.top{margin-bottom:30px;}.top li{margin-left:5%;margin-right:5%;margin-top:10px;line-height:120%;list-style-position:outside;}Vittoria Air-Liner Light Tubeless Insert - XC Trail 29 x 2.1-2.4". The Air-Liner Light is an ultra-fast and light-weight tire insert intended for the performance rider or anyone looking to improve the reliability and performance attributes of their ride.The Air-liner Light lives by it&';s namesake coming in at a scant 55g each and will go unnoticed to even the most finicky XC racer with no loss in the benefits of using a liner Improved grip at lower pressure with greater tire stability Lowered risk of tire burping and the upside of run flat make this the leader in performance tire inserts