Pena Anti-puncture chain

The idea is simple: extract the nail, piece of glass or flint before it has time to sink into the tire.
For this, a chain rubs continuously on the tread, ridding it of all perforating bodies. No more need to cut your hands to clean your tires.
At the beginning of the 20th century, this system was used on automobiles, as roads were often not paved and horseshoe nails were very present.

Fixing on the fork head bolt and on the spacer of the rear stays, between the brake caliper and the frame.

Do not use on studded tires.
Sold individually