If you mount in the triangle use the strap. Otherwise the motor will move back slightly under torque and tighten those B.B. cups to a point they’ll never come out.
Your build is close to my heart. I actually begged Dave for a 100MM adapter years ago and built the first Tangent powered (3KW) fat bike. These days I'm running a 6KW Tangent All mountain setup. I've tried all kinds of gearing combinations with these bikes, and have a pretty good feel what...
I ran some BMX half link chain for a while and it worked fine. Super heavy stuff.
https://www.amazon.com/KMC-HL710L-Half-Link-Chain/dp/B003UPZF7A/ref=sr_1_1?ie=UTF8&qid=1523798570&sr=8-1&keywords=bmx+half+link
So I've been riding around with my Cycle Analyst limited to 990A for a few rides by accident.
Seems when you switch to "High Power" mode on the Cycle Analyst it multiplies the amp limits by 10. Luckily my pack is only rated for 140A and the Cycle Analyst recorded only 158.8A (8200W) as a...
Here's the link to the stainless steel narrow-wide 30T or 32T rings from Wolftooth.
https://www.wolftoothcomponents.com/collections/stainless-steel/products/104-bcd-stainless-steel-chainrings
Fair warning, the 32T is your best bet. The 30T will work fine too until the chain does one day drop...
I haven't used the smaller wolftooth chainrings (74bcd), but the 32T ring I have installed now is much much stronger than the SBP 24T Dave sent me. I mangled the teeth on that thing in 2 rides and had to take it off when it wouldn't hold a chain anymore. I've also used their aluminum 42T...
I get about 400 miles out of a raceface 32t aluminum narrow wide. It’s not even totally shot when I replace it. I recently switched to a stainless steel drop stop 32T from Wolftooth. It’s the only steel narrow wide I know of. 100 miles or so on it and no signs of wear yet.