Mtb srs carbon ground sole super lightweight without sacrificing power or durability a medium modulus carbon sole with replaceable tread blocks in the toe and heel the mtb srs carbon ground sole features innovative replaceable mtb plate designed to prevent wearing in the pedal contact area toe spike compatible in case you need the extra traction the mtb srs carbon ground soles plate is replaceable to ensure consistent protection for your shoe techno 3 push system the dials of sidis tech