Many service operations or repairs require the bike to stand on the centre stand, or even on the side stand. The potential for disaster, if the bike falls off the stand, is great, one wrong move is all that's needed. The brake holder makes sure that the front wheel stays put and prevents the bike from moving forwards. It is also recommended to use when transporting the bike in a van or a trailer, as it reduces the strain on the straps and helps to keep the bike from moving about.