Spending a summer afternoon in the garage changing your brake cables and recharging your hydraulic fluid after a long ride can be an enjoyable maintenance ritual. Preparing your garage for when the occasion arises is easy with a spare set of cables and Shimano's Hydraulic Mineral Oil for Disc Brakes. The hydraulic mineral oil will refresh your Shimano brakes if your fluid becomes contaminated, and it comes with enough to use for multiple bikes, if needed.