crossbreak
1 MW
Probably notProbably not. In that case, it would make sense if the final stage was 1:1 in top gear?
Probably notProbably not. In that case, it would make sense if the final stage was 1:1 in top gear?
50Nm
Well, with a 2 stage drive to the motor, it could be either.crossbreak said:It would make more sence if it was 1:1 in 2nd
I'm aware of this. But since it's 47mm in dia a hub shell would be needed to connect it with both the jackshaft and the sprocket, which adds width.CSK20 was for 6:1.
If we are going with 2 stages from motor to jackshaft then the jackshaft could be 360rpm. 52t to 13t freewheel for the pedals.
Not me personally... but it seems to be the weapon of choice around here.crossbreak said:That would mean for example 4:1 from motor to the BB-coxial sprockets and 4:1 to the jackshaft @360rpm would mean a motor speed of 5760 you wanna use an 80-100!
Would be too wide I guess. remember, we already put 3 sprockets and chains on the left side of the cranks8M PowerGrip from motor to crank?
it depends on if the motor is coaxial to the jackshaft. if so, the sprocket can be at as big as the motor and still look okay.4:1 is probably too much for crank to jackshaft on the motor side. A large sprocket on the end of the jackshaft would look a bit naff IMO
20t to 80t
1 chain and 1 belt. With 8M you could use a 10mm wide belt.crossbreak said:Would be too wide I guess. remember, we already put 3 sprockets and chains on the left side of the cranks8M PowerGrip from motor to crank?
Would match a 52t chainring on the other sidecrossbreak said:Thats 203mm in dia. Don't you think this is a bit oversized?20t to 80t
with the pedal to jackshaft overdrive on the right.1 chain and 1 belt. With 8M you could use a 10mm wide belt.
that indeed gains style pointsWould match a 52t chainring on the other side
True. The chainring would be offset quite a lot outwards and the sprocket on the rear wheel would need to be close in, so you'd still need a dished wheel = yuk.crossbreak said:A crank to jackshaft reduction on the right side would not be compatible well with the 3 or 4speed output cassette on the jackshaft
The advantage of having a shifting cassette is constant chain alignment, of course.