Verified purchaser
Product Details
Transiro Hydra Aeroweave Carbon Triathlon Cycle Shoes
Transiro Hydra Aeroweave is a pure triathlon racing shoe that combines an innovative second-generation Aeroweave upper with a stiff carbon outsole for efficient pedalling and faster, worry-free transitions.
Faster Tri Transitions
As transitions become increasingly important— now considered the fourth discipline in any triathlon event, be that a full Ironman race or sprint distance—we have redesigned our tri-shoe range to meet the requirements of the most demanding athletes.
Transiro Hydra is built with a single Velcro strap to allow faster, worry-free transitions, where any mistake can cost decisive time. Additionally, the enveloping strap provides the strong foot support athletes need to be efficient in every race situation.
Softer, Breathable Support
The Aeroweave upper ensures maximum breathability. Now in its second generation, Aeroweave woven fabric interlaces nylon fibres with filaments of thermoplastic polymers for an even lighter shoe that doesn’t lose its original tenacity, providing the strength and support required in competition. The new upper is also softer, which makes it the perfect companion for those who prefer to approach the biking segment sockless.
Powering Pedals
At the base, the R2 outsole’s engineered carbon fibre layup saves weight and delivers increased stiffness, with a stiffness index rating of 10, making this outsole the most responsive in the fizik range. A wide vent inlet and deep internal channelling provide cooling airflow to aid in temperature regulation.
The cleat positioning is set slightly further back compared to traditional settings to optimize pedalling efficiency and reduce knee compression—especially well-suited for very aggressive, forward aero positions typically adopted by triathletes.
Pedal Compatibility
These shoes are compatible with road pedal systems utilising the 3-bolt cleat system such as Shimano SPD SL, Look Keo/Blade, Time Atac etc...
Features
- Aeroweave upper: an enveloping and extremely breathable net-like upper structure
- R2 outsole: full carbon unidirectional
- Stiffness index 10
- Compatible with 3-bolt cleats and clipless road cycling pedal systems
- Cleats not supplied
- Manufacturer’s claimed weight: 225g
Specifications
- Shoe Size System (Footwear)
- EU
- Closure Type
- velcro
- Family
- Transiro
- Gender
- Unisex
- Intended Use (Footwear)
- Road Cycling
- Primary Material (Upper)
- Synthetic
- Weight (grams)
- 225 g
- Width / Fit
- regular-standard
- Breathability Rating
- High
- Materials (Detailed)
- upper-mesh
- Outsole Type
- Carbon
- Thermal Insulation / Temperature Rating
- Not insulated
- Product code
- 1784882 / 54294676865370
Size Guide
| EU | UK | USA | Foot Length (mm) |
|---|---|---|---|
| 36 | 3.25 | 4.25 | 230 |
| 36.5 | 3.75 | 4.75 | 233.5 |
| 37 | 4.25 | 5.25 | 237 |
| 37.5 | 4.5 | 5.5 | 240 |
| 38 | 5 | 6 | 243.5 |
| 38.5 | 5.25 | 6.25 | 247 |
| 39 | 5.75 | 6.75 | 250 |
| 39.5 | 6 | 7 | 253.5 |
| 40 | 6.5 | 7.5 | 257 |
| 40.5 | 7 | 8 | 260 |
| 41 | 7.25 | 8.25 | 263.5 |
| 41.5 | 7.75 | 8.75 | 267 |
| 42 | 8 | 9 | 270 |
| 42.5 | 8.5 | 9.5 | 273.5 |
| 43 | 8.75 | 9.75 | 277 |
| 43.5 | 9.25 | 10.25 | 280 |
| 44 | 9.75 | 10.75 | 283.5 |
| 44.5 | 10 | 11 | 287 |
| 45 | 10.5 | 11.5 | 290 |
| 45.5 | 10.75 | 11.75 | 293.5 |
| 46 | 11.25 | 12.5 | 300 |
| 47 | 12 | 13 | 303.5 |
| 48 | 12.75 | 13.75 | 310 |
Sizing note: Fizik shoes are built with a performance fit: true to size in length but with a narrow, low-volume toe box. Do not size up — it won't solve a width issue. If you have a wider or higher-volume foot, choose the Wide Fit version. If you're unsure whether Fizik suits your foot shape, check our size and fit guide before ordering.
Accurate sizing guidance can be gained by measuring the length of your feet from the back of the heels to the tip of the big toe. This measurement corresponds to the "Foot Length" column in our size chart.
Reviews
5
Verified purchaser
Shipping & Returns
Free UK delivery on orders over £50. Orders are dispatched within 1-2 working days and typically arrive 1-2 working days later.
Return unused items in their original packaging within 30 days of delivery. Return postage is £3.50.
Q & A
Be the first to ask a question about this product.
About Fizik
Where the rider meets the bike.
Fizik was founded in Northern Italy with the conviction that the three points of contact between rider and bike — saddle, shoes, handlebar tape — deserve the same engineering focus as the bike itself. Every product is engineered around the rider's body to make the long ride feel shorter.
Fizik's saddle range is organised around the Spine Concept — Bull, Chameleon, Snake — matching saddle shape to rider flexibility. The result is a comfort claim backed by anatomy rather than marketing.
