The Sapim SILS Internal Nipple is an inverted nipple designed specifically for use on rims which have been drilled for standard 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 versions are extremely resistant to corrosion from salty roads or aggressive bike cleaners, while an alloy version in 7075 T6 aluminium is suitable for building the lightest wheel possible.

Available in either 10mm or 12mm Brass lengths: ~0.9 – 1g per nipple, or 12mm Alloy length: 0.4g per nipple.

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