I use these supermoto soles on my brand new Sidi Crossfire 2 boots so I don't wear them out on the Tarmac. They do their job as they should. Three problems I came across were: Had to poke holes through the lock screw locations. They are a little difficult and time consuming to fit. There needs to be more slider area at the front edges of the boots as I have worn that section down.
Kano the sumo racer