Add to Wishlist TSI STE-M Tire Siping Machine TSI STE-M Siper For High Volume Siping on Mounted or Unmounted Tires! Description: The STE-M Tire Siping Machine allows the operator to sipe both non-mounted and mounted tires with the same machine. For non-mounted tires, expandable rims are available... MSRP: $14,464.99