About this item

• Compatible with round seatposts only. Exposed seatpost length must be greater than 6 inches. Seat tube clamp height must not exceed 4/5 inch above the highest point of the rear wheel.
• 30s Tool-Free Installation: Converts your bike into an electric bike in 30s without disassembly and extra tools.
• Suitable for any bicycle with Round Seat Post Φ25.4~31.6mm. Compatible with road bike tire width: 1.5/1.75/1.95/2.15inch and mountain bike tire model: 25C/28C/35C/38C.
• Up To 31 Miles Range: On a full charge, it could drive a distance of up to 31 miles (50km) in HALF boost mode. Actual range may vary based on terrain and load.
• APP Control: You can check the real-time power level of the booster and switch the booster mode through the app on your phone, and it also shows the real-time data of your riding.
• [FRIENDLY SUPPORT] BAOSHISHAN take the responsibility of 2-year warranty and lifetime after-sales support.