Upgrade shockproof, 20*4.0 all-terrain fat tires, the full shock absorption fat tires carry you through all rough terrain for comfortable riding. Dual suspensions: the alloy and hydraulic suspension system generate more power and full shock absorbance, letting you climb steep city hills or gravel slopes in comfort. Smaller size & longer range: the updated 48v 16ah removable Li-ion battery ensures a long life expectancy, the single range can be up to 75kms per charge on dedal-assist mode. Power full hub-motor with 55nm torque up to 75kms, the 750w(1000w+peak) motor powers you through any terrain, for a maximum torque of 55Nm. Hydraulic oil brake.