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

A+ car bike combo.

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needs a foldable ramp that you ride up from behind

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5lb over the weight limit for this rack, so I didn’t get on the freeway :face_with_peeking_eye:

it’s kind of a clean and jerk to get a bike up here lol

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Just because it didn’t occur to me the first time I had an e-bike I’ll mention: removing the battery definitely helps!

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Maybe I should be in here? I dunno!

Anyway, rode off my street for the first time this evening and immediately grenaded the quick link on the… 8 speed KMC chain?!

I threw on a campy 10 from my parts bin and now it is skipping lol. I think that the gears and chain need to mesh.

But also: ebike chains exist. Should I buy an ebike chain?

I can’t tell you whether or not to buy an ebike chain, but I am still using whatever 10s chain I’m assuming came stock on my big dummy. I haven’t had any issues with it, but I’m also not hooning around on my dad bike. Chain has lasted a weirdly long time on this bike too, previous owner miles + ~2000 acoustic miles + ~2500 electric middrive miles.

I think if you are going to max out the assist it might make sense to get an ebike chain but otherwise I wouldn’t worry about it

Ok, yeah I assumed regular ol’ chains were fine.

Next step is to figure out what chainring/cog ratio I’m supposed to be running with this enviolo hub. The previous owner messed around with those and I don’t know what should be on here.

How do you like the hub?

For a bike like this it’s fine. I liked the way that this bike felt with a derailleur more, but a bike mechanic friend told me that I’d shred a cassette in like 500 miles. The decrease in maintenance I guess is worthwhile. Not riding this for crispness or acceleration or whatever. If anything makes me swap this out for a derailleur drivetrain, it’ll be the goddamn grip shift. I wish someone made a fancy grip shift for this system.

i bet you could growtac it!

that’s just drop bar ain’t it

yeah, but

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Just going to pop in and say that Biker Boyz was just me and one other dude tonight, so I loaned him my wife’s REI bike and I took my E-Dummy and we rode to a brewery that is a little further and hillier than we usually do and it was quite nice

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Watched the 2nd half of this the other day:

The way he build his ā€œcarā€ is pretty lol and theoretically there isn’t anything too crazy about this but I thought it was cool. It pretty much works even when the vehicle is constructed in the dumbest way possible. Like if you had a pedal-assisted tadpole trike with an aero fairing, how large of a solar array would you need to keep one of those things rolling along at 20-25mph in perpetuity? Weather permitting of course.

I believe we have a tarcker who did solar vehicle competitions at uni

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hello

modern good solar cells? Not a lot. 2023 World Solar Challenge cars were limited to 4sqm of terrestrial-grade solar cells (no multi-junction gallium arsinide bullshit), and averaged 45-55mph across the outback for 5 days straight, no pedal assist needed.

ballparking: power goes with V^3, so if you only wanna go half as fast, you only need 1/8th as much power. So with a streamlined velomobile, you should really only need half a square meter of good, 25%+ efficient solar cells to cruise at 20-25mph all day.

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How much does weight change the equation here? I’m not personally interested in building such a thing but an e-touring bicycle with a solar trailer would be a pretty cool thing under some circumstances, but I’ve never looked at those velomobiles and thought ā€œyeah I want to be in one of those all day for a weekā€ lol

it matters, how much it matters depends on how good your tires are. with low rolling resistance tires it won’t matter as much. but rolling resistance is generally pretty poorly understood, imho it’s often the achilles heel of these youtuber solar cars.

with an un-faired upright bike, aero drag would surely be the dominant force

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So, I’ve placed an order for a bike but it doesn’t come with lights. It has the Bosch cargo motor. Anything specific I should look at or just pick something from B&M or Supernova?

Look for an ebike compatible light.

I believe different motor brands have different plug adapters but I’m not sure how that works tbh. I assume that either the light or the bike will come with what you need, esp. for a common motor like a Bosch.