Pirelli Scorpion Trail H Mountain Tire 29x2.60 Folding Tubeless Ready SmartGRIP ProWALL 60TPI BlackPirelli Scorpion Trail H Tire 29 x 2. 6 Tubeless Folding Black. The Scorpion Trail H is the best choice when trails are hard and speed is the key factor. A low profile and compact tread spacing is suited for riding quickly and confidently over any type of hardpack terrain. SmartGRIP Compound: Long lasting grip in both wet & dry conditions with increased resistance to tearing Multi ply 60tpi Nylon for improved reliability and handing performance