MAHLE SmartBike Systems x20 Energy Hub - USB-C Charge Port Range Extender Battery ModelNumber=E3920 fits Avid BB5/Promax Render/Decipher compound

fits Avid BB5/Promax Render/Decipher compound organic

and all-day speed

Misc Graphite Silver Primary Color Silver Size M Helmet sizing in cm 54 - 58cm e-Bike approved No Integrated Light No Visor No Impact Protection System MIPS Certification CPSC

Rim Width (Internal) 76

} Two full complement cartridge bearings with labyrinth seals

MAHLE SmartBike Systems x20 Energy Hub - USB-C Charge Port Range Extender Battery ModelNumber=E3920 fits Avid BB5/Promax Render/Decipher compoundThe Mahle Energy Hub attaches to the range extender battery and provides a power port to charge additional electronic devices while you ride. Includes 65cm USB C cable.