The years are moving by and my first build has done really nice, but it's time to replace it. Thanks to all here!
These frames lend themselves extremely well to mid direct drives, imo, since I was able to pull one off my first go lol. Anyway, same idea and motor, motor mounting method, dual FW, and URT extension principle/geom.
I have not had the necessary practice with aluminum to chance messing with the frame for extension so I will do a similar bolt up bracket to push rear axle back ~6".
The newer and supposedly stronger Mantra frames are a breath of fresh air for me. I think they managed to lighten it while really changing geometrical components and construction. I think it will be stronger and lend itself even moreso for a nice little XC racer.
Larger and more squarish (but lighter) fuselage, reinforced headtube, and a completely redesigned rear triangle and added disc mount and removable hanger will all be very useful. . .
After >20years of the old style frame as my primary bike, this will be a match made in heaven! ( . . . or hell - or wherever I'm headed heheh)
< 70lbs w/ >900wh and > 7.5kw battery/controller capable (till motor saturation).
Similar final gearing of around 40mph for now.
Longer wheel base than before for better control
Wider drop outs for a better and stronger dual FW hub, possibly sealed bearings, and less wheel dish
Wider Urt/extension for ~ 3" rear knobby
Over all slightly more refined controls, more and better lighting, and that's about it for now.
I'll update as it progresses with links pics vid etc, as I also plan to do for the fatbike build.
Any tips or questions are welcome, thankyou!
Background: Since my second build, a 2wd traktor of a bike (mongoose hitch), I realize I made the right decision with my first bike and build as a primary. It's way lighter, more powerful, nimble, efficient, and way more fun for more situations. Granted a fat bike cruiser (esp 2wd) IS more versatile in varied riding condition like mud snow beach etc.
So: I will be working towards refining several aspects of the orignal mantra build, on a fresh and updated mantra urt frame.