Bike M-check

One method of checking the preparedness of a bike is an 'M-check'.  So called because it forms the shape of an M starting at the front hub, travelling up to the handlebars, down to the bottom bracket, up to the saddle and back down to the rear hub. .
The below list gives a more complete list of areas to examine when performing the M-check.

Front Wheel:

• Axle nuts/quick release – tight / firmly closed.
• Spokes all present and tight.
• Brakes – secure and working, aligned and not rubbing against tyres.
• Lights/reflectors – if fitted, then tight and working.
• Tyre – check for wear, cuts and splits in the tread, and that the tyre is inflated to the correct pressure.
• Bearings – grip rim and rock back and forth to feel for loose bearings.
• Spin to check for tight bearings and poor alignment or buckled wheels.

Handlebars:

• Headset/handlebar tight with no side-side play.
• Brakes levers/gear shifters working correctly.

Chain Ring:

• Front derailleur – working correctly with smooth changes. Wires not frayed.
• Cranks – spinning freely with no side-side play.
• Pedals – fitted correctly, and free from debris. Also check cleats are clean and not worn.
• Chain – check it is well oiled and not rusty.

Saddle:

• Fitted tight, facing in the correct direction and set at the correct angle for the athlete.
• Free from rust, damage, cracks.
• Tightly secure (seat post clamp).

Rear Wheel:

• As per front wheel +
• Rear derailleur – working correctly with smooth changes.