Wow, I’d be surprised if you would want a large…. you’re 5’11. The medium’s a very long bike as it is. Longer than most large bikes, the ETT is looooong, and the reach is up there with Mondraker.
Unless you’re pinning straight downhill on wide tracks, I’d have thought you’d feel like a passenger on a large., and it’s be a PITA in tight turns.
640mm ETT, and 460mm reach.
A large Enduro is 611mm and 445mm. The XL is 641mm and 465mm.
So you’re effectively going up two sizes, not one – compared to Specialized Enduros (which have also become longer over the years).
The wheelbase is huge on the large too – identical to a Transition Smuggler 29er in XL – which from experience is a big bike.
Where are you gonna be riding?
Chapaking and other guy – which year Reign’s do you have?
Some insight here: http://www.pinkbike.com/forum/listcomments/?threadid=175332&pagenum=1