MET Downtown MIPS Helmet - Black Glossy Medium/Large MFPN=IF7438-5 This link explaining 148mm Boost

This link explaining 148mm Boost spacing will help you decide if you need the M5 or M8

Length 130 Color Black Flange No Lock On No Weight 65 Grip Shift Specific No Defined Color Black Shape Round

Compatible with TQ HPR 50 motor system

Wunder Shine Bike PolishRemoves imperfections and fills minor scratches

MET Downtown MIPS Helmet - Black Glossy Medium/Large MFPN=IF7438-5 This link explaining 148mm BoostThe MET Downtown MIPS is a truly modern touring helmet ready for a weekend trek or the daily bicycle lane. The internal air channeling and large number of vents provide exceptional ventilation. The 360 head belt and lightweight design ensures that there will be no pressure points on the skull. Featuring the MIPS C2 rotational management system the Downtown is able to slide against the head in the case of a crash redirecting damaging rotational motion.