Sidewalls: Gumwall(GW) and Skin Wall(SW)

The Gum Wall (GW): has a coating of rubber for strength and protection.

Advantage:
Helps resists pinches and sidewall abrasion/damage.

The Skin Wall (SW): is transparent and shows the texture and thread
of the casing.

Advantage:
Lightweight, flexibility, suppleness.

The SW casings are reinforced at the bead (protection against wear) by an HPRS* strip.
*HPRS: High Protect Rim System