The knob for Ladybug, Matchless, and Sidekick wheels has a small screw with washers, a small metal shaft, a metal collar, and a black plastic knob. On Matchless and Ladybug wheels, this part installs on the mother-of-all (MOA). On Sidekick wheels, this part installs on the right wheel side. On all wheels, the plastic knob sits on the right.

For all Flatiron wheels, if you need to replace the Scotch tension peg, you will need to replace the entire MOA.

For Ladybug wheels with the old (flat) MOA, you'll need this peg.

Matchless wheels with the old (flat) MOA had a Scotch tension rod that is no longer available.

If you need a peg for the Schacht-Reeves, please contact us.

For Ladybug and Matchless wheels:

1. Untie or cut off the knot holding the scotch tension spring and string to the shaft, inside the MOA. Completely remove the string from the hole in the shaft.
2. Use a small Phillips screwdriver to remove the screw in the old plastic knob. Remove the plastic knob from the right side of the MOA.
3. If you don't need to replace the shaft, hold it in place from the left with a nail or unbent paper clip. If you are replacing the shaft, tilt the wheel to the left until the old shaft falls out.
4. Prepare the new knob by removing the small screw and washers holding the black plastic knob, shaft, and mounting ring together. In the unlikely event that the mounting ring on your wheel needs to be replaced, contact Customer Service. You can discard any parts you do not need to replace.
5. If necessary, insert the new shaft into the left side of the MOA. Hold it in place with a nail or unbent paper clip. 
6. Insert the small screw through the washers, then through the black plastic knob. Set these parts in place on the right side of the MOA. Fully tighten the screw into the shaft.
7. Reinstall the spring and string, or install a new spring and string as described in your wheel's assembly manual.

For Sidekick wheels:

1. Prepare the new knob by removing the small screw and washers holding the black plastic knob and shaft together.
2. Untie or cut off the knot holding the scotch tension spring and string to the shaft. Completely remove the string from the hole in the shaft.
3. Use a small Phillips screwdriver to remove the screw in the old plastic knob. Remove the plastic knob from the right wheel side. If you also need to replace the old shaft, remove it from between the wheel sides.
4. From inside the wheel, hold the old shaft in place so you can reinstall it or set the new shaft in its place.
5. Set the new knob, screw, and washers in place on the shaft. Fully tighten the screw into the shaft.
6. Reinstall the spring and string, or install a new spring and string as described in your wheel's assembly manual.