Sorry didn't see your post. Daryl could explain better the difference but I know it is a lower'd spring & shock combo that is engineer'd to work with the VTX-treme products for the Fury. The spring will be designed and built with the lower rear end and stretched front in mind along with the shock. As far as specific specs on the difference of a spring used the way it was designed and one shaved would be one of those VTX-treme questions
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