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Randy in ca · 03-08-2018, 12:14 AM

A little further information in this regard for anyone interested. Although all rear spring main leafs are of the same eye to eye dimension when loose, once the spring is assembled the Roadster version is actually longer (eye to eye) than others. An old catalogue I have shows the assembled Roadster spring eye to eye dimension as being 40" to 40-3/16" while those for other models range from 37-7/8" to 39-11/16" eye to eye when assembled.

In an old thread Marco Tahtaras offered the following explanation:

"As Dave attempted to explain, they only look different AFTER assembly. Each leaf moving from bottom to top has a tighter curve. That means that every time you add/clamp another leaf above, more curvature is forced into the leaves below and the main leaf spring eyes become closer together. Since the Roadster spring has the least AND thinnest (weakest) leaves it has the flattest appearance when assembled".

03-08-2018, 12:14 AM	#10
Randy in ca Senior Member Join Date: May 2010 Posts: 1,659	Re: Seven Leaf Spring A little further information in this regard for anyone interested. Although all rear spring main leafs are of the same eye to eye dimension when loose, once the spring is assembled the Roadster version is actually longer (eye to eye) than others. An old catalogue I have shows the assembled Roadster spring eye to eye dimension as being 40" to 40-3/16" while those for other models range from 37-7/8" to 39-11/16" eye to eye when assembled. In an old thread Marco Tahtaras offered the following explanation: "As Dave attempted to explain, they only look different AFTER assembly. Each leaf moving from bottom to top has a tighter curve. That means that every time you add/clamp another leaf above, more curvature is forced into the leaves below and the main leaf spring eyes become closer together. Since the Roadster spring has the least AND thinnest (weakest) leaves it has the flattest appearance when assembled".