Finally the chinese have got the crank drive motor right and are giving very high torque figures,the Kudos Ibex TCM motor has 60Nm torque at the motor,however with a throttle this torque is too suddenly delivered and that is the reason we are nervous about putting a throttle on the bike.
Our original samples used the cheap Shimano Tourney gears,these were rapidly destroyed by the motor,we have upgraded the gears to the stronger Alivio system,without further testing I would not be happy about connecting hub gears to these new crank drive motors. With a powerful rider the problem is obviously worse.
Standing on the pedal whilst operating the full throttles corkscrewed the gears.
I think the Alivio system is about the minimum quality that should be fitted with these new crank drive motors,with or without throttle. The Deore system is even stronger but difficult to source from Shimano at present.
I suspect it is one of the reasons why Bosch would not fit throttles on their system,aside from the fact that throttles are illegal in their prime market-Germany.
The TCM motor is now being offered to many of my chinese suppliers and I have been offered samples using that motor from many suppliers,some using the cheapo Tourney gears,I am sure many of these bikes will be offered by the cheap internet sellers-looking at the grief many testers gave my Ibex on the test track at London Excel Cycle Show and the thousands of testing cycles that my supplier performed on the bike,I am confident that the Alivio gear system will take the abuse but nothing less and not yet with a throttle.
Many testers reported that the TCM motor has considerably more torque than the Bosch system and that the bike accelerated strongly.
We are trying to incorporate a throttle that allows the power to be introduced gradually so as not to shock load the chain and gears,this is still under development.
If you want a throttle the BPM hub drive motors with low speed torque (we called it the TOP system)is probably a better choice as the sudden torque caused by quick full throttle operation at worst will just cause wheel spin.
Dave
Kudoscycles
Our original samples used the cheap Shimano Tourney gears,these were rapidly destroyed by the motor,we have upgraded the gears to the stronger Alivio system,without further testing I would not be happy about connecting hub gears to these new crank drive motors. With a powerful rider the problem is obviously worse.
Standing on the pedal whilst operating the full throttles corkscrewed the gears.
I think the Alivio system is about the minimum quality that should be fitted with these new crank drive motors,with or without throttle. The Deore system is even stronger but difficult to source from Shimano at present.
I suspect it is one of the reasons why Bosch would not fit throttles on their system,aside from the fact that throttles are illegal in their prime market-Germany.
The TCM motor is now being offered to many of my chinese suppliers and I have been offered samples using that motor from many suppliers,some using the cheapo Tourney gears,I am sure many of these bikes will be offered by the cheap internet sellers-looking at the grief many testers gave my Ibex on the test track at London Excel Cycle Show and the thousands of testing cycles that my supplier performed on the bike,I am confident that the Alivio gear system will take the abuse but nothing less and not yet with a throttle.
Many testers reported that the TCM motor has considerably more torque than the Bosch system and that the bike accelerated strongly.
We are trying to incorporate a throttle that allows the power to be introduced gradually so as not to shock load the chain and gears,this is still under development.
If you want a throttle the BPM hub drive motors with low speed torque (we called it the TOP system)is probably a better choice as the sudden torque caused by quick full throttle operation at worst will just cause wheel spin.
Dave
Kudoscycles
