CHALLENGE Grinder Pro 700x33 Folding Gravel TyreMaster any terrain with the CHALLENGE Grinder Pro 700x33 gravel tyre, the ultimate all-round choice for riders who refuse to be limited by the surface. Engineered for versatility and speed, the Grinder Pro is your trusted partner for adventures that seamlessly transition from smooth tarmac to challenging off-road trails. Whether you´re tackling a competitive gravel race, exploring backcountry fire roads, or embarking on a long-distance bikepacking journey, this tyre delivers the performance and confidence you need to push your limits.The genius of the Grinder Pro lies in its intelligently designed tread pattern. It features a high-rolling diamond-shaped tread in the center, meticulously crafted to minimize rolling resistance on hardpack, gravel, and pavement. This allows you to maintain impressive speed and efficiency on the faster sections of your ride. When conditions change, the tyre´s true versatility shines. Aggressive, taller external protrusions on the shoulders of the tyre come into play when the road becomes soft, muddy, or requires greater grip. These side knobs bite into loose surfaces, providing exceptional cornering stability and braking control, ensuring you remain in command when traction is paramount.At the heart of the Grinder Pro´s superior ride quality is its premium SuperPoly casing, constructed with an incredibly high thread count of 260 TPI. This supple and flexible construction allows the tyre to conform perfectly to the imperfections of the ground, delivering an exceptionally smooth and comfortable ride while maximizing traction. This handmade quality significantly reduces vibration and rider fatigue, all while lowering rolling resistance for a faster, more efficient performance. As a folding clincher tyre, it is lightweight, easy to install on standard 28´´- 700 rims, and convenient to carry as a spare. Specifically designed for Gravel cycling, it is the definitive tyre for the rider demanding speed without sacrificing grip.High-rolling diamond-shaped tread for gravel bikes, with external protrusions that come into play when the road becomes soft, muddy or requires greater grip.FEATURES:-Material:- SuperPoly.Measure:- 28 / 33TPI:- 260:- Discipline:- Gravel.Technical Specifications:* Brand: CHALLENGE* Model: Grinder Pro* Discipline: Gravel cycling* Size: 28´´- 700x33* ETRTO: 33 - 622* Type: Clincher* Bead: Folding* Casing Material: SuperPoly* TPI (Threads Per Inch): 260* Tread: Fast-rolling diamond center with aggressive shoulder knobs for cornering grip* Use: All-conditions gravel, from hardpack and pavement to soft or muddy trails