Quarq DFOUR Dub Rennrad Powermeter

This Quarq DFOUR Dub Powermeter Spider is stable, light, and compatible with Shimano chainrings (among others). This spider can be mounted on all Sram and Quarq crank arms where the spider must be mounted with 8 bolts.

Stable measuring thanks to ten years of experience
This power meter incorporates ten years of experience from Quarq. This means that the chance of malfunctions is further reduced and that the power meter gives strong, stable and reliable measurements. This power meter has features such as Quarq MagicZero technology, with which it calibrates itself while you are cycling. The meter also adjusts automatically to changing temperatures, so that you always have reliable data. This means that the power meter has a deviation of only 1.5%.
The power meter is also resistant to weather influences and has a waterproof rating of IPX7.

Compatible with Shimano chainrings
This Quarq DFOUR Dub Powermeter is designed to match with Dura-Ace R9100 chainrings. However, you can also use it together with Ultegra R8000 and 105 R7000 chainrings, but these will not quite match in terms of colour and shape.