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The red one is the 19" frame and the others are 17". Hence why the frames look different.

That depends on whether it'll clear the frame. Only one way to find out.

The chains used on 10sp and 11sp are different. So you should get the chainring to match the speeds on your bike.

39T. We found 38T to cause interference (chain hits the spider) when used with the stock spider.

Should be an easy swap. Just look up the chainring mounting pattern and you can order one.

Great question. Here's how a cadence sensor actually works: On regular bikes, there is a magnet (that is usually attached to a moving part like spoke/pedal) and a sensor (that is attached to the frame of the bike). In this case the sensor indeed works like a switch which turns on or off...

I had missed this detail. Yes, not using the gears properly would indeed cause driveline issues.

You're going to enjoy riding this bike! Happy trails!

It's just temporary stock. The Ultra Duos that ship in March /April will have 52V integrated battery and optional 52V range extender battery.

Firstly: Ryan isn't a part owner of Biktrix. You're definitely wrong on that. Second: have you tried replacing the chain? We could buy you a replacement. Or if your LBS replaces it, we can reimburse you for it. Just send us the receipt. Third: our terms of service is literally on every page of...

Nah. All DPC18s have them.

DPC 18 has an ambient light sensor, so they come on automatically in the dark.

If you email us at [email protected] we could look up which bikes the dealer has and let you know :P

I would have to admit, I've never come across one like this.

No comment. I rest my case.

Clearly, you're the only smart guy around and we're all just idiots and salesmen. The bike didn't work from day 1 but it magically has 2000+ miles on it. You'll be notified by email when the 3rd replacement torque sensor arrives. I bet in a few months it'll magically have the same issue as...

Hi Sic Puppy, Thanks for making your detailed post. I didn't read all of it as the bold hurt my eyes, but what I gather is this: - You bought a Swift from us (for $1700) - You discovered that the torque sensor had 2 issues: 1. When coasting, not pedaling, the motor may kick on for a second or...

Send us an email and we can arrange a replacement hub.. [email protected]

Can you insert the axle in there when the wheel isn't on the fork?