ScooterMan101
1 MW
Problems is a general term, so here you are ...
In regards to hub motors being less problematic than the other drive systems, I agree , in fact that is why I am so much interested in improvements on hub motors, and am going to buy another hub motor and ... not buy the BBS02 .
The the problems I talk about in regards to hub motors, are:
No gearbox/transmission, so in order to run it in its most efficient rpm , others here have stated that you have a small speed range that the hub motor will run
in it's most efficient rpm range.
and
Less cooling than say a mid drive like the bbs02
and
The fact that the hub motors that we have available to buy , now, have been designed , years ago, they mostly just fit onto them a 7 speed or 8 speed freewheel , and only in a couple of instances
are they available to fit on a 8 or 9 speed cassette. while still staying at 137 mm or less dropout spacing,
However,
anyone who has gone to bike shops in the last couple of years
has seen the proliferation of 10 and 11 speed cassettes, along with the dropping of the 3 chain ring crank ..in favor of 2 chain ring cranks, and now in 2016 more and more,
Single chain ring cranks with 11 speed cassettes.
When a costumer wants to convert a bike ( DIY ) to electric , he wants to use the bike they have , not go out and buy an older bike .. or a cheep / heavy big box store bike.
We want to have a Kit, or at least a hub motor that will work with the current bikes with 10/11 speed cassettes , 10/11 speed chain rings , 10 or 11 speed chain, 10 or 11 speed shifters, and Derailleurs !
...
That is a , Very Reasonable Expectation, a hub motor that will work with a modern bike of the last 5 to 7 years ( 9 speed too ). That is Very Reasonable to have a kit-Hub Motor that will work with our bikes.
Another Reasonable Expectation is to have improvements,
example : I have personally seen how cars were 40 years ago, and how they are now, most people do not want to drive what was available 20-30-40 years ago,
I can tell you the cars of 25-40 and more years ago, drove like tanks, like boats, they leaned around every turn, could not stop very well, got 6-10 miles per gallon, with no airbags, etc.,
That is a good analogy to what we are seeing with the current generation of hub motors .
Improvement is ... Good
In regards to hub motors being less problematic than the other drive systems, I agree , in fact that is why I am so much interested in improvements on hub motors, and am going to buy another hub motor and ... not buy the BBS02 .
The the problems I talk about in regards to hub motors, are:
No gearbox/transmission, so in order to run it in its most efficient rpm , others here have stated that you have a small speed range that the hub motor will run
in it's most efficient rpm range.
and
Less cooling than say a mid drive like the bbs02
and
The fact that the hub motors that we have available to buy , now, have been designed , years ago, they mostly just fit onto them a 7 speed or 8 speed freewheel , and only in a couple of instances
are they available to fit on a 8 or 9 speed cassette. while still staying at 137 mm or less dropout spacing,
However,
anyone who has gone to bike shops in the last couple of years
has seen the proliferation of 10 and 11 speed cassettes, along with the dropping of the 3 chain ring crank ..in favor of 2 chain ring cranks, and now in 2016 more and more,
Single chain ring cranks with 11 speed cassettes.
When a costumer wants to convert a bike ( DIY ) to electric , he wants to use the bike they have , not go out and buy an older bike .. or a cheep / heavy big box store bike.
We want to have a Kit, or at least a hub motor that will work with the current bikes with 10/11 speed cassettes , 10/11 speed chain rings , 10 or 11 speed chain, 10 or 11 speed shifters, and Derailleurs !
...
That is a , Very Reasonable Expectation, a hub motor that will work with a modern bike of the last 5 to 7 years ( 9 speed too ). That is Very Reasonable to have a kit-Hub Motor that will work with our bikes.
Another Reasonable Expectation is to have improvements,
example : I have personally seen how cars were 40 years ago, and how they are now, most people do not want to drive what was available 20-30-40 years ago,
I can tell you the cars of 25-40 and more years ago, drove like tanks, like boats, they leaned around every turn, could not stop very well, got 6-10 miles per gallon, with no airbags, etc.,
That is a good analogy to what we are seeing with the current generation of hub motors .
Improvement is ... Good