PARTS AND ACCESSORIES › SILCA Disc Wheel Adapter Chuck - Rated Over 300PSI Image 1 of 2 Image 2 of 2 SILCA Disc Wheel Adapter Chuck - Rated Over 300PSI $58.00 SILCA's disc wheel adapter chuck for inflating tubes through disc wheel valve holes, rated over 300 PSI.Rated over 300 PSIFor disc and deep wheelsFits SILCA pumps Purchase Added! SILCA's disc wheel adapter chuck for inflating tubes through disc wheel valve holes, rated over 300 PSI.Rated over 300 PSIFor disc and deep wheelsFits SILCA pumps