Giro Chrono Expert Wind Vest BSS-000454 the cassette lock ring holds

the cassette lock ring holds 20 magnets that are detected by the integrated dropout sensor

Optional cleat: SM-SH10

Tubeless Ready: Tubeless tyres provide the rider with many benefits: the ability to run lower air pressures

Touchscreen Technology for use with mobile devices

giving a 70% boost to the internal battery's charge

Giro Chrono Expert Wind Vest BSS-000454 the cassette lock ring holdsAbout Giro Chrono Expert Wind Vest Windproof Your Core. The Chrono Expert Wind Vest is a go to barrier against wind and chill, and an ideal mid layer that pairs perfectly with a jacket when rain or colder temperatures demand it. The 2 way stretch wind proof ripstop fabric packs down into a jersey pocket with ease and the form fitting silhouette features a DWR coating to resist damp conditions and grime. A perforated back panel helps to optimize