How to Disassemble a Tiagra Crankset

Written by matthew ferguson
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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.

Skill level:
Moderately Easy

Things you need

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

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  1. 1

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

  2. 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. 3

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

  4. 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. 5

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

  6. 6

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

  7. 7

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

  8. 8

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

Tips and warnings

  • Some models of Tiagra cranksets may have a spacer or two between the left crank arm and the frame of the bicycle. Removal of the crankset is the same, but keep a close eye out for these spacers to prevent possibly losing them.

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