Thanks for making E-Biking safe again. I’ve heard so many stories about Chinese torque arms failing and people ending up in the hospital. In the best-case scenario, only the cables are damaged.
In a perfect world, nobody would have to buy torque arms because every hub motor would have one built in. It used to be like this in the late 1990's and early 2000's, but then China came around and ruined it with axle flats and for whatever reason that terrible design standard became the norm for the past 20 years.
We run a couple of Bullitt cargo bikes on our delivery fleet which I upgraded to this torque arm and I can definitely say it was a huge improvement. Clever design, as usual from the Grin Tech folks.
On my bike I just tightened some hose clamps around the axel and through some holes that we conveniently already there so that axel can't fall out of the dropout. It doesn't look the cleanest but it works.
@@alexvonhoene1391 Falling out is the only problem I've had. It wears away the opening when it spins as it's falling out but doesn't spin unless it comes out.
How do you get high power regen? I have your Brompton kit with the 20A controller, will I get more regen with the Phaserunner? I'm hesitating to buy it ;)
If your reference point is with a Grinfineon 20A controller, then yes you will get way stronger regen braking if you upgrade to a Baserunner_Z9 controller instead. Is this a really old kit with anderson connectors or a less old kit that has the Z910 plug on it?
Hello, I've been thinking about buying lightweight ebike but I don't know which one. I really like the Hummingbird ebike because it's featherweight and will be easy to fold and bring up and down stairs and on the subway. They use a 250 watt Zehus all in one motor/battery hub. It's super compact but the weight is entirely on the rear of the bike. Coupled with your body weight the bike isn't balanced. The benefit is that there is no external battery. What's your thoughts. Is there a way to take a Hummingbird, a Brompton T-Line, or a Birdy and make them into ebikes without external battery packs?
In general you want an external battery pack, it is much more versatile than one integrated with the bike. This has nothing to do with the subject of this video though (v7 regen torque arms)
happy with mine but I did have to TIG weld the torque arm to the clamping block. I think it's because the road bike fork itself flexes more than expected for the part... still plenty happy with it 😊
In an ideal world there would be no torque arms like this, they would always be integrated with each hub motor. That said you can put on two arms for sure, many people do. It's not generally necessary, but it does provide some extra redundancy
One should be enough for most applications. If you're going to be running a system with very high power and powerful regen then 2 isn't out of the question.
The front, because the weight shifts to the front wheel(s) under braking so you can harvest more energy. Front wheel drive EVs make more sense for this reason, although many are rear wheel drive.
It really makes no difference at all, unless you are at a point of loosing traction control and have to back off the regen because of that. In practice you basically never run into that in biking conditions riding on pavement. Emergency panic stopping, like the kind that favors a front wheel over the rear, is the domain of your mechanical brakes.
We don't follow the logic. This can go either in front of or behind the fork. The torque is totally bidirectional in a regen system, so it makes no difference whether it is in front or behind as far as if the force is pulling on the hose clamps vs pushing into the fork blade.
This V7 arm if it's a motor that does regenerative braking and has at least an M14 axle. If you aren't doing regen, then the V5 or V6 arms are both quite good depending on the install location.
