The SRM Wireless Powermeter Gossamer (8 strain gauges) has an accuracy of ±2%.
The FSA Wireless PowerMeter takes a 130mmBCD large chain ring and a 110mmBCD small chain ring. It can be set up with standard (53/39) or compact (50/34) chain rings which can be changed later.

Includes:

• SRM Wireless PowerMeter
• Cranks (FSA)
• Chainrings (FSA)
• FSA MegaEXO BB-6000 (102g)