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How to Determine Hub Face to Hub Face Dimension for Picking out Replacement Trailer Axle  

Question:

what would be the length of the axel tube for a 58 inch spring center bt8 to make clearance for a 5 foot wide trailer tire clearance. 13 inch tire? thanx

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Expert Reply:

If you are looking to order a new axle for your 5 foot wide trailer you will need to determine what the hub face to hub face dimension you would need to clear your trailer that is 5 feet (60 inches) wide.

You will also need to know the width of your wheels/tires. You will take the figure and divide by half as trailer wheels have a zero offset which means exactly 50 percent of the tire width will be on either side of the hub face. You will want to have a couple inches of clearance between the wheel and the frame of your trailer so you will want to take 4 inches plus the half the width of your wheel/tire and add that to 60 inches and that would be the hub face to hub face axle dimension you would need.

expert reply by:
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Jameson C

Monisha T.

6/29/2020

I m building a trailer of 10x 6 with 3500kg . Tyre is 215/75R15 . correct me if I m wrong with dimensions: chassis width : 70" face to face : 85" what will my tip to tip measurement be?"and my axle length??? backspace s 4.75

Etrailer Expert

Chris R.

7/3/2020

When you state a "face to face" measurement of 85", are you referring to the axle's hub face length? If so, this essentially marks the halfway point of the tires on each side of the axle, so if you're using 215/75R15 sized tires, you're looking at a total trailer length (including the tires) of about 93-1/2".

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