Challenge Grinder TLR 650b vulcanized tire

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.

For a perfect tubeless setup use Challenge Smart Sealant !


Features

  • Use: Hardpack, Gravel, Sand, Loose, Rocky
  • Proprieties 1.7-2.5 bar
  • Safety limit: 400 Kpa
  • Series: Race
  • Size: 650
  • Width: 46mm
  • Casing: Nylon Superlight
  • TPI: 120
  • Tube: Vulcanized TLR
  • Bead type: Aramid


Technologies

Vulcanized Tubeless Ready (V-TLR)

The highest level of performance offered by car, truck and motorcycle tire manufacturers is a vulcanized tubeless system. While this is an old technology for cars and trucks, for bicycles it is relatively new and did not even have an internationally accepted design standard (ISO or ETRTO) until this year.
By eliminating the inner tube it is possible to lower the weight and theoretically create a softer, more comfortable, more efficient, lower rolling resistance tire system by running lower tire pressure. The reality is a little different as extra rubber needed to seal the air lower pressures tends to defeat the concept of “high performance” tubeless.
A tubeless system has a super tight fit on the rim to maintain the seal and can be run without sealant. Most tubeless tires are actually tubeless ready (TLR), able to run tubeless by adding a sealant but also able to be run with an inner tube when assembled and sold to make test rides and a quick sale possible. Regardless of which tubeless system is used, two concerns arise:
A tubeless system requires more maintenance than a system with an inner tube. This is not a big problem in a car or truck or motorcycle that you take to a shop for service, but can be a big problem for cyclists out on the road or trail,
It is still impossible to make a tubeless system perform like a handmade tubular system. This is why top pros in every bicycle segment still use tubulars.
Challenge started introducing Vulcanized Tubeless Ready (V-TR) tires this year because the ISO and ETRTO standards for proper V-TR tire and rim fit have finally been completed. These standards ensure your safety and your ability to fit and service the tires with hand tools.

Handmade Tubeless Tubular (H-TLTU)

All Challenge Gravel treads now offer this unique H-TLTU system that maintains all the performance benefits of the best handmade tubulars. A latex liner is fused to the casing, replacing the traditional inner tube, allowing for the use of a plug to finish a ride or race in case of a puncture too large for the sealant to fix.