Spiuk Altube Black / Red mtb shoes The Altube shoe has a competitive and dynamic character. Its design and construction, based on quality and attention to detail, convey security and refinement. Spiuk Altube Black / Red mtb shoes The BOA® closure ensures a comfortable and precise fit, thus achieving maximum performance with each pedal stroke. It is an excellent option for advanced cyclists. Thanks to its fiberglass and polyamide mixed construction sole, it achieves a better balance between comfort and performance with each pedal stroke.