This tire insert from Tannus is designed to add puncture protection and sidewall support inside compatible bicycle tires, helping reduce flats caused by sharp impacts and debris. Positioned between the tire and inner tube, it absorbs shock and helps prevent pinch flats while allowing riders to run lower pressures for improved comfort and traction. The foam construction also provides a level of support that can help maintain control in the event of sudden air loss, making it a practical upgrade for cargo bikes, e-bikes, and high-volume tires used on rough terrain or urban streets.