Giro Cylinder II clipless mountain bike shoes review
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Cost
★★★★☆
Performance
★★★★☆
Overall Score
★★★★☆
Overall Score ★★★★☆
Verdict: Designed for cross-country, cyclocross, gravel and general trail riding (and works great on bikepacking expeditions), the Giro Cylinder II is a lightweight, clipless mountain bike shoe that’s really got us excited for the price, looks and functionality!
Built around the SPD two-bolt interface, it offers reliable power transfer while keeping weight to a minimum, coming in at around 315 grams per shoe in size EU 42, making it one of Giro’s lighter mid-range offerings. The upper is made from a breathable synthetic mesh with reinforced microfibre around the toe and heel, providing ventilation and some durability, though water resistance is limited and they can soak through quickly in wet conditions.
Fit is handled by a Boa L6 dial, which allows 1 mm micro-adjustments and a quick release, paired with a Velcro strap over the forefoot for added security. The toe box is fairly roomy, offering comfort for wider feet, though the midfoot and heel area run on the narrower side, which may not suit all foot shapes. The heel cup offers reasonable hold, though some riders have found it lacking in very steep or hike-a-bike situations. Inside, the flat die-cut insole provides minimal arch support, which could be an issue for riders needing more structured footbeds.
The sole uses a co-moulded nylon plate with a rubber lugged outsole, designed to balance pedalling stiffness with walking grip. Optional metal toe spikes can be fitted for muddy cyclocross or winter conditions. On the bike, stiffness is sufficient for XC-style riding, transferring power efficiently without feeling overly harsh. Off the bike, traction is good on rocky or muddy terrain, but the relatively soft rubber can wear quickly if the shoes are used for frequent walking or paired with aggressive flat pedals.
Performance reviews are largely positive, with many riders praising the lightweight feel, breathability and the quick, precise closure of the Boa system. They are considered a versatile choice for summer trail riding, XC racing, gravel adventures and even commuting. However, there are common criticisms: the mesh upper offers little weather protection, the narrow fit and thin insole can compromise long-ride comfort, and durability, particularly of the outsole, is sometimes disappointing. Some riders have reported premature wear or even cracking noises from the Boa under heavy load, though these are not universal complaints.
Overall, the Giro Cylinder II strikes a solid balance between weight, comfort and price, sitting around the €130 / £120 / $150 mark. It is well suited for riders who value breathability, low weight and quick adjustability over rugged protection or all-weather capability. For fast XC loops, gravel rides or general dry-weather use, it delivers reliable clipless performance without breaking the bank. Riders tackling rough, wet or hike-heavy terrain, or those needing more structured support, may prefer a stiffer, more protective alternative, but for many, the Cylinder II offers an excellent mid-range option that punches above its weight.
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