PSF Plus® Quantity Chart PSF Plus® Quantity Chart PSF Plus® Quantity Chart for off the road tires. View or Download the PDF to find the recommended quantity for your tire size. Open the file and click on the rim size to quickly take you to the appropriate section. Download Quantity Chart MORE ABOUT PSF Plus® PSF PLUS® SDS PSF PLUS® Quantity Chart PSF PLUS® Brochure PSF PLUS® Spec Sheet