It's Electric! A thread for e-bike things.

I didn’t either! Will need to be careful in future I suppose.

With my Grin system I did make the mistake of ordering Higo/julet instead of “cusmade” for one of the cables

did we talk about this?

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I need to watch the whole thing but I imagine that rides really spooky. You would still have your front brake like normal but your rear brake would just activate regen. I’m really just not sure regen on an e-bike is worth it for most cases.

I was reading subtitles but sounds like it regens while slipping and grabs when you grab

Haven’t watched the video. Just want to say that regen for bikes is not worth it unless you’re coasting down a hill for like 10 minutes.

There’s definitely someone who did a study that will contradict my opinion tho

I saw somewhere around 10% increase in range with regen setup for an All Axle front motor according to the Cycle Analyst data just doing normal braking. That probably meant another 5-6 miles per charge in range. Those weren’t long sustained braking events, probably not more than a few 5 or so seconds long on each ride, mostly just a lot of small ones.

I eventually got to the point where I was using the back brake only. Squeezing that brake lever triggered the regen braking at the front wheel and it felt pretty normal for whatever the defaults were set to for that.

I think on a dedicated electric motorcycle it can make some sense. But on an actual e-bike I am guessing you can increase your range a lot more by pedaling more and moderating the amount of assist you use. The regen is your legs and those have gotta generate more juice than regen braking.

Like Jake says tho it could be a cool option to have on a touring rig where you could get yourself some extra juice on descent and tailwinds but you’d probably only break 10% by using the assist very judiciously

Sure, but that was additional range that showed up without me having to do anything other than the braking I would have done anyway. I don’t recall what the default regen rate was set to, but I routinely saw it generating 500-600 W during braking. It was noticeable when it kicked in, but wasn’t intrusive or overly powerful (at the default). It just felt like applying the front brake. Now they have ways to control the regen rate during braking that could be fun to play with.

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Come to think of it, I am probably not going to be the target for this for a while. I think I charge my e-bike about once a month right now. But if there was a way to haul a cooler on RAGBRAI, get some help with hills, and not have to hunt for outlets every night, that would be sweet…

I love regen on my Grin all axle. I’m just using it to aid in braking not to actually recover energy. With the Magura brake levers ive got the regen kicks in with virtually no force applied.

Grin made some firmware changes to the Superharness and I got my hands on a new one. They also found some problems with the default parameters in their baserunner controller for use with the superharness. Between the two updates I’m cautiously optimistic everything works now.

Then, the same day, I dropped my 52v 20ah 1000kw battery pack and broke the case open. Fuck. Now it’s held together with electrical tape. Replacement case is only $75 shipped but I don’t want to deal with swapping the pack over.

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Dang that sucks. Is it just the top cover that’s cracked?

Swapping the top cover over isn’t that difficult. The battery I ordered from them in the same DP9C case got cracked during shipping so I got to do that three years later after the spare cases were finally back in stock again, including one false start when they listed the DP9C case as back in stock only for it to be a smaller DP6C case once it arrived (they refunded the entire purchase including shipping).

All the molded fittings broke from the top/bottom half. The actual housing is fine but there is no way to keep the bottom attached to the top for about 2/3 the length.

Good to know swapping the housing wasn’t too hard. Glad you got free shipping. I had to pay shipping both ways to get my new Superharness even though my first was defective.

That’s pretty lame of them.

My replacement case should have been comped by them because it was their packing that led to the issue. But, early pandemic bike boom meant stuff was in short supply and I never followed through with it years later when they were available again.