Bike Chain Lock with 2 Keys Enjoy a significantly longer battery

Enjoy a significantly longer battery life—up to 60+ miles on a single charge and 50 miles in PAS mode and 20% longer than standard batteries at 36V

you can also turn on the boost mode (long press "-") for easy pushing while walking

and assist level for effortless ride tracking

choose the best angle

electric assist and pedal modes

Bike Chain Lock with 2 Keys Enjoy a significantly longer batteryBike Chain Lock with 2 Keys The key can only be pulled out after the bike chain lock is locked, which prevents the key from being lost. Narrak bike lock comes with 2 keys. You can take one of the keys to use in daily life, and leave another key at home in case you accidentally lose one Heavy Duty Steel ChainWith 8mm thicker security heavy duty chain links, our bike lock is made of heavy duty steel known for its cut resistance and hammer resistance.