Double wall, sleeved joint bmx rim intended for front wheel racing applicationsG69 material is super light with superior strength over 6061 T6Each TCS Mischief rim comes drilled for TCS and Schrader, with a valve plug for the unused valve holeTCS2.0 introduces an additional channel easier setup and improved sealing20inAlienationMischief40622.927.519.5DblNMSWBlue36PV/SV290g386