Double wall, sleeved joint bmx rim intended for front wheel racing applications New G69 material is super light with superior strength over 6061 T6 Each TCS Mischief rim comes drilled for TCS and Schrader, with a valve plug for the unused valve hole 20in Alienation Mischief 406 22.9 27.5 19.5 Dbl NMSW Gold 36 SV 290g 386