CHANGE 633 frame set

Build the perfect mountain bike.

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CHANGE 633 frame set

Build the perfect mountain bike.


(Free shipping in the U.S. and Canada)

Size Chart

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Flatbike Guarantee

Start with the most convenient mountain bike frame in the industry—and the only folding frame in the world certified for ruggedness. Then build it out with your own components for a custom hardtail that is uniquely yours.


  • Frame with locking devices (under seat and above bottom bracket)
  • Seat post quick-release (31.6mm)
  • Quick pop-off pedals (standard threading)
  • Headset (1 1/8″)

Total weight, 5.28 lbs.

Ride it everywhere, put it anywhere. What are your dream components?


  1. Full-size bike folds in seconds to a trunk-size 36 inches.
  2. Secure your mountain bike away from tampering and theft after riding.
  3. Eliminates the need for a roof or bumper rack on your car.
  4. Can be stored easily indoors out of the weather, for longer life.
  5. Ships with a convenient carry bag to protect car seats.
  6. Add your own components for the ideal bike.


FRAME: Double-butted 7005 aluminum. Black matte finish.

EN 14766 certified reliability.

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