Precision matters, and the CYC mid drive kit gives serious riders the control they need. By positioning the motor at the crank, this kit improves balance and climbing ability, especially on rough terrain. Golden Motor supplies this adaptable kit for those who want fine-tuned power delivery and pedal-assist performance. http://goldenmotor.bike/products/cyc-x1-pro-gen-4-5000w-mid-drive-conversion-kit