What is that pump track bike?

Lee:

Have enjoyed several of your articles and we’re planning to build a pump track this year.

Was really intrigued by your bike featured in the MBAction article about the school pump track. Didn’t see it listed on your list of bikes on your site. MBA said it was a modified P bike, I assumed they meant Specialized P bike, but it doesn’t look like anything on their site.

How about a run down of what it is …

Best regards,
Brent Mullen

Hey Brent,

Thanks for writing. You are referring to Captain America, my experimental Stumpjumper HT EVO-R. The Captain is my attempt to go back to an all-around hardtail that rips on trail, jumps and pump track (and pulling a double baby trailer).

Captain America fights for truth, justice and pump tracks.

When it comes to dedicated pump track riding, a dedicated pump track bike like a Specialized P.3 feels better. Big surprise: The slacker head angle, lower position and shorter rear end makes the bike feel more stable AND more flickable. But the Captain works just fine, and he’s a lot more versatile.

Pump track setup update: For dedicated pump track action at Sea Otter, I rocked a 50 mm Answer DH stem and Specialized Rhythm Lite tires. Braaap!

Captain America

Build
Frame: Specialized Stumpjumper M5 HT

Fork: Fox 831

Wheels: Sun Charger Pro

Brakes: Hayes Stroker

Bars: Answer ProTAPER 780 DH

Stem: Answer ROVE AM 70 mm

Pedals: Answer ROVE FR

Chain guide: Gamut P20 with 33t Race Ring

Seat post: X-Fusion Hilo 100

Drivetrain: A mix of Shimano and SRAM (purchased the old fashioned way)

Total weight: 24 pounds with a normal seatpost, which didn’t allow enough seat adjustment. Just under 25 pounds with the Hilo. Now I can get the seat from full spin to full braaap.

Background: Experiment: Stumpjumper HT EVO-R

Know more. Have more fun!

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