The replacement Topeak Smarthead Pump Head was easy to swap over from my overly tired one and has brought my Track pump back into service at a fraction of the cost of a new pump, the rest of it was perfectly functional with many years life left. So this solution was also environmentally sound. It is great that Topeak supply this as a replacement part and also that Biketart stock such spare parts. The sign of a quality retailer in my book. Ordering was smooth and delivery very quick. Great, thanks.