SIDI Tecno 4 Iron 230mm System Pair - Black CheckoutTitle=Cinelli Unicanitor Barry McGee Leather Saddle Generally do not spin as

Generally do not spin as smoothly as retainer bearings due to their maximum complement of ball bearings (MAX)

It will not adhere to curved surfaces or silicon

Ideal bicycle storage space for bike races gran fondos triathlons demo events and community cycling events

Thanks to full X-SYNC design

Fits Brand Marin Fits Brand Polygon

SIDI Tecno 4 Iron 230mm System Pair - Black CheckoutTitle=Cinelli Unicanitor Barry McGee Leather Saddle Generally do not spin asThe Tecno 4 Iron is a closure mechanism developed by SIDI for its high performance cycling shoes. It represents the latest evolution in SIDIs dial based systems offering enhanced ergonomics adjustability and durability. The Tecno 4 dial lifts away from the shoe tongue creating more space for the foot to slide in easily The rotor has been redesigned to be lighter and quicker to operate than previous Tecno systems The central mechanism balances tension