Flatten Your bike kit

House-train your existing bike


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



Flatbike Guarantee

NOTE: These are now back in stock.

The Flatten Your Bike kit combines a folding THINstem with a set of pop-off pedals. Once these are installed, your bike will remain rugged and ridable, yet can become as narrow as your rear wheel any time you need it to for storage—in the garage, shed, hallway, walkway, cubicle, spare bedroom…any place a full-width bike is inconvenient.

Installation is as easy as swapping out your existing pedals and threadless stem. Before ordering a Flatten Your Bike kit, you will need to know three things:

  1. Do you have a threadless stem? (A threadless stem is one that connects to your fork by gripping the outside of it. If you do not currently have a threadless stem, you will need a threadless stem adapter to use this kit).
  2. What is the diameter of your handlebars where they go into the stem? (It will be either 1 inch or 1.25 inches.)
  3. What pedals do you want? (1″ stems are paired with flat pedals, but 1.25″ stems can have either flat or MTB pedals.)

Why buy a Flatten Your Bike kit:

  1. You want to keep your bike, but it’s often in the way when parked.
  2. You would park your bike in a garage, hallway, room, or cubicle if you had the space.
  3. Parking your bike indoors reduces rust and extends the useful life of your bike.
  4. Save $13 off the cost of a folding stem and pop-off pedals separately.


  • Available in three kits: 1″ (by 90mm long) stem with pop-off road pedals, OR  1.25″ (by 70mm long) stem with pop-off road pedals, OR 1.25″ (by 70mm long) stem with pop-off MTB pedals)
  • Replaces a threadless stem.
  • Latches of pop-off pedals are compatible with all cranks and interchangeable with other Flatbike pop-off pedals.

THINstem learning video #1: Why install a THINstem?

THINstem learning video #2: What to know about threadless stems

THINstem learning video #3; Choosing the right THINstem

THINstem learning video #4: Installation.