The swissstop racepro 2011 yellow king brake blocks provide unbeatable braking in both wet and dry conditions designed to not damage your rims the blocks offer silent operation and are compatible with all rim materials providing consistent braking from 20c to 40c they give fantastic power and modulation lm features swissstop racepro 2011 yellow king brake blocks provide unbeatable braking in all conditions wont damage your rims compatible with all rim materials consistent br