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.