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Stan's NoTubes
ZTR Grail Comp - Disc

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Durable, efficient, comfortable, and flat resistant.

Built along the same lines as the ZTR Grail Team, the Stan's NoTubes ZTR Grail Comp Disc wheels combine the plush efficiency of wide rim wheels with the functional benefits and flat resistance of tubeless technology. A few different specs like heavier spokes — that there are more of — and chrome bearings instead of stainless steel make these wheels a claimed 95 grams heavier than the Grail Team wheels and produce a higher suggested rider weight limit, up 40 pounds to 250. Other than that, they are virtually the same as their more expensive brother, making the ZTR Grail Comp wheels a bombproof choice for someone looking for a durable, disc brake wheelset.


One of the key features of the ZTR Grail Comp wheels is the Bead Socket Technology (BST). BST makes for a shallower seating area, which in turn seats the tire's bead directly below the rim's lip to create a seal far tighter than conventional rims allow. By pressing the bead to the rim, it also frees the extra tire surface that would be trapped under a conventional rim's sides, allowing for greater volume, which in turn translates to less rolling resistance, more confident cornering, and the option to run a lower PSI for a more comfortable ride. For anyone keeping score at home, that's improved comfort, efficiency, and control. This also results in less rotational mass that you have to turn over with the cranks.


The center channel shape, combined with the BST, establishes a firm seat for the tire and makes for a better seal. The overall design of the ZTR Grail Comps means they're compatible with most mass-market tires. The proprietary NoTubes Sealant is the key element to this adaptability. The sealant is liquid while it's inside the tire, but it dives into gaps and punctures nearly instantly to create a seal with the rim or in a breach caused by a goat head. The addition of the sealant and the subtraction of tubes mean fewer flats — a feature that sells itself to anyone who has been left fumbling with tire wrenches on the side of a highway in a rainstorm.


At a robust 24 millimeters wide with a 20 millimeter internal width, the ZTR Grail Comp is at the forefront of the wide-rim revolution. Wider rims further complement the tire volume gains made by BST, and net a corresponding increase in both comfort and speed. The ZTR Grail rims are also 24 millimeters deep, making them the most aerodynamically gifted rims in the NoTubes family.


The 32 spokes per wheel result in more grams than the Grail Team but with a much higher rider weight limit and even more durability. They're laced to Stan's NoTubes' 3.30 Disc hubs, which feature chrome bearings, which resist wear more than softer stainless steel bearings. The downside to chrome is its vulnerability to the elements, but, since they're protected inside of the hub, that won't be an issue except under extreme circumstances. (Read: your bike is submerged completely for several hours.) The spoke bed's wall thickness is variable, which increases durability and consistency in spoke tension.


The Stan's NoTubes ZTR Grail Comp Disc wheels are available with Shimano/SRAM 8, 9, 10, and 11-speed compatibility. Please note that ZTR Grails don't include a cassette lockring. Stan's suggests a rider weight limit of 250 pounds.


Details

  • Tubeless ready
  • Disc brake compatible
  • 24mm rim width
  • 32 spokes per wheel
  • Chrome hub bearings
  • Item #SNT000M
Rim Material
6061 aluminum
Rim Depth
24 mm
Rim Width
external 24 mm, internal 20 mm
Brake Compatibility
disc
Hubs
Stan's 3.30
Skewers
quick-release
Spokes
Black 2.0/1.7/1.8mm
Claimed Weight
[complete set] 1720 g
Recommended Use
cycling, gravel, cyclocross
Manufacturer Warranty
1 year

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