My gut is telling me: Don't do this.
The thing about CF-- as I understand it-- is that it's extremely lightweight and durable and very safe when subjected to stress from the vectors it was designed for.
At its simplest level, this is why CF works for airplane hulls and not for submersibles, or why earlier CF bikes were often great on the road, but experienced structural problems when dropped, or after relatively trivial accidents. And just at a glance, the Addict's frame seems kinda exotic; it's not JUST a superlight CF frame, it's a hyperlight, with some very thin spots. I'd be nervous putting any kind of motor on any part of that bike. Sure, the motor on a hub drive is on the wheel, but...
Is the rear triangle designed for the added force? Would that really be the same as if you were just, like, twice as strong as you are?
I don't think anyone can give you a fair and accurate answer to that question.
Ebike motors are, basically, a little weird in terms of how they place stress on a materials. Rotational energy is always weird, right? I split a TSDZ2B motor housing-- and that's steel, I think-- doing almost nothing, just puttering along on level terrain in power assist level 1. It was an unusual build, but not radical, and built by someone who really knew what they were doing. The only things that were out of spec were that the bottom bracket was wider than recommended, and the chainline was not great. It's possible I just got a bad one, that the metal in the housing was no good, but I think a lot of little factors just stressed the motor housing in ways it wasn't designed for.
I also blew up a 250W front hub motor, probably from climbing hills that were too long and too steep. It was probably all of about 40nm, and I found it perfectly serviceable for grades of 20% or so in granny gear, plenty of power. Like the mid drive, it took about 700 miles to fail. It showed no signs of problems until the last 50 miles or so. My buddy weighs about 40 pounds more than I do and he's very strong; we were just asking it to do something it was not designed to do.
I will rebuild the mid-drive eventually, probably with a DM02. The front hub motor on the other bike cost me $450 or so, I had a lot of fun with it, money well spent, lots of good memories.
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I mean, I get it. I'm a weight weenie, too. When I dropped 2.5 pounds from my 49 pound, 40nm, 250 watt eMTB, it was like a different bike. I took it up mountains, got it up to 40+ MPH downhill speeds, I can carry it down stairs more easily. I'm still crazy about it. Of course I'm tempted to drop more. I looked at a new fork today; at 44 pounds, my bike would be such a monster...
That would cost me about $1,500. And it might be worth it. CF wheels, going with tires that are .1 or .2 inches thinner... that might get me to 42. That's another two grand. At that point, having already spent $2,700, I'm up to what... a $6,000 42 pound eMTB... and I could have bought a 42 pound eMTB off the shelf for...
About $6,000.
If I were you? I'd get a second bike, or build a second aluminum bike, definitely with a steel fork if you want a front hub drive. (And by the way, I *loved* the way this particular relatively light-weigh, low power front drive handled. Lean it way the hell over on a decreasing radius curve, hammer down on the pedals and punch the throttle, and you can exit the turn at astonishing speed. IMHO, if you go front hub, and go too heavy and powerful, that's when you have the weird handling issues.) Having two bikes is great, particularly when a friend comes to visit from out of town, when one of them is in the shop, etc.
Not what you want to hear, I know.
