Mathurin wrote:Oh, man that sucks about the CETMA, gonna make it work? This sounds like a good pretext to whip up some kinda torque arm while you're at it.
I've bought some 5mm stainless plate, just waiting for it to arrive. I'll try to file/drill/saw a pair of torque arms that the CETMA rack supports can bolt on to. Then I either need to hose clamp it to the fork, pay someone to weld it on or make a 'collar' that would clamp to the fork which the torque arm could mount to. I'll make it work somehow.
Plan is to mount the CA on the CETMA rack, there's a perfect place for it. Controller in the battery box hopefully.
Otherwise there's those front racks that make canti braze ons feel self-actualized, they're about sized for a 6 pack. Thing is, one could possibly do a pretty fair job of dissimulating a controller under these if it's painted black... Though they don't seem all that very useful to actually carry stuff, guess they could hold a bag/basket/briefcase if it was bungeed to the handlebars.
That does look nice and simple, probably cheap too! I really like the size of my 5-rail. Any smaller and it would not be that useful. With mine, I can remove the fence and carry even wider things. I'm using it on another bike at the moment and it is great
They look nice too. I'd like to have everything bolted down though and my ride is mostly with traffic mostly signposted at 60kph (ranges from 40-70kph).
Mathurin wrote:And hey you mentioned you intended to weigh the motor when you'd get it - did you?
Yes I did, I need to find the bit of paper I wrote the weight down on, from memory it was 3.2kg (bit over claimed weight).
Also, I read you're looking to reduce weight on it. Don't bother, the weight is in two areas: things that can't be changed as they're necessary (like windings, magnets, gears) and things that are the result of manufacturing and material selection (like the outer housing, inner motor housing, axle).
You could do small modifications but the gains would be insignificant. Most of us are using the Bafang beyond it's designed uses (36v, 10a, ~350W) so IMHO weight reduction is asking for trouble.
My suggestions would be: use high quality 14ga spokes (sapim or DT Swiss) and have your hubmotor built into the nicest (strong/light) rim for your particular intended use. Then run light weight tubes and tires. If you plan to run disc brakes, get a disc specific rim, they don't waste weight on having a machined braking surface.