Gearing change for Moscow

It was new chain time and I figured it was a good idea to change the freewheel as well. Leon Cycles sell the replacement 7 speed freewheel cheap enough but they really aren't great. I also wasn't particularly happy with the gearing, especially at the top end so I decided to put a Sunrace MFM4S (13-34) wide range 7 speed freewheel on as a replacement and I am really pleased with it. The jump between 1st and 2nd (10T) is quite big but I don't really use 1st unless I'm going up 15%+ climbs and in 48-13 I can happily get to 50km/h (30mph), where possible, without pedalling too madly. As @Sierratim will remind everyone - make sure you buy a freewheel as a replacement and not a cassette. And if you go for the MFM4S you will need a longer chain too - I bought a KMC 8 speed and took two links out of it.
 

RJC

Active Member
It was new chain time and I figured it was a good idea to change the freewheel as well. Leon Cycles sell the replacement 7 speed freewheel cheap enough but they really aren't great. I also wasn't particularly happy with the gearing, especially at the top end so I decided to put a Sunrace MFM4S (13-34) wide range 7 speed freewheel on as a replacement and I am really pleased with it. The jump between 1st and 2nd (10T) is quite big but I don't really use 1st unless I'm going up 15%+ climbs and in 48-13 I can happily get to 50km/h (30mph), where possible, without pedalling too madly. As @Sierratim will remind everyone - make sure you buy a freewheel as a replacement and not a cassette. And if you go for the MFM4S you will need a longer chain too - I bought a KMC 8 speed and took two links out of it.
Can I ask if yours is a standard or plus moscow? What display and battery are you using?. Not seen anyone who can get 30mph from one.
 
Can I ask if yours is a standard or plus moscow? What display and battery are you using?. Not seen anyone who can get 30mph from one.
Standard Moscow with the standard 48V battery, a 250W motor and the off road C7 display. Anything above 20 mph is me pedalling (no assist by then).
 
Any way to bypass that silly cut off point?
It's not really a cut off as such, it's just the amount of power that is available from that motor/controller combination. I think some people have experimented with changing the motor and/or controller but I am not sure how successful they were.
 

kmccune

Active Member
It's not really a cut off as such, it's just the amount of power that is available from that motor/controller combination. I think some people have experimented with changing the motor and/or controller but I am not sure how successful they were.
Controller should be first thing, 15-22 amp controller would probably give the motor all it can use, the best use of limited wattage would probably be mid drive, some of those restricted hub drives are more than likely derated, the Hub drive motor on the XC100 is ridiculously tiny, I do not understand why Eahora, would sale that bike for a hilly area.( I know we were talking about the Moscow-I just mentioned in passing how different manufacturers would derate their products .Eahora offered to sell Me an 18 amp controller for $79(with after the $20 discount)
I finally sold the XC100 to a flatlander for $400 with 8 miles on it, I figured buying another controller would be throwing good money after bad,it was a shame too,I really liked the bike, it turned out to be useless for my situation, the company wasn't very helpful, just mentioning that 198# overloaded the bike( really?)