Hydration Packs
Browse used hydration packs for sale from riders across the UK. A hydration pack is a rucksack or vest built around a flexible bladder of 1.5 to 3 litres with a hose routed over the shoulder, and this category covers full packs, bladder-only spares and the harnesses and hip belts that go with them. It suits mountain bikers and long-distance riders who need water plus tools where bottles alone will not do.
What size hydration pack do I need?
Capacity is quoted as two numbers: bladder volume and cargo volume. A 1.5-litre bladder in a 3 to 6 litre pack covers a two-hour ride with a tube and multitool; 2 to 3 litres of water and 12 to 20 litres of cargo suits a full day, a waterproof and a spare layer. Enduro packs such as the Evoc FR Trail add a back protector and pad the pack out considerably. Vest-style packs sit tighter to the body with the load carried on the chest and shoulders rather than the lumbar region, which most riders prefer for anything fast and rough.
Hydration pack or bottles and a hip pack?
Bottles in frame cages weigh nothing on your back and are quicker to refill, but a full-suspension frame often has room for only one, and drinking means taking a hand off the bars. A pack carries three times the water and keeps your tools with you when you swap bikes. If you want the storage without the sweaty back, a hip pack or a small saddle bag from bags and panniers paired with two bottles does the same job for shorter rides.
What wears out on a used hydration pack?
The bladder is the part that fails. Check the inside for black mould in the corners and along the fill-port seal, sniff the hose, and look at the bite valve for splits in the silicone and for teeth marks that stop it sealing. Squeeze a filled bladder over a sink to find pinholes along the welded seams. On the pack itself, check the sternum strap buckle and the hip-belt clip, which crack with age, and check the shoulder-strap foam has not compressed to nothing. Replacement bladders and bite valves are cheap and widely available, so a good pack with a tired bladder is still worth buying — a pack with a delaminated back panel or a broken buckle is not.
How much should a used hydration pack cost?
Half of new is a fair price for a clean pack with a bladder that holds water and no mould. Knock more off if the bladder is stained or the hose smells, and treat those as bladder-less packs when working out the price. Buy new if you need a pack with an integrated back protector, since the foam's protective rating degrades after impacts you cannot see and a seller may not know the pack has been crashed in. Riders often sell a pack when they switch to bottles and a hip pack, so lightly used examples turn up regularly across the bike accessories listings.