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Nice. My S2 seems to be working reliably, and with other issues arising + our Montreal -> Ottawa -> Toronto ride coming up quick, I put any switch plans on hold. And really, S2 + rubber band I can slide over the boost button is an arrangement I can live with for now. Primary "other issue" =...

I may well do that, and having assembled some amp & preamp kits over the decades, soldering's more in my wheelhouse. Do you know where I can find a wiring diagram / description? Another connector fairly near the control end would add a lot of convenience: I could simply disconnect the cable...

Thanks yet again. It makes sense the 4" version would be stronger than the 2.75" I'm using. Two reasons not to switch: (a) It's too clean and sensible, not something one would call "crackpot" or "harebrained." It'd feel too out of character. (b) And oh yeah, there's only about 3.55" between...

That's the 64 thousand dollar question I hadn't really considered until an hour ago when I attached this assembly once again to by bike and noticed the force holding motor to tire was less than I expected. Can't say for certain it was less pressure than in earlier attempts, but it was the first...

Thanks. Stainless, and confirmed my cheapo "high speed" bits got nowhere. I had +some 1/4" aluminum intended to make a sturdy platform, and had plenty extra to fashion a hinge-to-motor adapter. This assembly now feels rock solid. But you're right about needing a more stable attachment than...

Predictably this project has me repeating "this is why I'm a software guy." Bolted hinge/motor assembly to strap But even this non=flexible nylon strap, tightened as much as I could manage on the bike, twisted a lot with the tension of the spring hinge. Clearly I either needed to use a very...

Getting close. 3D printed adapter seems fine, and simply bolting it to a stretchy velcro-based strap seemed like it'd be plenty secure on the bike. But the strap's flexibility gave the assembly too much freedom to easily rotate in multiple planes (viewed from above, viewed from the side of the...

Ha, I understand your lesson only too well. Just had an email exchange with the 3d printer (which I farmed out via a site called craftcloud) - at first it sounded like there was some weird problem and he needed me to revise the CAD model, but I think we've clarified that there's just a rough...

Yeah, I abandoned the idea to drill my hinge to mount directly to the motor, and then also had to return some brackets I thought might serve as an adapter but didn't quite fit. Considered a few other options but ended up designing an adapter to have 3-D printed, which should arrive any day now...

Do you think the Pro would've made a big difference for you? 33% higher rated power sounded nice but not necessarily game-changing to me - I was also interested in the regenerative braking. Brake overheating is a hazard for tandem bikes - with double the weight on the same two wheels and rim...

Hose clamp like that was an early thought I might return to. Seems like it'd be very secure. But I'll try something like this lashing strap first: which would be easier to put on & remove. Rather than rely solely on friction to hold the hinge in place, I'm tempted to glue and/or bolt the...

Pro. It's been what we've needed for the hills where we've ridden. I'm sure its limitations would come into stark focus in more rugged terrain. Thank you for the truss clamp! That QR could've been extremely useful in place of the Strida adapter, wedged as it is into a very crowded spot which...

That's one advantage of mounting the QIroll on a tandem: I can keep looking forward while my stoker (11 year old daughter) looks underneath. 😄 Our Bike Friday "Twosday" tandem folds up into a carry bag - that bag is big, heavy, and awkward, but it lets us get the bike onto trains, buses, and...

Thanks Dewey. I knew about BF's front hub solution, and your suggestions prompted some additional reading and learning. Mid & hub drive seem like better choices for most use cases, but add more weight to an already heavy rig than I'd like. Mid-drive is additionally complicated by the...

I have an older Bike Friday Twosday tandem, which mostly works great for touring with my nine year old. Only major issue is climbing hills - given our power & the loaded bike's weight, really need a little boost. Adding minimal weight is a high priority: carrying the bike folded up in its bag...