Calculating Available Back Spacing of Trailer Wheels with Negative and Positive Offsets

Updated 04/13/2012 | Published 04/12/2012

Question:

I would like to know the backspacing on the AM22691 Thanks

asked by: Ron W

Expert Reply:

The Americana Star Mag Trailer Wheel, # AM22691, has a positive offset of 5 mm. This means the mounting surface of the wheel is set 5 mm to the outside of the wheel from the zero offset mark or moves the tire closer to the center of the trailer. This wheel has 3-1/2 inches of back spacing at the zero offset mark which translates to 88.9 mm. Because it has a 5 mm positive offset you will add 5 to 88.9 which is 93.5 or 3.68 inches.

expert reply by: John H