These boots have the same basic overall fit as the Sidi Vertebra/Strada products, so if you’ve had fit experience with those, you’ll be fine with the ST boots of the same size. The calf adjustment capability on these boots is very effective and has a WIDE adjustment range, so if you have big calves, this is your boot! Sidi says they can accommodate up to a 15 inch calf. Visit our Sidi Sizing Information page for complete size conversion info (ladies can use the chart at the bottom of the page). We feel the chart works well to choose a size based upon a US shoe size. We estimate the width of these boots to be “medium” or “D” width.
Sidi ST Boots
Replaceable Shin Plate:
- Shin plate are easily replaceable trough screw.
Replaceable ST10 Buckle and Strap:
- This closure system adjust to the leg circumference on both sides therefore increasing the opening of the boot for ease of putting on
Ankle Support Brace and Air Ventilation System:
- The two nylon braces join the ankle joint with two screws that are hidden by a nylon cap. This system supports the ankle and is reinforced with fiberglass and is easy to replace. This system allows excellent flex movement front-to-back while being firm side to side. On the outer lower part of the boot an air intake is fitted which can be operated by an aerodynamic shaped button.
Zip Elastic Panel:
- Sidi has added a small elastic panel to aid in a smooth zipper operation as it allows a bit of movement via the elastic as the zipper passes over the rider’s ankle ball.
Replaceable Slider:
- The slider is replaceable and available in full nylon, with ceramic or with aluminum inserts.
Shock Absorbing Heel Cup:
- A polyurethane shell holds a shock absorbing insert, visible from the outside through small slits that mark out the look of the heel. The shell is mobile as it is fixed to the boot by two screws that allow 3 mm of impact movement.
Top Sole:
- Rubber top sole