Hi There ES Peeps,
I've been searching around to see if there is already a thread for this issue and haven't found anything. But if it's already out there, please let me know.
I own a somewhat modern steel cyclocross bike. As such, as a general rule, I use cranksets with integrated spindles and outboard bottom bracket cups (i.e. Shimano Hollowtech, SRAM GXP, FSA MegaExpo, ect.). However, pretty much all the e-bike products seem to made for square-taper BB's. Specifically, it seems like all the PAS sensors on the market are designed around square-taper BB's.
So has anyone seen PAS options for outboard BB Cups? Either DIY or production versions?
From my research so far, I couple options:
1) Chainring mounted magnets - http://www.ebikes.ca/shop/electric-bicycle-parts/torque-sensors/pas-12p-chr.html
2) Drilling out/Gluing on a split magnet ring - http://www.ebikes.ca/shop/electric-bicycle-parts/torque-sensors/pas-12p.html
2b) I imagine you could also easily sandwich this "ring" style sensor behind the outboard bearing cup as an alternative to using the cable-tie mounted sensor from the previous links - http://www.elifebike.com/peng/iview.asp?KeyID=dtpic-2012-8K-RJ9Q.3M8TH
0) This sensor style also seems intriguing, but no idea how you could make it work with external/outboart BB cups - https://bmsbattery.com/ebike-kit/705-dual-hall-sensor-12-signals-easy-assembling-pas-ebike-kit.html
I suppose I'm just surprised by the lack of options at this stage in ebike evolution. There are a ton of modern cranks (maybe the majority?) using integrated spindles - either 24mm or more recently 30mm. The options above could work, but if you've got a nice integrated spindle crankset, gluing isn't an attractive premise. And chainring bolt circle diameter (BCD) standards are all over the place these days (annoyingly). Definitely limits your options
I've been searching around to see if there is already a thread for this issue and haven't found anything. But if it's already out there, please let me know.
I own a somewhat modern steel cyclocross bike. As such, as a general rule, I use cranksets with integrated spindles and outboard bottom bracket cups (i.e. Shimano Hollowtech, SRAM GXP, FSA MegaExpo, ect.). However, pretty much all the e-bike products seem to made for square-taper BB's. Specifically, it seems like all the PAS sensors on the market are designed around square-taper BB's.
So has anyone seen PAS options for outboard BB Cups? Either DIY or production versions?
From my research so far, I couple options:
1) Chainring mounted magnets - http://www.ebikes.ca/shop/electric-bicycle-parts/torque-sensors/pas-12p-chr.html
2) Drilling out/Gluing on a split magnet ring - http://www.ebikes.ca/shop/electric-bicycle-parts/torque-sensors/pas-12p.html
2b) I imagine you could also easily sandwich this "ring" style sensor behind the outboard bearing cup as an alternative to using the cable-tie mounted sensor from the previous links - http://www.elifebike.com/peng/iview.asp?KeyID=dtpic-2012-8K-RJ9Q.3M8TH
0) This sensor style also seems intriguing, but no idea how you could make it work with external/outboart BB cups - https://bmsbattery.com/ebike-kit/705-dual-hall-sensor-12-signals-easy-assembling-pas-ebike-kit.html
I suppose I'm just surprised by the lack of options at this stage in ebike evolution. There are a ton of modern cranks (maybe the majority?) using integrated spindles - either 24mm or more recently 30mm. The options above could work, but if you've got a nice integrated spindle crankset, gluing isn't an attractive premise. And chainring bolt circle diameter (BCD) standards are all over the place these days (annoyingly). Definitely limits your options
