Zapatillas MTB Sidi Aertis W

Discover boundless adventures with Sidi's Aertis W MTB shoes, where efficiency and flexibility come together with high comfort and stability, designed specifically for your cycling adventures.

Whether you are cycling or exploring nature on foot, the SR 17 sole delivers extraordinary performance. The non-slip plastic inserts, optionally expandable with studs, and even the rubberised SIDI logo ensure excellent grip even on the most challenging terrain. At the same time, they guarantee optimal power transfer to the pedals. With the FIRMORE CLOSURE System, you will enjoy excellent support, contributing to both comfort and stability.

Moreover, you can count on proven SIDI features, including the intuitive and high-precision adjustable TECNO-3 twist closure and the durable, lightweight POLITEX upper material.

Firmor Closure
For the driven athletes who strive for optimal power transfer with added value of excellent lateral support: Shoes equipped with this advanced closure system offer the perfect balance between lateral stability and an impeccable fit, resulting in a sense of security and wearing comfort that is outstanding.

Versatile SR 17 sole
This nylon sole features plastic inserts and a centrally placed SIDI rubber logo to give you the ultimate grip when on foot, while providing you with safety and efficiency when pedalling. The threaded inserts around the cleats are replaceable, and additional inserts are available for optional spikes, making this sole compatible with all common MTB pedal systems.

Politex material
An innovative material composed of multiple layers that combines the advantages of compacted PVC, textile and felt. The result is a material that resists impacts and tears, retains its shape, is colourfast and offers durability that will stand you in good stead for years to come.

TECNO 3 locking system
Designed for maximum comfort and ergonomics, the new TECNO 3 closure system extends the full length of the shoe and uses a nylon cable and twist closure for extremely precise adjustments, even while cycling. This system ensures a tight fit and closure.

Detailed explanation of sizing in mm
In order to help you, as best we can, to choose the right size shoe we have measured all the shoes ourselves. All that's left for you to do is measure your own foot length, and we'll tell you which shoe size per brand suits you best. Does your foot length in mm not appear on the relevant product's page? Then that particular shoe is not available in a size that suits your foot length.

You can easily measure your foot length using an A4 sheet of paper, placed on the floor against a wall. Stand with one foot on the piece of paper, with your heel against the wall. Draw a line above your big toe (or above the index toe if that is longer). Now mark your other foot on the paper in the same way. Measure both - the measurement of your longest foot is your foot length in mm's! Please note: some manufacturers have their own measuring system, and as a result what appears on the shoebox can deviate from what we have measured.

What shoe size you need can differ per brand. This is because certain brands wear larger or smaller. To help you get the perfect fit, we've also classified the shoes as narrow, average, or wide fit. Read all about it in our blog!