It will work well on most bikes mine sadly has a wheel spindle that is too thick to allow this tool to access the cassette.
Health plus FOS Prebiotic Digestive Health Supplement - 200G
16 Aug, 2024
Probably "snake oil"
Well I've taking it for a while now and haven't noticed any changes to any part of my associated digestive processes. The theory and the write up don't match the reality.