vnlj
100 µW
I have recently caught onto the idea of converting my Trek DS (8.3 DS, 2015ish, 700c) into an ebike. I have no prior experience with DIY-ebiking but consider myself technical competent and somewhat handy. I have read rigourosly on various ebike sites and concluded that I will be well served with some adviced from you guys here at Endless-sphere.
First and foremost I intend to use the bike as a commuter on a more or less daily basis. The terrain here is pretty varied. I'll be travelling paved and brick-laid road, some gravel. On my commute there are a couple of short steep hills and some low grade ones as well. But I imagine using the bike more once its an electric, so I would like it to be able to handle more ‘heat-challenging’ routes. Keep in mind my knowledge of what type of terrain and usage demand what kind of setup is most limited. I enjoy biking and have no problem doing so without any assistant on my (usually) very short commutes. But I would like to go a bit faster and do so without building up a sweat. I am pretty lightweight (150 pounds), my bike - not so much. It’s not MTB-heavy but not exactly roadster-light. Ebikes are common here and under EU-restrictions. And I live in the city, so the bike should not draw attention. Needless to say, I won’t be swoosh-ing the streets at 40kph. However, I appriciate having the opportunity to go at an enjoyable (that is, high) speed if an affordable and discreet setup allows me to. I don’t intend to spend an awful amount (partly because of sky-high import taxes), but I am willing to stretch it relative to the following setup of which I am temporarily settled on.
- Bafang SWXH: http://www.greenbikekit.com/bafang-swxh-bldc-hub-engines.html
- S06S Torque Simulation Sine Wave Controller (max 15A? Not sure I understand controller-ratings and their implications): https://bmsbattery.com/ebike-kit/546-s06s-250w-torque-simulation-sine-wave-controller-ebike-kit.html
- 48v 12.5 Ah battery, 20A continuous discharge current: https://bmsbattery.com/ebike-battery/817-48v116ah-case-08-bottle-panasonic-battery-pack-battery.html
My reasoning here follows a compromise between weight, stealth, performance and cost.
But on this I have some questions:
1. What kind of speed and climbing abilities would I be likely to get?
2. And what kind of range? (I don’t have major expectations. Decided to save on battery and reckoned the above is adequate in near any circumstance as I’ll be pedaling along)
3. Given that the bike will face the occasional steep hill and long rapid descents, will there be a problem in terms of heat generation?
4. What RPM will best suffice my needs?
5. Could I be better served by another type of battery? Insights on RC lipo-types from HK?
From what I have managed to gather I am fairly certain that my needs with regard to the first two questions will be satisfied through this setup. So emphasis probably falls on the third.
As accessories goes:
- PAS and three-step level switch (number of poles on PAS? Does it matter?)
- Generic China-LCD, whichever the prettiest (least-ugly) (Maybe CA in future. Too expensive atm)
- Ebike brake levers or HBWS, depending on which is most convenient on my bike (Brake wires are coated all the way, so probably ebrakes? Can I keep the existing wiring and just pop them right in the ebrakes?)
- 7-speed freewheel, as I have understood is needed
- Maybe a thumb throttle just for fun (can I have both throttle and PAS with the opportunity to switch between?)
- What else do I need?
Apart from all outlined above, I have slight worries about the bike looking totally frankensteiny. Suggestions with regards to cabeling, placement of controller, etc? Can I drill holes in the frame and run cables through there?
Of course I am open to all kinds of suggestions alternative to the above setup. I am sure you will have tons, and now you know a little bit about my situation. I really hope you can supply me with some fruitful advice. I’m thankful for all!
First and foremost I intend to use the bike as a commuter on a more or less daily basis. The terrain here is pretty varied. I'll be travelling paved and brick-laid road, some gravel. On my commute there are a couple of short steep hills and some low grade ones as well. But I imagine using the bike more once its an electric, so I would like it to be able to handle more ‘heat-challenging’ routes. Keep in mind my knowledge of what type of terrain and usage demand what kind of setup is most limited. I enjoy biking and have no problem doing so without any assistant on my (usually) very short commutes. But I would like to go a bit faster and do so without building up a sweat. I am pretty lightweight (150 pounds), my bike - not so much. It’s not MTB-heavy but not exactly roadster-light. Ebikes are common here and under EU-restrictions. And I live in the city, so the bike should not draw attention. Needless to say, I won’t be swoosh-ing the streets at 40kph. However, I appriciate having the opportunity to go at an enjoyable (that is, high) speed if an affordable and discreet setup allows me to. I don’t intend to spend an awful amount (partly because of sky-high import taxes), but I am willing to stretch it relative to the following setup of which I am temporarily settled on.
- Bafang SWXH: http://www.greenbikekit.com/bafang-swxh-bldc-hub-engines.html
- S06S Torque Simulation Sine Wave Controller (max 15A? Not sure I understand controller-ratings and their implications): https://bmsbattery.com/ebike-kit/546-s06s-250w-torque-simulation-sine-wave-controller-ebike-kit.html
- 48v 12.5 Ah battery, 20A continuous discharge current: https://bmsbattery.com/ebike-battery/817-48v116ah-case-08-bottle-panasonic-battery-pack-battery.html
My reasoning here follows a compromise between weight, stealth, performance and cost.
But on this I have some questions:
1. What kind of speed and climbing abilities would I be likely to get?
2. And what kind of range? (I don’t have major expectations. Decided to save on battery and reckoned the above is adequate in near any circumstance as I’ll be pedaling along)
3. Given that the bike will face the occasional steep hill and long rapid descents, will there be a problem in terms of heat generation?
4. What RPM will best suffice my needs?
5. Could I be better served by another type of battery? Insights on RC lipo-types from HK?
From what I have managed to gather I am fairly certain that my needs with regard to the first two questions will be satisfied through this setup. So emphasis probably falls on the third.
As accessories goes:
- PAS and three-step level switch (number of poles on PAS? Does it matter?)
- Generic China-LCD, whichever the prettiest (least-ugly) (Maybe CA in future. Too expensive atm)
- Ebike brake levers or HBWS, depending on which is most convenient on my bike (Brake wires are coated all the way, so probably ebrakes? Can I keep the existing wiring and just pop them right in the ebrakes?)
- 7-speed freewheel, as I have understood is needed
- Maybe a thumb throttle just for fun (can I have both throttle and PAS with the opportunity to switch between?)
- What else do I need?
Apart from all outlined above, I have slight worries about the bike looking totally frankensteiny. Suggestions with regards to cabeling, placement of controller, etc? Can I drill holes in the frame and run cables through there?
Of course I am open to all kinds of suggestions alternative to the above setup. I am sure you will have tons, and now you know a little bit about my situation. I really hope you can supply me with some fruitful advice. I’m thankful for all!