Puncture protection and mileage are the strengths of Hardshell-Protection. A wider PolyX Breaker, the specialist against punctures under the tread center and shoulders provides for great reliability. The three ply - each layer with 60 TPI - carcass covers the entire tire and makes it a real bastion against urban detritus. The outer sidewalls of the tyre are reinforced with DuraSkin fabric providing even more reliability due to the casing being so well protected. Hardshell tires are the puncture-resistant flagship amongst racing tires - produced exclusively in Germany.