Search found 1976 matches

by LewTwo
Sep 24 2022 1:30am
Forum: EBike Troubleshooting
Topic: Truing this Disc rotor is trying my patience
Replies: 70
Views: 797

Re: Truing this Disc rotor is trying my patience

ebuilder wrote:
Sep 23 2022 5:55am
Nope. What the mechanic missed is a fundament of good rear derailleur shifting. ....
Actually, unless the pavements in his part of the world are much better maintained than those around here, his major mistake was building a "road bike".
by LewTwo
Sep 22 2022 8:01pm
Forum: EBike Troubleshooting
Topic: Truing this Disc rotor is trying my patience
Replies: 70
Views: 797

Re: Truing this Disc rotor is trying my patience

ebuilder wrote:
Sep 22 2022 6:47pm
Pop quiz. What did this bike builder do wrong with this build?
https://www.youtube.com/watch?v=aB3-z5S9MXg
1) Made a video
2) Spent too much yen
3) Used silicon caulk on the bearings
by LewTwo
Sep 22 2022 6:15pm
Forum: EBike General Discussion
Topic: found cracks in rear hub motor side cover
Replies: 24
Views: 521

Re: found cracks in rear hub motor side cover

Ianhill wrote:
Sep 21 2022 6:01pm
Ultimate answer would be fake a broken bone and ask the local a+e to xray the piece.
Dye penetrate inspection is likely more practical.
by LewTwo
Sep 22 2022 6:05pm
Forum: EBike Troubleshooting
Topic: Truing this Disc rotor is trying my patience
Replies: 70
Views: 797

Re: Truing this Disc rotor is trying my patience

People here like DYI. The vast biking and ebike community is not DYI. They couldn't adjust a derailleur if their life depended on it. I know strong bike racers who can't turn a wrench. I refer a lot of people to the local bike shop and they do pretty good work as well. I grew up in different times,...
by LewTwo
Sep 22 2022 4:21pm
Forum: EBike Technical
Topic: Ebike lighting
Replies: 34
Views: 634

Re: Ebike lighting

slaphappygamer wrote:
Sep 21 2022 9:51pm
I hated the control switch that came with the kit. I would leave the turn signals on.
I used to have that problem on a ICE scooter. An EE at work came up with a circuit based on a 555 timer that cut them off after 60 seconds (no I do not have the schematic as that was decades ago).
by LewTwo
Sep 22 2022 4:07pm
Forum: EBike Troubleshooting
Topic: Truing this Disc rotor is trying my patience
Replies: 70
Views: 797

Re: Truing this Disc rotor is trying my patience

ebuilder wrote:
Sep 22 2022 12:11pm
Most people can't adjust rim brakes let along caliper disc brakes.
An argument could be made that those people should stick with bicycles that have coaster brakes.
by LewTwo
Sep 21 2022 3:55pm
Forum: EBike Build Threads
Topic: Battery Pack, 48 Volt 20 Ah LiFePO4 cells
Replies: 1
Views: 97

Battery Pack, 48 Volt 20 Ah LiFePO4 cells

I really do not want to build a battery pack but the Shark battery pack I was going to use on my current Giant Revive E-Bike Build is “ Tango-Uniform ” ( you children that do not know what that means should ask your grandfather ). I might be able to fix it but it is likely too close to end of life t...
by LewTwo
Sep 21 2022 2:03am
Forum: EBike General Discussion
Topic: Rear Gear Generator
Replies: 4
Views: 204

Re: Rear Gear Generator

One option is that if you have a long chainline, split it somewhere in the middle with an IGH with a suitable gear range for pedalling in your usage scenario. The pedals feed the input sprocket, and an output sprocket gets mounted to the spoke flange on the right side, just inboard of the input spr...
by LewTwo
Sep 20 2022 10:31pm
Forum: EBike General Discussion
Topic: Lighter weight Battery Pack suitable for Tongsheng TSDZ2B 48 Volt 750 watt
Replies: 14
Views: 295

Re: Lighter weight Battery Pack suitable for Tongsheng TSDZ2B 48 Volt 750 watt

Listening to all the replies, I think it is not worth reducing the capacity of the battery, in order to save at maximum 1 Kg. Likely a wise decision. Not to beat a dead horse but I have one last comment .... I tried to find a reference to these earlier but they have disappeared from listing in Grin...
by LewTwo
Sep 20 2022 2:42pm
Forum: EBike Build Threads
Topic: Electrifying my Dahon Mu Uno
Replies: 52
Views: 2155

Re: Electrifying my Dahon Mu Uno

tonythebrit wrote:
Sep 20 2022 11:40am
... but the Swytch front wheel motor is a relatively pipsqueak 250W, should I still play safe and fit a Torque Arm (or arms)? ...
ABSOLUTELY !
An once of prevention always beats a week in hospital.
by LewTwo
Sep 20 2022 2:08pm
Forum: EBike General Discussion
Topic: Lighter weight Battery Pack suitable for Tongsheng TSDZ2B 48 Volt 750 watt
Replies: 14
Views: 295

Re: Lighter weight Battery Pack suitable for Tongsheng TSDZ2B 48 Volt 750 watt

Does that mean that there might be a 'rule of thumb' of what would be the lowest ah capacity that would be useful for a 48 volt 750 watt motor? More like a rule of " market demand ". Too little market demand to make it profitable. There are a few e-Bikes with small capacity batteries but ...
by LewTwo
Sep 20 2022 1:27pm
Forum: EBike General Discussion
Topic: Rear Gear Generator
Replies: 4
Views: 204

Re: Rear Gear Generator

Image
https://www.youtube.com/watch?v=SPnM08Z ... Review.com

Might want to try a larger front sprocket before you get into a exotic solution.
by LewTwo
Sep 20 2022 1:08pm
Forum: EBike General Discussion
Topic: Power Inverter for Electric Bike Battery
Replies: 4
Views: 185

Re: Power Inverter for Electric Bike Battery

Good find. I did a bunch of research online about a year ago and couldn't find anything like this. I ended up using my old 12V buck converter for charging phones, etc., off my old 14S pack. I wonder if that unit would work with 14S? Not that good ... those are Chinese AC plugs. The 600 watt one wil...
by LewTwo
Sep 20 2022 12:43am
Forum: EBike Troubleshooting
Topic: Truing this Disc rotor is trying my patience
Replies: 70
Views: 797

Re: Truing this Disc rotor is trying my patience

They are referred to as a convex washer and a concave washer. One pair of these is between the caliper body and where it connects to the frame bracket or post 'per bolt'. Think of it as a sandwich . You can see the " sandwich " in this picture from my Giant Revive build thread: https://en...
by LewTwo
Sep 20 2022 12:19am
Forum: EBike General Discussion
Topic: Lighter weight Battery Pack suitable for Tongsheng TSDZ2B 48 Volt 750 watt
Replies: 14
Views: 295

Re: Lighter weight Battery Pack suitable for Tongsheng TSDZ2B 48 Volt 750 watt

When you buy a generic downtube battery you are pretty much going to get the same thing from any Chinese vendor. They will all use the same case and the same number of cells. The only significant difference is going to be the cells they fill them with. Those can be anything from no-name generic to n...
by LewTwo
Sep 19 2022 11:57pm
Forum: EBike General Discussion
Topic: Power Inverter for Electric Bike Battery
Replies: 4
Views: 185

Power Inverter for Electric Bike Battery

I have a couple of old sine wave 12 Volt DC to 120 Volt AC inverters. I used to have then installed in my vehicle to occasionally run a power tool. Maybe I live a sheltered life but this is the first time I can recall seeing a 120 AC Volt inverter specifically advertised for an E-Bike. https://www.a...
by LewTwo
Sep 19 2022 11:38pm
Forum: EBike Build Threads
Topic: My armchair engineering ebike
Replies: 49
Views: 1499

Re: My armchair engineering ebike

The Madmadscientist wrote:
Jul 25 2022 7:37pm
My plan is to build up an ebike that is personalized to my tastes ...
Yo, Daniel .... have you seen this? Looks a bit like they had you in mind.
https://www.amazon.com/dp/B08Y1VVW7Z
by LewTwo
Sep 19 2022 11:32pm
Forum: EBike Non-hub Motor Drives
Topic: BBS02 motor whine
Replies: 28
Views: 538

Re: BBS02 motor whine

Hey LewTwo, for the record, if you were to drill the 2 holes where shown in your photo, you'd drill into the shaft that turns the main motor hear. :D No bueno. The blind bearing lives under the cover area I circled. OK ... but the point is the same: " there is more than one way to skin a rabid...
by LewTwo
Sep 19 2022 10:10pm
Forum: EBike General Discussion
Topic: what multimetre should i choose for present cell mesurement and future home task
Replies: 31
Views: 549

Re: what multimetre should i choose for present cell mesurement and future home task

Not sure what people are considering "#3" - but the third one on the list I see is the "AstroAI" for ~$18. It says and looks like it does AC and DC voltage to me, plus 'the usual' other functions... resistance, conductivity, etc. For general use, I suspect it would be more than ...
by LewTwo
Sep 19 2022 12:53am
Forum: EBike General Discussion
Topic: what multimetre should i choose for present cell mesurement and future home task
Replies: 31
Views: 549

Re: what multimetre should i choose for present cell mesurement and future home task

The last one will not measure AC voltage (i.e. what you have in your home).
The second has fuses for both Amp and Miliamps.
It is also likely accurate enough for a beginner.
by LewTwo
Sep 18 2022 11:00pm
Forum: EBike General Discussion
Topic: My custom frame full suspension long tail dual hub cargo bike
Replies: 29
Views: 650

Re: My custom frame full suspension long tail dual hub cargo bike

[ah interesting will that give you the force acting on the piston somehow? I didn't know that. do you know of a shock that'll take 400lbs? Mostly they seem designed for a 200lb rider + bike so around 250lbs or so. This number isn't published so hard to nail it down. Oakland, CA ... there are some f...
by LewTwo
Sep 18 2022 7:13pm
Forum: EBike General Discussion
Topic: My custom frame full suspension long tail dual hub cargo bike
Replies: 29
Views: 650

Re: My custom frame full suspension long tail dual hub cargo bike

frk1206 wrote:
Sep 18 2022 5:21pm
Most air shocks I’ve seen top out at 250-300 lbs.
That is PSI .... now multiply that by the area of the piston.
by LewTwo
Sep 18 2022 3:38pm
Forum: EBike Technical
Topic: Bafang BBS02B Speedometer Sensor
Replies: 8
Views: 157

Re: Bafang BBS02B Speedometer Sensor

Actually this appears to be a "latching" hall. I went back and tested it three times to verify that ... because I did not believe it the first time. I had to purchase a new sensor via Amazon to use on the bike. I was pleasantly surprised to see that it actually appears to be a Bafang OEM p...
by LewTwo
Sep 18 2022 3:01pm
Forum: EBike General Discussion
Topic: My custom frame full suspension long tail dual hub cargo bike
Replies: 29
Views: 650

Re: My custom frame full suspension long tail dual hub cargo bike

The advantage of a single shock swing arm is cost ( one vs two ). Spring shocks are cheaper and with limited options for preload. The springs also inevitably rust regardless of the paint, coating, plating or other surface treatment used. A single high quality air-shock will likely be more expensive ...
by LewTwo
Sep 17 2022 12:20pm
Forum: EBike Non-hub Motor Drives
Topic: 860c OSF programming help
Replies: 6
Views: 173

Re: 860c OSF programming help

https://cycles.eco/blogs/eco-cycles-ins ... e-tutorial

"850C Displays are no longer recommended as changes in hardware often cause failure of OSF loading and 'brick' the display."