Those dragons are nice frames!Have a 2006-ish 26" Jamis Dragon. Front shock is equally as old (SID) and in need of some almost non-existent parts. So got me thinking of just buying another. Which got me thinking about a mullet since 27.5 stuff seems more available than 26".
The Jamis set up with the factory 100mm Fox32 has a HA of 70.5 and Seat angle of 74. Non-tapered steerer, hydraulic disc brakes.
I've read up on changing over and how it could raise the front end more than desired. So my first thought was finding a 80mm 27.5 fork to offset the extra tire meat. But that seems to limit one to cheap Suntour forks only. I did find a rough estimation in an old article that said for every 20mm of added travel, reduces the HA by 1 degree. With my factory HA being 70.5, it seems I have a little play room. A 100mm travel 27.5 non-tapered seems to have a little more options as far as forks go. Maybe putting the HA in the 68-ish range once you add increased tire size.
I know axle to crown measurements also factor in, but those are tough to find unless you have the fork in-hand.
Anyone done a 27.5/26 mullet on an older frame and have some insight? Or maybe someone with more geometry sense to shed some light. Am I onto something that could work, or am I misunderstanding everything and should just buy an old used 26" ROCKSHOX off eBay for $300+ and hope it doesn't break?
Since riding style/location plays a role. Mostly just single track/trail. Roots, some rocks, sand, short hills with incline and decline.
The straight steer tube is probobly going to end the project.. I dont think a good or even descent option is out there.
Id get a 120 open bath marzocchi and ride it another 20 yrs!!