SIDI Wire 2S Road Cycling Shoes Review 2026
What to Look For
Cycling shoes sit below your race-day tri suit and helmet on most triathletes’ upgrade lists, but a stiff, well-ventilated, properly fitting shoe matters over an Olympic-distance or 70.3 bike leg just as much as it does for a dedicated roadie. SIDI’s Wire 2S sits in the second tier of the brand’s road lineup, below the range-topping Shot 2S, and is aimed at riders who want race-level stiffness and support without the very top price bracket.
Key Features
- Firmor lateral support system — A structural element built into the sole and upper designed to keep your foot stable under hard pedalling loads, reducing the foot roll that causes hot spots on long rides.
- Dual-rotor closure — Two micro-adjustable dials let you tune tension separately across the forefoot and midfoot, rather than one dial cinching the whole shoe evenly.
- Ventilated carbon sole — A stiff carbon sole with ventilation channels, balancing power transfer against overheating on long, warm-weather rides.
- Adjustable Heel Retention Device — A wind-in heel cup that locks your foot in place once tightened; reviewers note the fit only comes together properly once this is dialled in.
- Weight — Around 674g per pair in a EU45.5, competitive for the category rather than class-leading.
Our Verdict
The Wire 2S is an evolutionary update rather than a reinvention — SIDI has mostly refreshed the styling and stripped back branding rather than changing the core shoe. That’s a compliment more than a criticism: independent reviewers have found construction, ventilation and fit all genuinely strong, with no discomfort reported through extended testing once the Heel Retention Device is properly wound in. Half sizes carry slightly more fabric in the upper than the equivalent whole size, which is worth knowing if you have a wider or taller foot and are choosing between a 44 and a 44.5. This is a shoe for triathletes who want race-ready stiffness and a genuinely secure fit for long-course riding, rather than the outright lightest option on the market.
Priced at £399.00 on Tredz.
Buying Tips
- If you’re between sizes, check whether SIDI’s half-size option better suits a wider or taller foot before defaulting to the smaller whole size.
- Wind the Heel Retention Device in gradually over your first few rides — the fit is designed around this being properly tightened, not left loose.
- Break the shoes in over several shorter rides before racing in them — a new stiff sole and dual-rotor closure both need time to settle to your foot shape.
Care and Maintenance
Rinse the sole and closure dials after wet or muddy rides — grit inside a rotor dial mechanism will eventually make it harder to turn smoothly. Let the shoes air dry away from direct heat rather than on a radiator, which can warp the carbon sole bonding over time. Check cleat bolts periodically, as the ventilated sole design means slightly less material around the mounting points than a fully solid sole.
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