What is the best bike tire filler to use for optimal performance and durability?

The best bike tire filler for optimal performance and durability is typically considered to be a high-quality bicycle pump with a pressure gauge. This allows you to accurately inflate your tires to the recommended pressure levels, which can improve performance and extend the lifespan of your tires. Additionally, using a pump with a built-in pressure gauge can help prevent over-inflation, which can lead to premature wear and potential damage to the tires.