Effetto Mariposa TyreInvader Tubeless Tyre Insert This lightweight tubeless tyre insert has been constructed from high-density EVA, making it a durable and reliable impact absorber for riders who needed extra protection for their tyres. This pack includes two easy-to-install inserts which work in harmony with your tyre's sealant to create a perfect all-round puncture protection system.Features: Includes: 2x Tyre Inserts Rim Widths: 20-30mm (40), 25-35mm (50), 30-40mm (55) and 35-50mm (60) Weight: 53g - 92g Buy Effetto Wheels & Tyres from Chain Reaction Cycles, the World's Largest Online Bike Store.