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Do any of the 'Dale gurus know, please?
Thanks.
Something to do with hubs: http://singletrackmag.com/forum/topic/lefty-supermax-compatible-hub-whats-available#post-8004073
There may be other things
According to the 1.0 and 2.0 manuals the Hubs are the same on the Supermax 1 vs 2. As far as I can tell the 1 was a 130mm 29er fork vs the 2 being 27.5/29 130/140/160 fork. I posted the below to your query in the Trigger thread. Mine also has a 3mm flange. I don't think that check, despite the bulletin, is correct.
Looking at the Supermax vs Supermax 2 manual on Cannondale site, the 1 Lefty seems to be a 29er fork with 90 to 130mm of travel. I suspect therefore that the 3mm vs 6mm check is probably not accurate. I can't see them decaling up and older model 29er fork and sticking it on 27.5. More likely they switched back to the 3mm flange head.
Regardless, the 1.0 is 130mm and the 2.0 is 140mm. If you can manual reset your lefty to the 20mm suggestion that would be 140mm travel. On the 1.0 the reset was to 35mm and gave 130mm travel.
Just spoken to TFTuned - the 2.0 is a rolling revision to the 1.0. The main difference is a redesigned bottom cap - with a 3mm deeper flange, as confirmed by the recent service bulletin. Other than that - no major differences in design, spec or performance.
In any case, the air spring replacement work under the service bulletin has the effect of bringing both the 1.0 and 2.0 exactly in line with each other in terms of internals - so no difference in performance at all after the work has been completed.
The wonderful world of Cannondale...!