If you're stopping with mineral oil activated hydraulic brakes, keep a 2oz bottle of Magura Blood handy in your home shop or travel repair kit. Its small size has enough juice for one bike, while keeping shelf space open or the portable toolbox uncluttered.

Magura Blood is a 10-weight mineral oil, unlike the 30-50 weight stuff found in drugstores which will make brakes sluggish and could lead to brake failure. If that doesn't put you off, the following small fact should: use of any other fluid besides Magura Blood will void your Magura warranty.