A practical conversion tool kit designed specifically for bicycle tires. It includes a Presta/FV to Schrader/AV adapter and a valve extender, delivering a 2-in-1 solution. Precision-machined from aviation aluminum, it is lightweight, corrosion-resistant, and helps resolve compatibility issues between different air pump interfaces. - All-in-one conversion: Presta/FV to Schrader/AV adapter plus valve extender in a single compact tool. - Broad compatibility: works with standard Presta (FV) and Schrader (AV) pump heads, enabling easy inflation on mixed systems. - Durable and lightweight: aviation aluminum construction provides strength without weight and resists corrosion. - Compact and portable: small footprint fits in a saddle bag, tool kit, or jersey pocket. - Reliable performance: precision machining ensures a snug seal and smooth pumping action. Use scenarios - On a ride when your pump head is Schrader but your tire has a Presta valve: use the adapter to inflate without changing pumps. - Reaching a deep-set or recessed valve on a road bike: attach the valve extender for easier access and inflation. - Traveling or roadside repair: carry the kit to handle different valve standards at hotels, shops, or along the trail.