Posted by: Hepcat
Ever try a BMX on the pump track? Every little pump and input equals momentum.
They're available in top tube lenghts long enough to fit anyone.
I regularly ride my DJ bike on the track, but it's a boat. On my buddy's 24" BMX I'm 7 seconds faster per lap and it's heaps more fun.
Buddy's 6'4" on a 21" top tube, but they're available up to 22" top tubes.
Yep! For a pump track, go for a proper race BMX and follow the fit guide for your height. BMX geometry is quite dialed and a 0.25-0.5" difference in top tube is quite remarkable. You risk regretting it if you go up 1 or 2 sizes on a BMX.
A long reach improves stability, which is good for a MTB when you ride fast on a rough trail, but you don't really want that on the BMX track. What you want is a bike with a very quick handling. Also, don't worry about the steep HA. I hate riding pumptracks on a mountain bike. The slack HA make it feel super sluggish. I like my BMX bike steep (74.5deg) as much as I like my MTB slack (<65deg).
Another thing: Make sure you buy 29" or larger handlebars. 29" is the widest allowed in the UCI rule book for BMX racing. It sucks when you're used to wide bars.