Fizik Transiro Hydra Aeroweave Carbon - White/Red/Blue - 44.5
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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.
SPECIFICATIONS
- Aeroweave upper: an enveloping and extremely breathable net-like upper structure
- R2 outsole: full carbon unidirectional Stiffness index 10
- Weight: 225g*
- Sizes: 36-48 (37 to 47 also in half sizes)
TRANSIRO
Triathlon series, designed for uncompromised cycling performance and efficient transitions
*the weight value, referred to ½ pair and without footbed, is to be considered within the tolerance range of +/-3% on a metric system scale. The footbed weight is approx. 20g.
- Brand
- Fizik
- Category
- Shoes
- Shoe type
- Platform
- UK size
- 10
- EU size
- 44.5
- SKU
- TRR2PAR1K20RB445
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Fizik shoes
Fit tip If you measure between two lengths or like a little extra room for thick socks, go up to the next size.
How to measure
Stand on a sheet of paper with your heel against a wall, mark the tip of your longest toe and measure from the wall to the mark in mm. Do both feet and use the longer one. Find that length in the table and take the EU size shown; Fizik shoes are sized in EU, so this is the number to order. If you measure between two lengths or like a little extra room for thick socks, go up to the next size. Road shoes should hold the heel firmly with the toes just clear of the end.
Find my size
Enter what you can measure; we'll match it to the table.
Shoes
| EU | UK | US | Foot length (mm) |
|---|---|---|---|
| 36 | 3.25 | 4.25 | 230 |
| 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 | 7.5 | 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 | 10 | 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 | 12 | 297 |
| 46.5 | 11.5 | 12.5 | 300 |
| 47 | 12 | 13 | 303.5 |
| 48 | 12.75 | 13.75 | 310 |
Applies to all Fizik shoes. UK and US sizes are shown as decimals where the manufacturer uses quarter and three-quarter fractions (for example 4.25 for 4 1/4). Wide-fit models use the same length sizing with extra room across the forefoot.
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Fizik shoes
Fit tip If you measure between two lengths or like a little extra room for thick socks, go up to the next size.
How to measure
Stand on a sheet of paper with your heel against a wall, mark the tip of your longest toe and measure from the wall to the mark in mm. Do both feet and use the longer one. Find that length in the table and take the EU size shown; Fizik shoes are sized in EU, so this is the number to order. If you measure between two lengths or like a little extra room for thick socks, go up to the next size. Road shoes should hold the heel firmly with the toes just clear of the end.
Find my size
Enter what you can measure; we'll match it to the table.
Shoes
| EU | UK | US | Foot length (mm) |
|---|---|---|---|
| 36 | 3.25 | 4.25 | 230 |
| 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 | 7.5 | 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 | 10 | 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 | 12 | 297 |
| 46.5 | 11.5 | 12.5 | 300 |
| 47 | 12 | 13 | 303.5 |
| 48 | 12.75 | 13.75 | 310 |
Applies to all Fizik shoes. UK and US sizes are shown as decimals where the manufacturer uses quarter and three-quarter fractions (for example 4.25 for 4 1/4). Wide-fit models use the same length sizing with extra room across the forefoot.
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