The XR4 Team Issue is Bontrager's answer to loose, rocky trails. It's perfect if you're looking for a lightweight, aggressive tire that rolls fast and grips hard. And, its cupped lateral blocks and long, buttressed shoulder knobs hold your line when you're stuffing it into corners at speed, while the supple 120 TPI casing boosts trail feel for enhanced traction.
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I have been through my share of tires and when I tried this one (Team Issue, 2.35, run at 28-31 lbs, depending on conditions) two years ago, I was impressed! Awesome grip, cornering, wear resistance and weight. Don't take my word-search for other reviews and you will find great ratings from Pinkbike, Bike Magazine, etc. You will not be disappointed.