Hi Rab
That does make sense thanks, I never thought about what the small mill in travel on the shock affects to the actual wheel travel.
The only issue I currently have is looking at the SRAM website for the new Monarch Plus they offer the following:
216x57mm, 216x63mm with Specialized mount,
Looking into the specialized mount it’s commented that – Specialized bikes have non-standard shock mounts as well a their Autosag feature
So I have no idea if that will fit an Alpine 160? lol