First, you need to confirm your wheel size, we only offer 26" and 28" (29", 700c), with wheel widths is 1.5-1.95 inches, if it is ES Everest MTB 26", the wheel width is 1.95- 2.35 inches.

You can find your wheel size on the side of the tire of your existing wheel.

If you are not sure about your rim size, you can contact us at support@kirbebike.com.

36V 250W with 36V13AH battery: 30-40km
48V 350W with 48V 12AH battery 40-50KM
48V 350W with 48V 16AH Mileage: 60-70km
48V 1000W with 48V 12AH Mileage: 30-40KM
48V 1000W with 48V 16AH Mileage: 40-50KM

Mileage rates are based on a 170-pound rider riding a 30-pound bike on a flat paved surface, with no wind, using the motor, and no pedals. Your mileage may vary, but most people get more miles than advertised. For best mileage, we recommend pedaling with the motor on.

Most of our electric bike conversion kits can reach a top speed of 25-30 Km/h, but the 1000W model can reach speeds of 45-50 Km/h. These speed limits are primarily set by the laws governing bicycles. Requirements for bicycles with a top speed of more than 25 km/h may require additional permits and are subject to different traffic regulations.

We stand by the quality of our products.

· 7-day money-back guarantee on all orders. Please contact us to return items for a refund.

·Lifetime technical support. Contact support@kirbebike.com for assistance from our team of experts.

· 1-year extensive warranty on all retrofit kits. See the Warranty and Returns Policy for details.

You read that right, free shipping on all orders*! (*Only for orders in 48 consecutive states.)

Free Shipping to Austria, Belgium, Bulgaria, Croatia, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Italy, Latvia, Lithuania, Luxembourg, Netherlands, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, UK.

We place great emphasis on quality control from the start of production to the end, and each kit is rigorously tested before it leaves our store.

For complete kit purchases and any purchases that include batteries, our team will build, test and ship your kit within 2-7 business days.

For smaller items, such as accessories or components, our team takes 1-5 business days to process and ship your item.

For more details, check each kit's product page for the latest updates on availability, or email us at support@kirbebike.com.