3 psi tire at 60 mph sounds like a recipe for overheating and delamination.
Search found 7569 matches
- Mar 08 2021 1:16am
- Forum: EBike General Discussion
- Topic: Please help me critique my dream ebike.
- Replies: 28
- Views: 687
- Mar 08 2021 1:13am
- Forum: EBike General Discussion
- Topic: 1 1/8" forks on 1" frame???? :S
- Replies: 6
- Views: 97
Re: 1 1/8" forks on 1" frame???? :S
No bodge required, adapter just works That seems okay if you make the cups to fit the OD of the specific head tube, and if your head tube is relatively short and the steer tube made from steel. The clearance between a 28.6mm steer tube and a 1" head tube that is reamed to 30.0mm or 30.2mm on t...
- Mar 08 2021 12:31am
- Forum: E-Scooter and Motorcycle Build Threads
- Topic: Electric Roadster
- Replies: 109
- Views: 5472
Re: Electric Roadster
As long as you use the "alternate" right turn signal and not the original one, you will keep your arms. I've been using them since about 1976, on motorcycles first and now bicycles. The original version of the right turn was worthless anyway: 9 out of 10 people think you are waving at the...
- Mar 07 2021 5:26pm
- Forum: EBike General Discussion
- Topic: 1 1/8" forks on 1" frame???? :S
- Replies: 6
- Views: 97
Re: 1 1/8" forks on 1" frame???? :S
By the time you get finished bodging something together that makes another problem for you later, you'll have spent more time, effort, and resources on doing the job poorly than you would have acquiring a more suitable frame. I once retrofitted a 1" frame MTB with a super heavy duty 1" for...
- Mar 07 2021 1:03pm
- Forum: E-Vehicles General Discussion
- Topic: The Onecycle build. My self balancing single wheeled e-bike(?)
- Replies: 6
- Views: 356
Re: The Onecycle build. My self balancing single wheeled e-bike(?)
If you want to throw lots of money at it, there are 30" rims and radial tires for custom motorcycles.


- Mar 07 2021 9:41am
- Forum: EBike Non-hub Motor Drives
- Topic: Friction *regen brake* sanity check
- Replies: 31
- Views: 559
Re: Friction *regen brake* sanity check
Expect around half that efficiency if you use a friction roller. The more braking power you can apply, the more of it you'll lose to friction and hysteresis.
- Mar 06 2021 8:36pm
- Forum: EBike Troubleshooting
- Topic: Throttle wired wrong?
- Replies: 4
- Views: 86
Re: Throttle wired wrong?
If I had a bike with that problem, I'd replace the plug or rearrange the terminals in it, so that it would work correctly with whatever throttles I want to use. Don't get hung up on the color code if it's incorrect. One of the wires is +5V from the controller, one is GND, and the third one is for th...
- Mar 06 2021 12:04pm
- Forum: E-Scooter and Motorcycle Build Threads
- Topic: Electric Roadster
- Replies: 109
- Views: 5472
Re: Electric Roadster
I have about 35 years in city traffic, in cities that rank among the top 20 US cities by population. Those are the only signals I've had for most of that time. But I do enjoy hearing uninformed opinions from folks who are too chicken-hearted to actually try it and see. ...and I do enjoy hearing fro...
- Mar 06 2021 12:02pm
- Forum: E-Scooter and Motorcycle Build Threads
- Topic: Electric Roadster
- Replies: 109
- Views: 5472
Re: Electric Roadster
As long as you use the "alternate" right turn signal and not the original one, you will keep your arms. I've been using them since about 1976, on motorcycles first and now bicycles. The original version of the right turn was worthless anyway: 9 out of 10 people think you are waving at the...
- Mar 05 2021 7:55pm
- Forum: E-Scooter and Motorcycle Build Threads
- Topic: Electric Roadster
- Replies: 109
- Views: 5472
Re: Electric Roadster
Don't you think it's quite dangerous driving in city traffic without turn signals? https://bloximages.newyork1.vip.townnews.com/ocolly.com/content/tncms/assets/v3/editorial/e/01/e014a01a-853c-11e2-af13-001a4bcf6878/513559518179f.image.jpg LOL If you would use theses signals around here where I live...
- Mar 05 2021 7:44pm
- Forum: E-Scooter and Motorcycle Build Threads
- Topic: Electric Roadster
- Replies: 109
- Views: 5472
Re: Electric Roadster
Elektrosherpa wrote: ↑Mar 05 2021 7:31pmDon't you think it's quite dangerous driving in city traffic without turn signals?

- Mar 03 2021 12:54am
- Forum: EBike Non-hub Motor Drives
- Topic: Friction *regen brake* sanity check
- Replies: 31
- Views: 559
Re: Friction *regen brake* sanity check
The GMAC does drag, due to the locked clutch that allows it to do regen. It definitely drags-- more so than something like a direct drive Leaf motor, in my observation. Maybe a bit of exaggeration by Grin, but they seem convinced it is less than a DD hub. Interesting. Maybe at speed? I can only com...
- Mar 02 2021 1:10pm
- Forum: EBike Non-hub Motor Drives
- Topic: Friction *regen brake* sanity check
- Replies: 31
- Views: 559
Re: Friction *regen brake* sanity check
GMAC hub motor with locked clutch: no drag and does regen. It definitely drags-- more so than something like a direct drive Leaf motor, in my observation. I would count it, along with all direct drive motors, as categorically unsuitable for long distance touring. Gotta have some kind of clutch to d...
- Mar 01 2021 11:12am
- Forum: Motor Technology
- Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
- Replies: 1928
- Views: 250379
Re: Leaf / leafmotor / leafbike high efficiency 1500w motor
I didn't think Chalo would make such an oversight (about the torque at the threads vs the gear ratio/chain tension) :) I could see the cycles of impulse causing metal fatigue. So you're saying each tooth on the sprocket engaging and disengaging with the chain causes pulses in the amount of torque t...
- Mar 01 2021 2:17am
- Forum: Motor Technology
- Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
- Replies: 1928
- Views: 250379
Re: Leaf / leafmotor / leafbike high efficiency 1500w motor
Torque at the freewheel thread would be the same given the same gearing ratio, But it isn't torque that breaks hub motor sidecovers; it's the bending moment of the chain pulling on the freewheel or cassette. Steady torque is a static force, but chain tension cycles around with the wheel's rotation,...
- Mar 01 2021 2:10am
- Forum: EBike General Discussion
- Topic: Please help me critique my dream ebike.
- Replies: 28
- Views: 687
Re: Please help me critique my dream ebike.
Let us know when you break your hub motor's right sidecover. Could you explain to me how this failure occurs? Is it simply from the torque of the mid drive turning over the freewheel during normal operation? or is it from the chain becoming out of alignment and ripping/pulling on the freewheel? Hub...
- Feb 28 2021 8:54pm
- Forum: Motor Technology
- Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
- Replies: 1928
- Views: 250379
Re: Leaf / leafmotor / leafbike high efficiency 1500w motor
I ordered the cassette version because at the time I could not readily find 7 speed freewheels with an 11T small cog, and it appeared as if the only one on the market, the DNP Epoch, was being discontinued DNP freewheels are pretty junky and failure prone. There's another concern when setting up ge...
- Feb 28 2021 8:03pm
- Forum: EBike General Discussion
- Topic: Please help me critique my dream ebike.
- Replies: 28
- Views: 687
Re: Please help me critique my dream ebike.
Cool-- great way to drive away knowledgeable help.s1dewinder wrote: ↑Feb 27 2021 11:55amDual electric rear wheel drive: mid drive+direct drive rear hub (don't try to stop me, this element is non-negotiable)
Let us know when you break your hub motor's right sidecover.
- Feb 26 2021 10:20am
- Forum: E-Vehicles General Discussion
- Topic: Can Tesla converted to diesel?
- Replies: 22
- Views: 514
Re: Can Tesla converted to diesel?
It sounds like you could use portal axles, which will give you gear reduction plus extra ground clearance. Thank you! It is very good idea! A quick search returns with ZF electric portal axle. https://www.youtube.com/watch?v=23-i0niqDP4&ab_channel=ZFGroup 250KW / 22.000 NM! No need that yellow ...
- Feb 24 2021 6:34pm
- Forum: EBike Build Threads
- Topic: Can I and should I do this
- Replies: 12
- Views: 334
Re: Can I and should I do this
with disc mounts if you must have disc brakes (they don't improve anything except your bike's cleanliness). Not to restart that old argument, but it depends on what you are starting with. Take a spin on an EZIP trails with rim brakes, and you will appreciate disks more. I've dealt with cheap and aw...
- Feb 24 2021 5:27pm
- Forum: EBike Build Threads
- Topic: Can I and should I do this
- Replies: 12
- Views: 334
Re: Can I and should I do this
Hi everyone. New here and need your help. I have an older (mid 1990s) Dean Titanium Bicycle that weighs about 12 lbs loaded. No, it doesn't. I’m thinking of making it an e bike. Don't do that. You'll only screw up a nice pedal bike, and not enjoy any of its nicer qualities after your convert it. If...
- Feb 24 2021 5:16pm
- Forum: E-Vehicles General Discussion
- Topic: Can Tesla converted to diesel?
- Replies: 22
- Views: 514
Re: Can Tesla converted to diesel?
I'm planning to built a 4x4 off road vehicle and I would like to feed all 4 DC hub motors with 50 kw diesel with DC generator. [...] but I need a very low rpm engine since tyres are big and vehicle speed will be limited to 40 mph. It sounds like you could use portal axles, which will give you gear ...
- Feb 22 2021 3:14am
- Forum: EBike General Discussion
- Topic: Help with an e-bike for my courier job
- Replies: 20
- Views: 552
Re: Help with an e-bike for my courier job
I want to go 15-20 mph for 10 hours. I'm wanting a 150-200 mile range. As others have said... naw. Instead plan on having multiple packs that you can rotate out, running one while others are charging. This is how festival pedicabbers get the endurance you're looking for. You can probably reduce you...
- Feb 20 2021 2:30am
- Forum: Battery Technology
- Topic: Trying to increase my batteries longevity but did i actually destroy it doing so?
- Replies: 22
- Views: 544
Re: Trying to increase my batteries longevity but did i actually destroy it doing so?
If the pack you have tends to become unbalanced, consider adding one of these: https://www.ebay.com/itm/4S-8S-13S-20S-Lithium-Battery-Active-Equalizer-Protection-Board-Balance-Board/383907966158 This is one example out of many such boards that are available. It will balance the cells whenever an imb...
- Feb 19 2021 2:31am
- Forum: EBike Build Threads
- Topic: New build help. Is this safe?
- Replies: 28
- Views: 914
Re: New build help. Is this safe?
Yeah, I tend to believe cheap BMSs cause about as many dangers and problems as they solve. I get the rationale for pack sellers trying to idiot-proof their product, but I'd rather move the balancing hardware off the bike and run the proven fast-blow ANN fuse for overcurrent protection. This implies...