goldbrick
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Re: Anyone into electric cycling? Electric Bicycles

Sat Sep 28, 2019 8:41 pm

I would first check to see if the disc rotation is parallel with the plane of the center of the bike. This probably isn't trivial but if you install the wheel in both orientations and check the disc alignment vs the fork stays then it should be possible to measure (assuming the frame is straight and has a symmetrical design). If that is not OK then the wheel probably isn't properly seated in the frame. If it is OK then the caliper must be bent or incorrectly installed. If it's a steel frame I would just bend the caliper mounts into position until the brake works correctly. If it's a aluminum or carbon frame I'd try to shim or file the mounting points to align things correctly.

V-brake levers had a different pull ratio than other rim brake and mechanical disc brake levers but I assume everything on the bike is original equipment so that shouldn't be the issue. If the brakes are hydraulic then obviously this is irrelevant.

LeftieBiker
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Re: Anyone into electric cycling? Electric Bicycles

Sat Sep 28, 2019 9:07 pm

I'm still quite Po'd at Magnum for stringing me along, getting me to record the various loud noises my Metro is making, and then...blowing me off. They just ignored the three emails I sent them after sending them a link to an audio-only YouTube "video." Hmm, I'll dig that up and post it here, for those who'd like to hear a year old Magnum hubmotor...


https://www.youtube.com/watch?v=CjGRAeexzB8&t=65s
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GRA
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Re: Anyone into electric cycling? Electric Bicycles

Sat Oct 26, 2019 4:24 pm

GCC:
Department of the Interior pushes for clear, consistent e-bike policy for public lands
https://www.greencarcongress.com/2019/1 ... 4-doi.html


Pedelecs only except areas open to motor vehicle traffic, <1 hp motors, "low=speed" (not defined in the article, but presumably around 20 or else 29 mph, although I don't consider the latter "low speed" when mixed with regular bikes not ridden by professional racers.
Guy [I have lots of experience designing/selling off-grid AE systems, some using EVs but don't own one. Local trips are by foot, bike and/or rapid transit].

The 'best' is the enemy of 'good enough'. Copper shot, not Silver bullets.

LeftieBiker
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Re: Anyone into electric cycling? Electric Bicycles

Sat Oct 26, 2019 6:58 pm

They had better add an exception to allow throttles for those with handicapped placards or plates, because pedelec alone doesn't work if you don't have much leg strength to start the bike moving...
Scarlet Ember 2018 Leaf SL W/ Pro Pilot
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GRA
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Re: Anyone into electric cycling? Electric Bicycles

Sun Oct 27, 2019 3:57 pm

You should contact them and let them know. They're obviously trying to avoid people riding mopeds or e-bikes that are essentially scooters, and much too fast to mix with bikes/roller bladers/pedestrians. Maybe they could offer some kind of handicapped permit, assuming the bike met whatever restricted speed limit they're planning to use? If they do, they'd have to do a much better job of making sure people really do need it than California has done with handicapped placards, which are seemingly given out for anything from hangnails on up, and which are widely abused by able people who are too lazy to walk a few extra steps for parking. https://www.latimes.com/local/lanow/la- ... story.html
Guy [I have lots of experience designing/selling off-grid AE systems, some using EVs but don't own one. Local trips are by foot, bike and/or rapid transit].

The 'best' is the enemy of 'good enough'. Copper shot, not Silver bullets.

LeftieBiker
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Re: Anyone into electric cycling? Electric Bicycles

Sun Oct 27, 2019 4:36 pm

Combining a 500 watt power limit with allowed pedelec (aka PAS) + throttle mode would suffice, as the DBs prefer 1000 watt bikes and higher to satisfy their need for speed. A good torque-sensing PAS system can eliminate the need for a throttle, but bikes with those are damned expensive - multiple thousands of dollars. The best compromise would be a system that cuts off throttle assist above, say, 10MPH, but that would require new controller designs. Current state and federal regs usually limit throttle assisted speed to 20MPH, and that doesn't seem to be a bad standard to adopt, especially when you consider that bicycle speed displays are usually very optimistic.
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Re: Anyone into electric cycling? Electric Bicycles

Sun Oct 27, 2019 4:48 pm

When I test rode a few pedelecs a few years back on National Hydrogen day (10.08), most of them were limited to around 20 mph, but one was able to hit 29, and I thought it accelerated much too fast from a stop when at the highest power setting - it felt like the bike was running out from under you. I think I described them all up-topic. Edit: Found it: https://mynissanleaf.com/viewtopic.php? ... ec#p472116
Guy [I have lots of experience designing/selling off-grid AE systems, some using EVs but don't own one. Local trips are by foot, bike and/or rapid transit].

The 'best' is the enemy of 'good enough'. Copper shot, not Silver bullets.

LeftieBiker
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Re: Anyone into electric cycling? Electric Bicycles

Sun Oct 27, 2019 5:19 pm

You don't usually select a high assist level when starting off: you select a lower one, then do most of the acceleration after you are moving.
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Re: Anyone into electric cycling? Electric Bicycles

Mon Oct 28, 2019 5:44 pm

LeftieBiker wrote:
Sun Oct 27, 2019 5:19 pm
You don't usually select a high assist level when starting off: you select a lower one, then do most of the acceleration after you are moving.

You may not, the question is what the kids who like to ride wheelies the wrong way down major thoroughfares or on sidewalks will do. :? While i'd like to think that no parent would spend that much on a teen's bike, seeing as how we've had teens being given (and crashing) Teslas, I'm not convinced that becoming a parent automatically endows anyone with common sense. Then there are the twenty-somethings who either are or wish they were bike messengers in NYC, or just choose to ride like idjits: https://vimeo.com/24572222

You'd think that Darwinian selection would eliminate most of these people in short order, but we must be making new ones faster than we're eliminating the old ones.
Guy [I have lots of experience designing/selling off-grid AE systems, some using EVs but don't own one. Local trips are by foot, bike and/or rapid transit].

The 'best' is the enemy of 'good enough'. Copper shot, not Silver bullets.

LeftieBiker
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Re: Anyone into electric cycling? Electric Bicycles

Mon Oct 28, 2019 6:28 pm

So you want an eBike that is kid-proof? Good luck. I suppose it goes along with your desire to only drive an EV that was custom made to your specifications. If it's any consolation, hub motors will never be doing wheelies in that price range, as they don't have enough starting torque.
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