Join Date: Nov 2001
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Re: shackle reversal or not
If you have stock springs with no lift, you don't want shackle reversal. Because the springs are nearly flat already, the axle moves to the rear when the tire hits an object which is the desired reaction.
If you have spring lift, then there is a spring arch. When the front tire hits an object, the spring compresses which flattens it and the axle moves forward, so a shackle reversal corrects it.
So, nearly flat springs - no shackle reversal. Arched springs - shackle reversal might be good.