Search found 8536 matches

by Chalo
Oct 26 2021 11:55pm
Forum: Bike Mechanical & Structural
Topic: Ruined $150 Shimano Deore hydraulic brakes
Replies: 66
Views: 871

Re: Ruined $150 Shimano Deore hydraulic brakes

It has been nearly 40 years since I did tool and die design but best I recall good tool steel does not bend ... even a wee bit. It doesn't yield (until it fractures), but it flexes just as much as regular structural steel. Also, the hub axle isn't made from really good tool steel. There's not any b...
by Chalo
Oct 26 2021 12:11pm
Forum: Bike Mechanical & Structural
Topic: Ruined $150 Shimano Deore hydraulic brakes
Replies: 66
Views: 871

Re: Ruined $150 Shimano Deore hydraulic brakes

1) You have to use a torque arm. Those flatted axles plus nuts in the dropout can work OK for one direction of torque, but the constant back and forth tends to loosen nuts quickly. It does that even with a torque arm, unless it's the clamping kind. Any flatted-hole torque arm you can put on the axl...
by Chalo
Oct 26 2021 12:03pm
Forum: Bike Mechanical & Structural
Topic: Ruined $150 Shimano Deore hydraulic brakes
Replies: 66
Views: 871

Re: Ruined $150 Shimano Deore hydraulic brakes

It's a direct drive hub motor, no gears, no Regen brakes. A direct drive hub motor is capable of regen. 90% of controllers out there are capable of regen; if you have one of those 10% you might have to upgrade to get it. I don't think I've ever worked with a non-programmable controller that had on-...
by Chalo
Oct 26 2021 11:33am
Forum: EBike General Discussion
Topic: Another broken aluminum frame - Surface 604 Elements
Replies: 23
Views: 338

Re: Another broken aluminum frame - Surface 604 Elements

Chalo.... C'mon man. 7000 series is made to be stronger than 6000 series.. 7005-T6 yield strength is 42 ksi. 6061-T6 yield strength is 40 ksi. In my book that definitely qualifies as "about the same". Because manufacturers use 7005 to skip the solution heat treatment step, the heat condit...
by Chalo
Oct 26 2021 3:17am
Forum: EBike General Discussion
Topic: Another broken aluminum frame - Surface 604 Elements
Replies: 23
Views: 338

Re: Another broken aluminum frame - Surface 604 Elements

Yeah I have a 7005 Aluminum bike. I think its stronger or something. Nope, it's about the same strength as 6061 aluminum. The advantage it has, is that it solution heat treats at air cooling rates after welding (in bicycle-ish cross sections). It still benefits from artificial aging, but it saves a...
by Chalo
Oct 26 2021 3:06am
Forum: EBike General Discussion
Topic: Dremel tips
Replies: 20
Views: 294

Re: Dremel tips

There's no getting around the fact that a Dremel tool doesn't have the power or the rigidity to subtract very much steel in a timely fashion. I bought one to behead the security screws that held my window bars on. Had to replace it with another one to finish that small job, which turned out to be to...
by Chalo
Oct 25 2021 3:36pm
Forum: EBike General Discussion
Topic: Moped gangs with machetes target London's cyclists
Replies: 25
Views: 504

Re: Moped gangs with machetes target London's cyclists

RoFo, aka Rob Ford, (my original nemesis BTW) died of liposarcoma which is ironically cancer of the fat tissues. He was the crack smoking mayor, right? https://i.ytimg.com/vi/WjdTi1r-yRQ/mqdefault.jpg I'll try to bring this back around. Intransigently pro-car, anti-all other transportation politici...
by Chalo
Oct 25 2021 1:11pm
Forum: EBike General Discussion
Topic: Breaking in a high powered motor/insulating
Replies: 57
Views: 1068

Re: Breaking in a high powered motor/insulating

Chalo needs to try a downhill bike and realize just how insanely stable and manoeuvrable they are. I don't need to try a bike optimized inflexibly for a squirrel sized man. If I ride with the suspension bottomed out, I won't be able to figure out what you're talking about. On the other hand, any of...
by Chalo
Oct 24 2021 10:44pm
Forum: Bike Mechanical & Structural
Topic: Spacer for freewheel on 9c motor
Replies: 3
Views: 95

Re: Spacer for freewheel on 9c motor

cloudy wrote:
Oct 24 2021 3:00pm
Thanks for that, I wasn't aware BB spacers would work and be the correct size.
They're not just the same size spacer. They're exactly the same thread-- 1.37" x 24tpi. You could screw your hub into your bottom bracket shell (on the left side of the frame, anyway).
by Chalo
Oct 24 2021 9:18pm
Forum: EBike General Discussion
Topic: Another broken aluminum frame - Surface 604 Elements
Replies: 23
Views: 338

Re: Another broken aluminum frame - Surface 604 Elements

The right chainstay carries not only riding loads, but hundreds of pounds of chain tension. It doesn't make structural sense to put those loads on a wishbone stay-- let alone a lopsided one like that, with a huge reduction in section partway along.
by Chalo
Oct 24 2021 8:06pm
Forum: Bike Mechanical & Structural
Topic: Ruined $150 Shimano Deore hydraulic brakes
Replies: 66
Views: 871

Re: Ruined $150 Shimano Deore hydraulic brakes

nicobie wrote:
Oct 24 2021 7:46pm
Seeing as how this is an ebike forum I'd think that using regen braking is a given.
No. Unless you have a low torque motor, that's a great way to wreck your hub motor's axle and your bike's frame. I'll pass.
by Chalo
Oct 24 2021 8:02pm
Forum: EBike General Discussion
Topic: Moped gangs with machetes target London's cyclists
Replies: 25
Views: 504

Re: Moped gangs with machetes target London's cyclists

Time to get your sneaky little GPS trackers installed! I wonder whether anybody builds one into a blinky taillight? You're clearly not in the USA. They'd say never bike without a concealed carry weapon. No bike is worth your life, just say Hey dudes, here yah go. I don't even live in a place as civ...
by Chalo
Oct 24 2021 7:07pm
Forum: EBike General Discussion
Topic: Another broken aluminum frame - Surface 604 Elements
Replies: 23
Views: 338

Re: Another broken aluminum frame - Surface 604 Elements

It's almost like traditional frames with straight chainstays were worked out for a long time and became traditional because other variations weren't as good. Or something.
by Chalo
Oct 24 2021 4:26am
Forum: EBike Non-hub Motor Drives
Topic: Do friction drive motors significantly reduce tire life compared to other methods?
Replies: 2
Views: 90

Re: Do friction drive motors significantly reduce tire life compared to other methods?

SaladFish wrote:
Oct 24 2021 4:15am
Do friction drive motors significantly reduce tire life compared to other methods?
Duh.

And they reduce drive efficiency by as much as half. Tires are tough. It takes a lot of energy to grind them to dust.
by Chalo
Oct 24 2021 1:19am
Forum: EBike General Discussion
Topic: Breaking in a high powered motor/insulating
Replies: 57
Views: 1068

Re: Breaking in a high powered motor/insulating

Chalo needs to try a downhill bike and realize just how insanely stable and manoeuvrable they are. I don't need to try a bike optimized inflexibly for a squirrel sized man. If I ride with the suspension bottomed out, I won't be able to figure out what you're talking about. On the other hand, any of...
by Chalo
Oct 23 2021 5:37pm
Forum: EBike General Discussion
Topic: Moped gangs with machetes target London's cyclists
Replies: 25
Views: 504

Re: Moped gangs with machetes target London's cyclists

Time to get your sneaky little GPS trackers installed! I wonder whether anybody builds one into a blinky taillight?
by Chalo
Oct 23 2021 4:30pm
Forum: EBike General Discussion
Topic: How to secure the battery to the bike
Replies: 16
Views: 373

Re: How to secure the battery to the bike

KIMG0456.jpg It's hard to tell from the pic, but that battery rack is a razor scooter body with the steering removed, sitting on the top tube with padding in between, with the seatpost stabilizing it. There's not even any fasteners. Haha I love it! It reminds me of the umm, expedient battery mounti...
by Chalo
Oct 23 2021 12:49pm
Forum: EBike Non-hub Motor Drives
Topic: TSDZ2 Error 0x2 0x80060b2
Replies: 4
Views: 122

Re: TSDZ2 Error 0x2 0x80060b2

I'm so impressed with TSDZ2 and the people who pay their own money for the opportunity to do product testing and development for Tongsheng.

How cool it would be to have customers like that.
by Chalo
Oct 23 2021 12:45pm
Forum: EBike General Discussion
Topic: Shimano Hollowtech II External Bottom Brackets
Replies: 4
Views: 102

Re: Shimano Hollowtech II External Bottom Brackets

mxlemming wrote:
Oct 23 2021 11:55am
There's nothing else inside the bb. Just those 2 cups and the axle.
There's a little plastic sleeve between the cups that serves as a crap shield.
by Chalo
Oct 23 2021 12:22pm
Forum: EBike General Discussion
Topic: Converting fleet of citibike style share bikes- front hub vs bbs01
Replies: 10
Views: 205

Re: Converting fleet of citibike style share bikes- front hub vs bbs01

The jump hubs are probably going to be the winner here, As we know they are capable of plenty of abuse and cheap enough to grab some extras for parts. You'll need extras because also because the wheels arrive in "as is" condition. Bent rotors are the norm, along with cosmetic damage from ...
by Chalo
Oct 23 2021 11:07am
Forum: Bike Mechanical & Structural
Topic: Ruined $150 Shimano Deore hydraulic brakes
Replies: 66
Views: 871

Re: Ruined $150 Shimano Deore hydraulic brakes

Your love of rim brakes and cable pull discs is your business, but be realistic when you seem to suggest that they are all that is needed for ideal effectiveness for all ebike applications. I've been riding bikes as a primary means of transportation since 1987. I worked as a shop cycle mechanic fir...
by Chalo
Oct 23 2021 3:57am
Forum: Motor Technology
Topic: Hub Motor Idea
Replies: 35
Views: 490

Re: Hub Motor Idea

You should let the guys over in the 3D printing thread try to convince you that your widget can be 3D printed from plastic in wasp-like fashion. I mean, technically they'd be right, as long as you didn't try to run it.
by Chalo
Oct 23 2021 3:49am
Forum: Motor Technology
Topic: Confusion about which controller to buy for Voilamart 1000w hub motor
Replies: 13
Views: 525

Re: Confusion about which controller to buy for Voilamart 1000w hub motor

I have a voila too. I'm going to try flipping out the generic too. Should be able to handle an Ali controller. Any. Cross fingers. Plan to replace the plugs as necessary and work out the phase and Hall wire assignments yourself. After those things are taken care of, there's not much else to it unle...
by Chalo
Oct 23 2021 3:42am
Forum: EBike General Discussion
Topic: Breaking in a high powered motor/insulating
Replies: 57
Views: 1068

Re: Breaking in a high powered motor/insulating

qaivid wrote:
Oct 23 2021 3:36am
Huge difference between my DH racing bike and the girlie step through of my neighbor. Bikes are made for the purpose that they serve.
Or in the case of old DH racing bikes converted into e-bikes and ridden on the street, not made for the purpose they serve.
by Chalo
Oct 23 2021 3:39am
Forum: EBike General Discussion
Topic: Converting fleet of citibike style share bikes- front hub vs bbs01
Replies: 10
Views: 205

Re: Converting fleet of citibike style share bikes- front hub vs bbs01

I think their gear must have been pretty rip-off-proof, I suppose the battery unit that you could get to fairly easily wasn't standard enough that you could open it up, discard the transmitter and use the battery for your own purposes. Not only do you need special tools to work the security fastene...