MrHobbitFeet
1 µW
I am designing and gathering materials for a bmx ebike.
Should be quite the little beast: 2000 watt motor and controller chain drive to rear hub, diy built 48 V 12 Ah(576 Wh) battery, 13s4p. A bms. Disk brakes. Not fully settled on gear ratio
I need some advice on the drive-train assembly, specifically the sprocket attachment. My plan is to use the original rear tire and the chain motor will connect to a sprocket on the left side hub area.
The problem is exactly how to attach a sprocket there. I cant find a freewheel sprocket that fits the hub. The bearing is 35-15 so 35 mm OD and 15 mm ID. Axle size is 14 mm. The only freewheel sprockets I've found that fit aren't left side driven.
I'm considering welding a sprocket onto the hub itself, or using a ragjoint but these seem risky for bike longevity or loads of work.
Only thing I haven't looked into is the hub adapter clamp things. I'm not too worried about drag from the motor if i end up having no freewheel capabilities.
Anyone one with experience with a build like this have any suggestions?
Here is the hub i have. Will be installing on smaller side
Mission Pace Sealed Freecoaster 14mm
missionbmx.com
Should be quite the little beast: 2000 watt motor and controller chain drive to rear hub, diy built 48 V 12 Ah(576 Wh) battery, 13s4p. A bms. Disk brakes. Not fully settled on gear ratio
I need some advice on the drive-train assembly, specifically the sprocket attachment. My plan is to use the original rear tire and the chain motor will connect to a sprocket on the left side hub area.
The problem is exactly how to attach a sprocket there. I cant find a freewheel sprocket that fits the hub. The bearing is 35-15 so 35 mm OD and 15 mm ID. Axle size is 14 mm. The only freewheel sprockets I've found that fit aren't left side driven.
I'm considering welding a sprocket onto the hub itself, or using a ragjoint but these seem risky for bike longevity or loads of work.
Only thing I haven't looked into is the hub adapter clamp things. I'm not too worried about drag from the motor if i end up having no freewheel capabilities.
Anyone one with experience with a build like this have any suggestions?
Here is the hub i have. Will be installing on smaller side
Mission Pace Sealed Freecoaster 14mm

Pace Freecoaster Hub
The Mission Pace hub gives you a chance to upgrade to a freecoaster without breaking the bank. With sealed bearings throughout, adjustable slack, heat-treated chromoly axle, and left and right-hand drive options, the Pace hub has you covered.
