xtraycle edgerunner w/ bionx now or wait for Bosch drive?
I live in a bike friendly and hilly town (ashland OR) and am thinking about adding a cargo bike to the fleet. Primary use would be delivering my 3 & 5 year old kids to school and fetching groceries. I'm sold on the edgerunner with its 20" rear wheel and lower rear center of gravity. The question is do I go for the current bionx wheel drive bike or wait until spring for the edgerunner with Bosch mid drive system?
I've been told mid drives are much stronger/w more torque for loads in hilly areas. I was looking at stoke monkey and Urban commuter store mid drives myself. How much will the Bosch run?
Not sure yet of the price with Bosch, but it will certainly be more than the bionx.
Originally Posted by NordicNorm
Hub motors are going to be more reliable than a mid drive unit but a mid drive allows you to turn a one speed motor into a multispeed motor.
I have several E-bikes that I use in our electric assist bicycle touring business and I use the Baffang 500 and 750 watt mid drive units that retrofit to most existing bikes.
On the Wattwagon we developed we use a 1000 watt 16 inch hub motor and it climbs very well and has great top end. In fact I now prefer the hub motor (direct drive unit) for it's quietness, torque, speed, simplicity and reliability.
I would think with the extracycle if you are using a 20 inch rear wheel that the torque and power of a direct drive hub motor should fit your needs and save you a bundle of money.
The Bosch system is only 350 watts and requires a dedicated bottom bracket assembly. The Bionix is pricey and uses a lot of proprietary stuff.
The Baffang mid drive will retrofit to most bikes that have a 68 or 73 mm bottom bracket shell.
Direct drive hub motors are readily available, but I would stay away from those with internal controllers.
I don't understand the StokeMonkey- you have to hold the throttle down with your thumb the whole time? Why would I add 30-40 lbs of StokeMonkey to a Big Dummy that I already have two kids on, just to only use it when my thumb is holding it down?
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@richwolf, the bafang may have the power but the lack of sophistication (ie torque sensor) and real warranty knocks it out of contention for me. FYI the bosch is rated at 350, but can provide bursts of 500 watts.
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