The Sapim SILS Internal Nipple is an inverted nipple designed specifically for use on rims which have been drilled for internal nipples.

The nipple uses Sapim’s SILS locking dimples which provide a slight crimp to the nipple threads, helping to ensure that nipples cannot unwind due to vibration or changing load under impact. The Sapim SILS Internal Nipple can only be trued from inside the rim with a 3.2mm square driver.

Nickel coated brass is extremely resistant to corrosion from salty roads or aggressive bike cleaners. 12mm in length, 1g per nipple.

Riders requiring standard external nipples should consider the Alpina ABS Nipple.