The foam material of our racingfilters have a much more open structure compared to the roadfilters foam material which makes the duration of the maintainance much shorter , the protection is at the same level as our roadbike filters but for a shorter time , therefore the maintainance is much more intensive. Maintainance frequency for racebike filters are afther every two raceweekends. Therefore are racebike filters are NOT suiteable for roadbikes.