I’ve been wanting some SRM’s for years and finally I purchased a some for more money than seems right for just a set of cranks. I didn’t purchase the head unit (saving £600) and intend to use with my Garmin 310XT. The model is the SRM Professional with 180mm (yes 180) cranks. Being 6ft 7 I’m probably one of a handful of people who needs or even would benefit from cranks this long.
Not the first time I’ve dabbled with crank options. Below is a see of Powercranks (which I still have in my shed – send me an email if you want to make me an offer for them!) I used for 6 months in 2004. Completely independent and an excellent way to strengthen hip flexors. I didn’t notice any improvements in my cycling but the benefits to running were significant.