E*thirteen Helix Plus Cassette - 12-Speed 9-50t Color:Black Our ultra compact battery supplies

Our ultra compact battery supplies 3x the juice of other competitors and has a USB port for easy mobile charging

You can slide heavy pots and pans over the cooktop without lifting thanks to continuous

Do not let a little sweat or rain ruin your fun

this innovative battery has a capacity of 173wh/15600mah and works for more than 4 hours when the working temperature is set at -20 ℃

E*thirteen Helix Plus Cassette - 12-Speed 9-50t Color:Black Our ultra compact battery suppliesHelix Plus 12 Speed 9 50T cassettes are a drivetrain upgrade on a budget for analog and e bikes alike. Engineered to deliver Helix shifting precision, and cross compatibility with all SRAM and Shimano 12 speed drivetrains, the Helix Plus is also e*spec rated to withstand the rigors of e MTB. e*thirteen's exclusive 9 tooth highest gear cog, provides a 556% gear range, and lets you step down one chainring size, while keeping the same top end gearing,