The Topeak Pressure-Rite Presta Valve is a 90° adaptor and the perfect choice for valves with a difficult access like on small wheel sizes or time trial disc wheels. Ensures accurate pressure even during removal.
The adaptor screws on to the valve. You can also confirm in the PDF user guide in the following link:
Hi Andrew,
The Topeak Pressure-Rite Presta Valve is a 90° adaptor and the perfect choice for valves with a difficult access like on small wheel sizes or time trial disc wheels. Ensures accurate pressure even during removal.
The adaptor screws on to the valve. You can also confirm in the PDF user guide in the following link:
https://www.topeak.com/us/en/product/664-PRESSURE-RITE-PRESTA-VALVE-ADAPTER