• Stem Risers For Threadless Headsets
• Threaded Vs Threadless Fork

Threadless headsets are adjusted by pressure on the top bearing race. Pressure is applied when the bolt in the top cap is tightened. The stem bolt(s) must be loosened, which makes the stem effectively a spacer during the adjustment. The bolt is threaded into the star fangled nut which be fitted into the inside of the fork column. The star nut is designed not to pull upward. In other words, it is designed not to be removable.

The star-nut outer diameter is slightly bigger than the inside diameter of the fork column. This allows the flanges to bite into the fork walls and hold it tight. 6 Expansion Plug Installation Another option for threadless headsets is the “expansion plug” system. These insert inside the steering column and then expand and jam against the inside walls.

Stem Risers For Threadless Headsets

This system is especially popular with the carbon steering columns. A typical expansion plug system consist of an expandable sleeve.

Threaded Vs Threadless Fork

There is a cone at the top and bottom, and a hollow bolt passes through the sleeve. Futura font download. As this expansion bolt is tightened, it draws together the two cones and this expands the sleeve. As with most all threaded fasteners, grease or oil the threads. The headset adjusting cap and bolt then fit into the top of the expansion plug.

It is a Very Bad Idea to install a threadless headset so the handlebar stem is supported by the. You can install a threadless headset on a threaded fork. How to install a threadless headset This is an excerpt from Essential Bicycle Maintenance & Repair by Daimeon Shanks. Install Fork Crown Race. Installing threadless fork for the first time. 4- Put the fork in the tube, install the remaining pieces of the headset. 5- Put a couple of spacers on.