Make your mark on the gravel scene with the Gravel Grinder.

This tire combines a fast rolling diamond center with aggressive shoulder knobs that only hook-up when the terrain gets soft, muddy, or a bit sketchy.

Use HARDPACK, GRAVEL, SAND, LOOSE, ROCKY.

Properties WEIGHT: 402g, PRESSURE: 2 - 3.5 BAR, SAFETY LIMIT: 600 KPA

As gravel and adventure riding surge in popularity within the cycling community, the options for tire tread and volume have expanded exponentially. Among these choices, Challenge tires stand out as a premium selection for those seeking top-notch cyclocross or gravel performance. Drawing inspiration from its Chicane cyclocross tire, Challenge introduced the Gravel Grinder, featuring a borrowed tread pattern now available in larger volumes. With the introduction of the Gravel Grinder Pro Series, equipped with a supple 260 TPI handmade casing and tubeless-ready (TLR) design, Challenge reinforces its position as a leader in fast-rolling tires capable of maximizing traction on rough terrain. This tire's shoulder knobs now offer enhanced grip, thanks to the lower pressure facilitated by its tubeless-ready (TLR) construction, making it ideal for competitive racing environments.

Crafted around a 260 TPI casing, the Gravel Grinder Pro Series TLR Tire caters to the demands of racing across the size spectrum from 33mm to 40mm. Its specially shaped tubeless rubber bead, featuring an aramid core, offers flexibility for straightforward installation without excessive stretching. Challenge maintains strict adherence to rim and tire interface standards, ensuring compatibility with both tubeless and tubed setups on rims sized according to ETRTO standards. By prioritizing safety and reliability, Challenge's conservative specifications guarantee optimal performance and longevity for your equipment.

The Gravel Grinder's design narrative is intricately woven into its tread pattern. The pointed diamond knob file tread at the center ensures exceptional speed, particularly as it wears down, while providing stability and straight-line traction on packed surfaces and small loose materials over hardpack. The distinct edge knobs, engineered for directional speed and grip during cornering on pavement or hardpack, exhibit the aggressiveness needed to excel in softer terrain. With the added flexibility of tubeless use, these knobs deliver heightened grip and traction, even in muddy conditions, enhancing the Gravel Grinder Pro Series' effectiveness and versatility for long-distance rides or events with variable terrain.

The tubeless bead seamlessly interfaces with rims featuring short-depth bead seats, such as those endorsed by Stan's NoTubes, and pairs well with ammonia-free sealants. Reinforcing the tire's supple casing, the PPS2 protection belt provides puncture resistance without compromising performance.

Features

• Tubeless ready gravel tire built for speed, grip- ideal for fast events
• Proven diamond knob file tread center and distinctive, confident edge tread
• Best suited for pavement, hardpack, dry and dusty, mixed conditions
• TLR: can be run tubeless or tubed on appropriately ETRTO sized rims
• Casing: 260 tpi handmade Super Poly Corraza Armor
• Casing offers abrasion protection on sidewall
• Aramid bead is strong and durable, holding seal and edge at lower pressures
• PPS2 puncture protection belt is highly effective, yet lightweight and supple to match the casing properties
• Sizes / Actual Weight / Pressure range:
  • 700x36 / 402g / 33-55
• Color: Black/Tan
• https://www.challengetires.com/warranty-instructions