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Bike M-check

5/8/2023

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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.
 
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    Paul Murray

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