Delivers approximately 200% greater airflow than the Mk2 Presta valve Valve mechanism located inside the rim. In the case the valve stem breaks, the tire still retains air Made from 7075 aluminum Fully serviceable TECH SPECS table{border-collapse:collapse;width:100%;} td{text-align:left;padding:8px;font-weight:350;} tr:nth-child(even){background-color:#f2f2f2} th{background-color:#eb212e;color:white;text-align:left;padding:8px;} .desc .specs-heading{font-size:24px;font-weight:600;padding-top:35px;border-top:3px solid #f0f0f0;display:inline-block;border-bottom:4px solid #eb212e;width:142px;margin:0;} Model Holeshot Fast Flow Length 42mm Color Slate Valve Presta Insert Compatible Yes Package Pair