StoneTower
New member
I purchased a Fat Bike from a family member that has a Bafang M620. It needs some work. I got 2 new inner tubes and got the tires to hold air. I was able to bleed the rear brake and get it to work. I bled the front brake for good measure. I now have a charger (which I did not before) and most things are working well. It has been years since I worked on bikes. I noticed that the derailleur looked a little off. I made a derailleur hanger alignment tool to see it the hanger was bent, and I was amazed and how far off it was.
I was able to straighten the hanger without any issues, but I think the derailleur may be bent.
Aside from this, I am not sure I like the gearing. I would like to be able to pedal the Fat Bike if I run out of battery and even in the lowest gear, it is brutal to pedal it up my driveway.
The bike has a Shimano CS-HG50-10 rear cassette and probably a 42-tooth front chain ring on the Bafang Ultra. With motor assist, there is no problem getting around, but what if I need to pedal back home. In looking up those cassettes, they are a 11-36t. With the wide rear hub on the Fat Bike, the chain line sucks (in my opinion).
I thought about reducing the front chainring size, but the chain is very close to the top of the chain stays on the rear suspension.
What about a new derailleur and a new (maybe) 8 speed cassette (along with a new shifter and chain that would be required. Do they make any 8 speed cassettes that will hold up to the Bafang M620 that have maybe a 48 or 50 tooth ring on the cassette?
I am looking for ideas. I would have probably never purchased a e-Fat Bike but this one had the Bafang M620 which I wanted, and the price was too good to turn down. This bike frame is the same as this one, but the rear suspension and front fork is set up to be a Fat Bike.
Thanks for your help in advance.
I was able to straighten the hanger without any issues, but I think the derailleur may be bent.
Aside from this, I am not sure I like the gearing. I would like to be able to pedal the Fat Bike if I run out of battery and even in the lowest gear, it is brutal to pedal it up my driveway.
The bike has a Shimano CS-HG50-10 rear cassette and probably a 42-tooth front chain ring on the Bafang Ultra. With motor assist, there is no problem getting around, but what if I need to pedal back home. In looking up those cassettes, they are a 11-36t. With the wide rear hub on the Fat Bike, the chain line sucks (in my opinion).
I thought about reducing the front chainring size, but the chain is very close to the top of the chain stays on the rear suspension.
What about a new derailleur and a new (maybe) 8 speed cassette (along with a new shifter and chain that would be required. Do they make any 8 speed cassettes that will hold up to the Bafang M620 that have maybe a 48 or 50 tooth ring on the cassette?
I am looking for ideas. I would have probably never purchased a e-Fat Bike but this one had the Bafang M620 which I wanted, and the price was too good to turn down. This bike frame is the same as this one, but the rear suspension and front fork is set up to be a Fat Bike.
Thanks for your help in advance.