3D workshop

Take apart. Repair. Verify.

Three repairs. One shift.

Step into the workshop and complete three small service jobs.

Hub Fork Bearings

Choose an assembly

Choose an assembly on the bicycle or from the list. Select the fork or either wheel to find a practice repair.

A generic illustration of the assemblies. Real servicing also includes correct assembly, adjustment and checks.

Frame
The structure connecting the bicycle’s assemblies. It stays in place during the challenge.
Front wheel
The tyre, rim, spokes, hub and rotor move as one assembly. The axle connects it to the fork.
Rear wheel
The rear wheel transfers drive to the ground. Look inside the hub to see how the pawls engage when pedalling and let the wheel coast when the pedals stop.
Fork
It carries the front wheel and turns inside the frame for steering. Its suspension absorbs bumps.
Handlebars
Handlebars, stem, grips and controls come together here. This is where you steer, brake and change gear.
Saddle and post
The saddle rests on the post that enters the frame. Together they determine your seated position.
Drivetrain
Pedals, cranks, chain, cassette and derailleur transfer power to the rear wheel. They are shown together here for a closer look.