rivers
1 W
Update for clarification:
I have the 250 watt version.
'lightest.bike' 1.7kg 1000w mid drive
- Thread starter Grantmac
- Start date
I have the 250 watt version.
I can see why you're super frustrated.
Sent them an email to ask about the 48v/52v issue.
There's probably another "upgrade" to buy a setting to make a working meter display. 
Sad to that the noise is bad 
And the other issuses as well.
It would nice if you could post a little riding video of it, as it is very few of them.
And they seems to have very different sound the few of them i have seen.
The last one on the owners group on facebook didnt sound too bad.
So we can hope it quiets down with the time.
I'm still waiting on mine a 1000w high torque.
I am putting it on a Mondraker Foxy. I hope it turns out fine.
And the other issuses as well.It would nice if you could post a little riding video of it, as it is very few of them.
And they seems to have very different sound the few of them i have seen.
The last one on the owners group on facebook didnt sound too bad.
So we can hope it quiets down with the time.
I'm still waiting on mine a 1000w high torque.
I am putting it on a Mondraker Foxy. I hope it turns out fine.
raylo32
100 kW
I dunno, this might be too boring and easy for you after this Bikee ordeal. Photon or TSDZ2, you had better start charging your battery because that literally takes longer than to install either of these motors and be ready to ride.
raylo32
100 kW
I don't know about this one but most torque sensors employ some sort of strain gage that DOES modulate power. Just because you can't see any more movement once the chain takes up all the slack, a properly designed strain gage captures micro movements that measure how much force you are putting into the pedals. Most are probably not really accurate in an absolute sense, but are in a relative sense, as in more pedal pressure gets you more assist, just not to a highly accurate level.
So it has more of an an on-off switch type feel.. engaging per pedal stroke, then disengaging..
That's really unfortunate if so, basically it's a PAS, without the averaging/smoothing that makes a PAS roughly tolerable.
I wonder if this wouldn't be as bad on my 42T with a 48v battery.
That's really unfortunate if so, basically it's a PAS, without the averaging/smoothing that makes a PAS roughly tolerable.
I wonder if this wouldn't be as bad on my 42T with a 48v battery.
Got some math back from bikee ppl.
450v turns out to be the unloaded speed on 48v. So we have a 9.375kv motor
So what is the loaded speed? let's take an educated guess with a motor of similar efficiency, shengyi sx2 standard winding ( peaking at 88.2% eff )
The difference between loaded and no-load speed is 12.5%
87.4% of 450RPM is 393.75
At 48v:
36T chainring: 109 RPM <-- approximately the max for a short mount
42T chainring: 93.75 RPM <-- approximately the max for a mid mount
46T chainring: 85.0 RPM <-- requires the hybrid or long mount to fit a chainring this large
48T chainring: 82.0 RPM <-- May require long mount
At 52v: ( add 8.3% speed because this is a 8.3% difference in voltage )
36T chainring: 118 RPM
42T chainring: 101.5 RPM
46T chainring: 92 RPM
48T chainring: 88 RPM
I would bet we're +/- 5 RPM from reality with these calculations.
I consider anything above 95RPM to be too high.
..yeah, the dual chainring system would be better because you could adjust chainring sizes and adjust the cadence to your preference.
450v turns out to be the unloaded speed on 48v. So we have a 9.375kv motor
So what is the loaded speed? let's take an educated guess with a motor of similar efficiency, shengyi sx2 standard winding ( peaking at 88.2% eff )
The difference between loaded and no-load speed is 12.5%
87.4% of 450RPM is 393.75
At 48v:
36T chainring: 109 RPM <-- approximately the max for a short mount
42T chainring: 93.75 RPM <-- approximately the max for a mid mount
46T chainring: 85.0 RPM <-- requires the hybrid or long mount to fit a chainring this large
48T chainring: 82.0 RPM <-- May require long mount
At 52v: ( add 8.3% speed because this is a 8.3% difference in voltage )
36T chainring: 118 RPM
42T chainring: 101.5 RPM
46T chainring: 92 RPM
48T chainring: 88 RPM
I would bet we're +/- 5 RPM from reality with these calculations.
I consider anything above 95RPM to be too high.
..yeah, the dual chainring system would be better because you could adjust chainring sizes and adjust the cadence to your preference.
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It's been fun following your build. Thanks for the detailed documentation. Do you know the weight of the Bikee kit that's added to the bike? I just installed a Tongsheng TSDZ2 kit and it adds around 11 lbs to the bike (currently @ 42 lbs)
rhauff
100 mW
nervagon, you are just too much of a powerhouse and pulling the torque sensor to full deflection with ease!
In reality, results on torque sensing will vary by install as it looks like the standard and in-frame style torque arm are slightly different length and motor orientation/spacing probably affect sensitivity.
Is a stiffer spring on the torque arm a possibility?
In reality, results on torque sensing will vary by install as it looks like the standard and in-frame style torque arm are slightly different length and motor orientation/spacing probably affect sensitivity.
Is a stiffer spring on the torque arm a possibility?
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Good thing you found a way to game the system, lol.
That's an impressive speed for a 36T chainring actually, i think this indicates the high cadence..
Are you sure you don't want to try a mid mount with a bigger chainring? i have a mid mount if you want it.
That's an impressive speed for a 36T chainring actually, i think this indicates the high cadence..
Are you sure you don't want to try a mid mount with a bigger chainring? i have a mid mount if you want it.
