I have to agree with the Quarq recommendation, they own the patent for shear design, used by many other companies, even SRM.
For those that prefer to read: Are all Powermeter Spiders just Quarqs – Titan Lab
I have to agree with the Quarq recommendation, they own the patent for shear design, used by many other companies, even SRM.
For those that prefer to read: Are all Powermeter Spiders just Quarqs – Titan Lab