Timeline for Constant / maximum set load bike? Does it exist?
Current License: CC BY-SA 3.0
10 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Apr 11, 2016 at 5:47 | comment | added | Chris H | E-bikes are quite restricted here in Europe (power, max speed with assistance) but I hadn't heard of anywhere they're banned. | |
| Apr 11, 2016 at 1:29 | comment | added | David | Electric assisted bikes are illegal in some states but a bike that can be programmed for max load with electric shifting wouldn't be. Shifting gears manually is fun but it would also be fun to design some high tech bike that can load sense and do other advanced things. | |
| Apr 10, 2016 at 16:49 | comment | added | jqning | @David when you say they should, who are you talking about? | |
| Apr 10, 2016 at 12:39 | comment | added | Chris H | Torque wrenches are just a clutch, a spring and a bolt. The slipping is inherent so there isn't really any torque sensing. It's irrelevant. Mechanical torque sending on a bike would be heavy, expensive or possibly both - it must be reliably safe. For the vast majority of riders your idea would be much worse than manual gear shifting which is easy, and cost a small fortune. Your only market is people with money to burn on bikes, who don't care about weight or technique related to shifting. As Carel said, they can just buy an electric bike, which due to economies of scale would be cheaper. | |
| Apr 10, 2016 at 11:39 | comment | added | David | People, they have torque wrenches that are not astronomically priced, so they should be able to have some torque sensing device on a bike which is "tied in" with a bike computer. It would be nice if the mechanical autoshifters also had an electronic mode so the rider could either select cadence based shifting or load based shifting or maybe a mode with both such that limits are set for both. Kinda like in a laboratory power supply where you have both current and voltage limiting, both of which can be set by the operator. Seems bike technology is lagging to me. | |
| Apr 10, 2016 at 11:25 | comment | added | Chris H | The last thing I would want if the headwind gusted stronger would be for my gears to start messing around just as I have to put more effort in. Hills can be anticipated. You probably need to learn to be comfortable at a wide range of cadence (probably at the top end) | |
| Apr 10, 2016 at 11:20 | comment | added | David | One thing I notice when I ride my 21 speed bike even here in very flat central Florida is even a slight change in load is noticeable and makes me want to shift and sometimes I bounce between gears multiple times. It would be nice if I could somehow program my bike to the load I prefer to pedal at and somehow it would not exceed that load (unless it runs out of gears). So then as I am pedaling along, it would adjust so that even if I go up hills, encounter headwinds..., the pedaling effort will never exceed the limit I set. Manual shifting does this by feel. Electronically would be nice. | |
| Apr 10, 2016 at 11:17 | comment | added | Chris H | @Carel on any I've seen it's not regulated by power but by either (i) the action of pedalling with a switch attached to the cranks, or (ii) cadence/drive speed. Neither can tell how hard you're working. Also an electric assist motor takes a lot of battery compared to a sense/select system. Overall you're right though. Our first e-bike was bought from a lifelong cyclist who could no longer ride a normal bike. | |
| Apr 10, 2016 at 9:34 | comment | added | Carel | It would be simpler to have an electric-drive assisted bike, also called pedelec. The amount of power supplied by the electric drive is regulated by pedal power. | |
| Apr 10, 2016 at 8:19 | history | answered | Chris H | CC BY-SA 3.0 |