The finished bike, weighing in at just 17.9lbs and using a rigid carbon fiber fork, reflects the single minded approach to looking for the fastest possible lap time. " It occurred to me that most pump track guys simply ride dirt jump bikes that are far from optimal," Chamberlain explains " If you want to go fast, then you need to look at BMX bikes, so that is where I drew inspiration. It's from exercises like these that he and Specialized learn about what works and what doesn't, and Chamberlain knows that what works on a pump track is the BMX approach. The Stumppumper concept bike is a purpose built pump track machine that weighs just 17.9lbs, but its light weight is only part of the story.įocused intention: Chamberlain is well aware that the Stumppumper concept is a single minded approach to a niche aspect of our sport, but that didn't stop him from exploring the idea of a purpose built pump track bike. But what if someone put some time and resources towards assembling a purpose built pump track weapon that is designed solely to rail berms and pump rollers? Specialized's Jason Chamberlain did just that when he set out to build the ultimate pump track bike. Show up at any track, be it a local hidden gem or a world class monster like the one at last year's Kokanee Crankworx, and you'll likely see the majority of riders on their dirt jump bikes. What hasn't evolved much, though, is the bikes being used.
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That, of course, quickly led to ever advancing pump tracks that grew is size and difficulty. While banging out laps on a pump track is a great time, it doesn't take much for it to turn into a competition of sorts inevitably the stop watches come out and riders are battling each other for the fast lap times. The popularity of pump tracks has skyrocketed over the last few years, with more and more of them popping up in not only backyards, but also at major events around the world.