ok start of the changes and the bike is not even up and running!
again I must firstly thank ES for the knowledge of its members in these matters and especially Boostjuice :wink:
It looks very much like optimizing the gearing is a worthwhile task with the cyclone kits to keep motor heat down and also to allow high speed pedal assist and therefore increased range and climbing ability.
So....after reading through the threads here and the use of Sheldon Browns excellent gear calculator, I realised that the stock setup of 44,44,32 on the front was not going to cut it at 48v. It had to be reduced by quite a lot!
What I ended with (although still not tested in the real world) was;
front is now 64,48,32...yes thats correct 64 tooth
, to keep with the 104mm bcd of the mtb cranks this had to be custom made-thanks here goes to Sydney Australia and John at Cycleunderground chainring designs http://www.cycleunderground.com.au
...although it did take a while... excellent job
the 48t is a standard Shimano mtb chainring and was the largest I could find in 104mm bcd.
the 32t remains as purely a point to secure the other two rings.
Crank gearing sorted I then found that due to the wide bottom bracket axle used by cyclone that the pedal on the non drive side was very close to the ground for cornering
solution here was to replace the stock crank with something a little shorter; this was done by a set of Neon Bow 162mm trials cranks and oh just to be on the safe side the freewheel was replaced by the Sickbikes Eno
this is how the crankset looks now;
Ian