The efficient yet flexible Aertis MTB shoes, with optional stud upgrade, will make riding easier on days when added grip is needed. With their walking comfort and stability, these supportive adventure shoes can also handle off-bike sections of your route.The light nylon MTB SR17 soles, with special MTB inserts and a rubberised Sidi logo, will hold slippery surfaces efficiently, then disperse mud adeptly, to preserve the non-slip nature of the inserts and the power of your stroke. The toe inserts can be replaced with studs, purchased separately, on particularly slick terrains.The shoes are reinforced at the toe, in case of pedal strike, and laterally by the Firmore Closure system, a sturdy strap that runs from the shoe's centre to the lateral edge of the sole. The Politex upper, too, offers support while you ride and is tough and abrasion resistant.Finally, a great fit is ensured by Sidi's renowned Tecno 3 closure system, which ergonomically and accurately cinches the shoe over its leng