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Pinion Offset

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2. The first step to the build is figuring out how wide an axle you want and the pinion offset. We decided to mimic a Ford high-pinion Dana 60 and shot for 691/4 inches from wheel mount to wheel mount, and we wanted to mount leaf springs at 31 inches on center, and this resulted in our pinion being about 6 inches offset from the center of the axle. Luckily Spidertrax has both an online measurement calculator and great telephone service and helped us determine where to cut the axletube so that they had the proper knuckle engagement and overall width.