Read Justin LeMire-Elmore’s take on BBS02 vs BBSHD https://endless-sphere.com/forums/vi...p?f=2&t=100461

And some feedback from other folk that ride both motors BBSHD vs. BBS02? - Endless Sphere

you should be fine with the 02 provided you use your gears, it sounds from Tom’s comment on the 2nd link the BBSHD is more able to take abuse ie taking off using throttle in mid-high gear going up hill.

Personally I would support a retailer with a decent stock of Bafang spares. I bought a 2013 BBS01a from California Ebike and needed to change my controller at the start of 2017 8 months after Bafang changed the design without informing their US retailers, but Doug Snyder kept enough on shelf in stock for his customers that bought from him that I was able to get a replacement, subsequently I bought a BBS01b motor going cheap for when mine wears out as now the a model controllers are hard to find. Point being you won’t get that level of support from an Amazon seller.