There's a thrust bearing at the lower end to allow the shock to turn without any friction in regards to the spring. See disassembly pics...

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Comment by Taylor Ogden on April 3, 2012 at 5:29pm

Yes, it's an AFCO shock.  We opted for the steel one for cost, weight would be slightly lighter with an aluminimum bodied shock.  We're about 6 pounds on the conversion, but need to subtract the weight of the bungee cord...

Comment by Scott Ehni on March 26, 2012 at 8:25am

looks like an AFCO shock.

Comment by Victor Menkal on March 24, 2012 at 6:35pm

Awesome cool, nice engineering!

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