Pirelli Standard Front Inner Tube 80/100-21 / 90/90-21 Pirelli inner tubes are a good heavy duty inner tube. Available in a multitude of sizes.

Pirelli Standard Rear Inner Tube 90/100-16 Pirelli inner tubes are a good heavy duty inner tube. Available in a multitude of sizes.

Pirelli Standard Front Inner Tube 70/100-17 Pirelli inner tubes are a good heavy duty inner tube. Available in a multitude of sizes.

Pirelli Standard Front Inner Tube 70/100-19 Pirelli inner tubes are a good heavy duty inner tube. Available in a multitude of sizes.

Pirelli Standard Rear Inner Tube 90/100-14 Pirelli inner tubes are a good heavy duty inner tube. Available in a multitude of sizes.