Hello!
I have build two ebikes so far, both using a basic PAS system.
Classic steel frame (no suspension) city bike with hub motor
- Using this to get around town (flat roads, cobblestones, ..)
- Crystalyte H4065 (High Torque motor in 28" wheel) @ 36V - 728Wh battery
- Good/fast acceleration up to its 20MPH top speed (legal for normal ebike over here). It has very poor brakes (Shimano roller brake in front, crappy vintage rim brake on rear). Unfortunately, no mounts or room for disc brakes. The bike is very heavy in the rear and bounces badly on bumpy roads. I used the steel frame for the classic looks, but am disappointed in handling and braking.
High quality aluminium downhill mountainbike with mid motor
- Using this for real off-road mountain biking (very steep hills, loose gravel, big rock gardens, etc.)
- BBSHD with 42T Lekkie chainring @ 52V - 1045Wh battery (in a backpack); DPC18 Display at the moment, just ordered an Eggrider V2
- Top speed 30MPH (legal for a high speed ebike over here). Long travel front & rear suspension, big 203mm hydraulic disc brakes make it a very comfortable and safe bike to ride. Very capable at climbing very steep hills, even on very loose or very rough terrain. Has a very natural balance to it, it's great on trails. I love this bike. Only thing missing is a torque-sensing PAS system
Now I would like to build a new bike for commuting 20 miles to/from work. Needs to be a legal (PAS, 30MPH) ebike. I will most likely use a Qulbix Q76R frame to keep the battery weight in the middle of the bike. Parts will come of a downhill mountainbike (triple front forks, big hydraulic disc brakes, 26" wheels. It needs to keep 30MPH for a while on flat roads without too much pedal effort.
Since I'm so happy with my downhill bike, I'm really considering getting a BBSHD again but with a 46T or 52T chainring to lower the cadence at 30MPH. I won't need all the climbing power, so this seems like a good trade-off. Since this bike is not for serious off-roading, I have no issues with a hub motor either. The QS205 is so popular, I'm doubting if I shouldn't consider this option as well. My biggest issue is that I want/need a PAS eBIKE, not a throttle-moped (although I have no problem with people wanting that). The QS has a single freewheel, so if I gear it for a comfortable cadence at 30MPH, it will be a very low cadence at 10-12mph).
Has anybody done a decent PAS integration with a QS? How naturally does it handle? Perhaps even a Torque sensing PAS system? Any suggestions on a Torque sensing BB that fits the Qulbix 76 Frame? (I believe it has a 83mm BSA BB)
All opinions, suggestions, information, experiences are welcome. But please don't turn this in another MID vs HUB discussion. I have both and aknowledge the advantages of both system. I'm just asking for opinions on which would better suit my current build (commuter bike that handles well with a natural feeling PAS).
thanks
I have build two ebikes so far, both using a basic PAS system.
Classic steel frame (no suspension) city bike with hub motor
- Using this to get around town (flat roads, cobblestones, ..)
- Crystalyte H4065 (High Torque motor in 28" wheel) @ 36V - 728Wh battery
- Good/fast acceleration up to its 20MPH top speed (legal for normal ebike over here). It has very poor brakes (Shimano roller brake in front, crappy vintage rim brake on rear). Unfortunately, no mounts or room for disc brakes. The bike is very heavy in the rear and bounces badly on bumpy roads. I used the steel frame for the classic looks, but am disappointed in handling and braking.
High quality aluminium downhill mountainbike with mid motor
- Using this for real off-road mountain biking (very steep hills, loose gravel, big rock gardens, etc.)
- BBSHD with 42T Lekkie chainring @ 52V - 1045Wh battery (in a backpack); DPC18 Display at the moment, just ordered an Eggrider V2
- Top speed 30MPH (legal for a high speed ebike over here). Long travel front & rear suspension, big 203mm hydraulic disc brakes make it a very comfortable and safe bike to ride. Very capable at climbing very steep hills, even on very loose or very rough terrain. Has a very natural balance to it, it's great on trails. I love this bike. Only thing missing is a torque-sensing PAS system
Now I would like to build a new bike for commuting 20 miles to/from work. Needs to be a legal (PAS, 30MPH) ebike. I will most likely use a Qulbix Q76R frame to keep the battery weight in the middle of the bike. Parts will come of a downhill mountainbike (triple front forks, big hydraulic disc brakes, 26" wheels. It needs to keep 30MPH for a while on flat roads without too much pedal effort.
Since I'm so happy with my downhill bike, I'm really considering getting a BBSHD again but with a 46T or 52T chainring to lower the cadence at 30MPH. I won't need all the climbing power, so this seems like a good trade-off. Since this bike is not for serious off-roading, I have no issues with a hub motor either. The QS205 is so popular, I'm doubting if I shouldn't consider this option as well. My biggest issue is that I want/need a PAS eBIKE, not a throttle-moped (although I have no problem with people wanting that). The QS has a single freewheel, so if I gear it for a comfortable cadence at 30MPH, it will be a very low cadence at 10-12mph).
Has anybody done a decent PAS integration with a QS? How naturally does it handle? Perhaps even a Torque sensing PAS system? Any suggestions on a Torque sensing BB that fits the Qulbix 76 Frame? (I believe it has a 83mm BSA BB)
All opinions, suggestions, information, experiences are welcome. But please don't turn this in another MID vs HUB discussion. I have both and aknowledge the advantages of both system. I'm just asking for opinions on which would better suit my current build (commuter bike that handles well with a natural feeling PAS).
thanks