Bafang BBS-02 48volt 750watt Motor Assist - More power than the 500w version; this is a great option for those of you who are really into off-roading or for those who always seem to be climbing steep hills. The Bafang is a surprisingly quiet mid drive option that will add a lot of power to your ride. This is a great set up for those of you with a single chainring on your front crankset.
48v Panasonic Bottle Battery - 13s4p = 52 Genuine Panasonic 18650 cells (see breakdown on 18650 cells)
11.5ah or 13.5ah depending on cell choice
550 or 650 watt hours
30 amp output
Only 7.5 pounds
Life Expectancy 500-1000 charges
Dimensions: 15.5 x 3.5 inches (just battery)
16 inches with mount
SRAM X.4 Long Cage Rear Derailleur - 7/8/9 Speed - Affordable and reliable derailleur is great for repairs and upgrades.
-Compatible with 7-, 8-, and 9-speed systems
-1:1 shifter-to-derailleur actuation ratio for precise light-action indexing