How to Disassemble a Tiagra Crankset

Your Shimano Tiagra crankset is part of a series of bicycle components designed for sport and fitness riding. The 2-piece crankset consists of a left and right arm linked by a spindle. This spindle remains permanently attached to the right-side arm. A bolt joins the left-side arm to the other end of the spindle. Disassembling your Tiagra crankset offers an ideal opportunity to clean it of grime accumulated through normal use.

Things You'll Need

  • 5 mm hex key
  • Shimano TL-FC16 tool or equivalent
  • Flat blade screwdriver
  • Rubber shop mallet
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Instructions

    • 1

      Locate the pinch bolt at the end of the left Tiagra crank arm. Use a 5 mm hex key to loosen this bolt.

    • 2

      Insert the nub on the side of the TL-FC16 tool, or its equivalent, into the end cap that secures the left arm to the spindle.

    • 3

      Twist the end cap tool counterclockwise, loosening the end cap. Remove the end cap.

    • 4

      Note the seam at the end of the left crank arm, where the crank arm attaches to the spindle. A piece called the "stopper plate" resides within this seam.

    • 5

      Use a flat blade screwdriver and gently wedge the plate into the up position, away from the crank arm.

    • 6

      Tug on the left Tiagra crank arm to detach it from the spindle. Set the arm aside.

    • 7

      Tap the exposed end of the crank spindle with a rubber shop mallet to dislodge the right Tiagra crank arm.

    • 8

      Tug on the right crank arm to remove it from the bicycle.