Bontrager R4 Road Tire

TPI stands for Threads Per Inch. A 320 TPI casing is very high density, which makes the tire significantly more supple and flexible than standard tires, allowing it to conform better to the road surface for a smoother, more tubular-like ride feel.

While the R4 320 is optimized for high-speed racing and criteriums, its Hard-Case Lite puncture protection makes it durable enough for spirited training rides. However, if you prioritize longevity over performance, you might consider a more robust, heavier-duty tire for daily commuting.

This is a standard clincher tire, so it is compatible with any standard 700c road bike inner tube. It is not designed for tubeless setups.

The chamfer reinforcement layer is specifically designed to protect the sidewall from cuts and abrasions. This adds a layer of durability without compromising the tire's lightweight feel or suppleness.

The R4 320 is engineered specifically for smooth road and criterium racing. It is not intended for gravel or rough terrain, where its lightweight construction would be more susceptible to damage.