The Donor Hose is an air hose designed to transfer or 'donate' air pressure from an inflated tire to a flat or low tire.
Using the Donor Hose you can transfer enough air from one tire to another so that you can limp back to civilization. It's always better to ride to the nearest service station on two half-inflated tires than to push it home on one fully inflated tire, or to call a service truck.
The Donor Hose is also useful for seating beads on tubeless tires. The rapid transfer of air from a fully charged tire will seat the bead on the tubeless tire.
If you have a Cycle Pump you can overfill the donor tire and this gives you several chances to achieve a properly seated tire bead. Once the bead is seated, use the Cycle Pump to fully inflate the tire.
The Donor Hose is 1.5m long air hose with brass air chucks on both ends. The hose has a braided exterior for strength and durability. The braid may have minor manufacturing defects (occasional errant threads) but this is only a cosmetic blemish and does not affect performance or function.
Here's a tip we learned the hard way - if you're miles from town and you need a siphon hose to transfer gas, you can cut off the air chucks and the Donor Hose will serve as an emergency fuel transfer system (It sure beats walking 19 kilometers to the next fuel stop). If you don't want to cut off the chucks, they can be unscrewed in the middle (removing the locking chuck and leaving the brass fitting) and you can still siphon past the fittings.
Effective October 2013, the brass air chucks have been replaced with a flip-lever locking air chuck. Does the same thing, just a different fitting.
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