Triathlon Shoes
Used triathlon shoes turn up on Cranxs from private sellers across the UK, listed alongside new stock. They are built around fast transitions: a wide opening, a single strap you can pull shut one-handed, a heel loop for dragging them on, and drainage ports for feet still wet from the swim. Buying second-hand is the cheapest route into a race-specific shoe you may only wear a handful of times a year.
What makes a triathlon shoe different from a road shoe?
Tri shoes are designed to be put on wet, in a hurry, with nobody holding the bike. Instead of the two or three ratchets or dials on a road cycling shoe, you get a single wide strap that closes with one hand, usually pulling outwards so it does not catch the crank. The opening is cut wide, there is a loop at the heel so you can haul the shoe on, and drainage ports let water out rather than trapping it. Linings are smooth and largely seam-free, because these shoes are meant to be worn without socks.
Which cleats do they take?
Almost all triathlon shoes use the three-bolt road drilling, so Look Keo and Shimano SPD-SL cleats bolt straight on. Check the sole photos before buying if you ride two-bolt SPD or a four-bolt Speedplay system, as not every sole carries the extra holes or comes with the adaptor plate. Ask whether the bolts and washers are included too, as they are easy for a seller to mislay and irritating to source on their own.
What should I check buying used?
Look at the strap first: velcro loses its grip long before the rest of the shoe wears out, and a strap that will not hold is the part you cannot easily replace. Then check the heel loop stitching, which takes a hard yank every transition, and the sole around the cleat bolts for cracks or stripped threads. Sockless use means odour and a flattened insole are common, and both are fixable; a delaminating sole is not.
What size should I buy second-hand?
Size for bare feet rather than feet in socks, and allow for how much they swell over a long bike leg. Sizing runs differently between brands, so a stated EU size is a starting point rather than a guarantee. Ask the seller for the insole length in millimetres and compare it against a shoe you already own. A slightly roomy tri shoe tends to be more forgiving than a tight one, because the single strap has a wide range of adjustment.
Do I still need socks or covers?
Racing sockless is the whole point of the design, and most riders leave the shoes clipped into the pedals with elastic bands and slide their feet in after the mount line. For cold training rides the same shoes work with thin socks, and a pair of shoe covers pulls over the top, though the drainage ports mean they will never be as warm as a closed winter shoe.