them custom made to fit the axle and the bore of your wheels.
https://www.uswheeladapters.com/
What is the backspace on your wheels?
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Old 11-23-2018, 09:28 PM   #4
jweb
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Re: Explorer rear and wheel backspace question

Quote:
Originally Posted by caseyjones View Post
What is the backspace on your wheels?
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I'm not 100% sure, I bought them over 10 years ago. I think they're 4.75"
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Old 11-24-2018, 09:32 AM   #5
65blackfleetside
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Re: Explorer rear and wheel backspace question

I am not sure what my back spacing is I bought my set of boss rims used but they are 18" in front and 20"s in rear backs look to be at least 8" wide. I am running an S10 frame and 97 Explorer 8.8 Rear with disks + explorer emergency brake etc. Fit like a glove. No spacers needed. Unless your backspacing is custom- You should be fine.(I did have to run billet aluminum spacers up front)
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Old 11-24-2018, 10:01 AM   #6
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Re: Explorer rear and wheel backspace question

Sorry that was 8 chapters ago on my build- I did actuall have a rear tire rub problem with the 8.8. As a result I installed mini tubs. Purchased smallest Northern tool $40 trailer fender. rip in half with cut off wheel. min tubs 3" wide. Looks factory. ( Notch bed sheet metal behind mini tub.)

I did not want to run the spacers in rear due to added bearing stress. I know others do but thats just me)
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Old 11-24-2018, 09:43 PM   #7
caseyjones
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Re: Explorer rear and wheel backspace question

Thanks guys. I'm still looking for folks that know their wheel width and backspace, and can confirm spacer width...and used the explorer disc brake rear. I'd love to go out and measure my truck, but it's stashed in the back of my dad's shop in S.D. and i'm in OR...
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Old 11-25-2018, 12:34 AM   #8
whitedog76
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Re: Explorer rear and wheel backspace question

Currently, I have 6.5” wide rims with 4.25 backspace on my 54. I still have the stock axle, which is around 62”. Anyhow, the wheels are about as centered as it gets in the wheelwell.

With that said, I’m thinking you would want a 4” but no more than 4.5” backspace wheel. Of course it all depends on the tire and over all width of rim you’re using.
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Old 11-25-2018, 01:47 PM   #9
mr48chev
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Re: Explorer rear and wheel backspace question

Some times you have to sneak over to the other side of the road to find info. Checking over on the Ranger Station shows that the Explorer 8.8 is 59.5 inches wheel mount to wheel mount. It gives other info on the rear that one may or may not need too. https://www.therangerstation.com/tec...lorer8_8.shtml

The stock bed is 50 inches inside or about 50-1/8 on the outside Personal experience says 1/2 inch clearance isn't near enough.

59.5 minus 9 for a 4.5 back space leaves your rims less than 1/2 inch from the bed sides with no tires.

You can play with this chart and figure out what the width of a tire should be on a certain width rim https://tiresize.com/tiresizes/265-45R20.htm You have to plug in your correct size but it is a handy tool for what you are trying to do.

I'm not a fan of spacers but the ones that Jweb suggested are the way I would go. They seem to do a lot with the pro touring brigade and a few searches lead me to them almost every time.
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Old 11-25-2018, 02:25 PM   #10
caseyjones
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Re: Explorer rear and wheel backspace question

One piece missing...what’s the width from bedside to inside fender lip? I want to make sure I’m not pushing the wheel too far out. Based on another’s experience, using an Explorer rear, 8” rear wheel with 235 wide tire, 4” backspace and 5/16” spacer got him where he wanted it...so accounting for the extra backspace on my wheels, a 1” spacer will pull the wheel in only 1/8” per side...good enough for me. Now I’m looking for some real world confirmation...maybe even photo evidence...
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