BOS oil level charts and volumes

Year Fork Type Cartrigde Travel Wheel
2017 Deville 35 sealed 160mm 26-27.5
2015 Deville Open 34 150mm 26-27.5
2015 Deville 34 34 160mm 26-27.5
2012 - 2025 Deville 34 AM Sealed 140mm 26-27.5
2012 - 2025 Deville 34 AM Sealed 150mm 26-27.5
2012 Deville 34 Open 170mm 26-27.5
2018 Obsys Boost 220mm 27.5-29

The oil level of a sealed cartridge is the basic height required during
assembly to properly purge the cartridge before closing it.It is measured between the top of the cartridge and the oil level.

The oil level of an open cartridge is measured with the stanchion
depressed and the rod extended to its maximum. It is measured between the
top of the stanchion and the oil level.