Spoke nipple

A spoke nipple - in short nipple - is a screw connection from the rim to the spokes in the wheel of a bicycle. The nipple is usually made ​​of brass, rare aluminum. When the tires fitted to the nipple is best with a special tool, the nipple clamps adjust. If no tires mounted, the adapter can be adjusted from the outside with a screwdriver.

Technically, nipple square sleeve nut, the most common sizes ( width across flats ) are:

  • 0.127 " ( 3.23 mm)
  • 0.130 " ( 3.30mm)
  • 0.136 " (3.45 mm)

The thread must match the spoke. Commonly used are spoke ends with 2.1 mm diameter (DIN 79012, Fg 2); There are also 1.8 to 2.3 mm (DIN 79012, Fg 2,3). In exceptional cases, a diameter of 3 mm is used (eg in the spokes of zinc ). The nipples are easily confused.

Nipples are available in various lengths (12 mm, 14 mm, 16 mm). With longer nipple can - within certain limits - use spokes that are actually a bit too short. Especially with aluminum nipples, make sure that the entire nipple thread is used. Otherwise the nipple tear out easily.

Aluminium
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