With the fast growth of the gravel, endurance and road disc markets, the need for high performance, yet accessible, tubeless disc wheels has grown. This category is not just about cyclocross anymore. Stan's NoTubes has offered the Iron Cross and Grail series to such cyclists and the ZTR Grail Pro Disc Wheelset is race ready out of the box at 1639 grams. The NoTubes BST-R Tubeless Technology for road 25-40mm road tubeless tires, traditional road tires when used with tubes, and low-pressure tubeless cyclocross tires. With a 24.1mm external rim width (20.3mm internal), the Grail Pro Disc offers great versatility and tire compatibility, allowing you to use them on a road or gravel disc bike all year round or switch over to cross tires come the Fall.

The rims are the primo selling point for NoTubes, and the extruded 6061 aluminum 24.5 mm profile finished product is built into a flat, wide structure, with the short bead socket system that NoTubes designed for pressures up to 116 psi with a 23mm road tire, or a max of 45 psi with a 32mm road tire. Please keep in mind that a max rider weight of 190lbs is listed for this 24 spoke front, 28 spoke rear wheelset. As great as the rims are, the biggest improvements in NoTubes wheels has been the development of the adaptable and versatile NEO and NEO Ultimate hubsets. The latter is used here, as you'd expect on a Pro-level wheel. Set up for 15/100mm FT, 12/142mm RR thru-axle use, the wheels are shipped with slip-fit adapters for 100mm FT, 135mm RR quick release, and a 12/100mm option for the front as well.

Technically speaking the NEO Ultimate hubset features an oversized swaged alloy axle, oversized and widely spaced sealed cartridge bearings, high durometer seals, laser-etched SealLock end caps lock securely into place and keep out the elements while spinning smoothly. All of this carried in a CNC machined aluminum hub shell that eliminates all excess material, and reaches out to the rim with angled j-bend type flanges for improved spoke alignment and more consistent spoke tension. The front hub spins smoothly at all times, while the rear NEO Ultimate carries the 6-Pawl, asynchronus, 72-Point (5°) Ultimate freehub system for fast, smooth, and sure engagement at any speed within the forged steel 36t Ratchet Ring that sits inside the hub shell. The freehub body is replaceable and interchangeable so if you switch drivetrains you aren't locked out of this great wheelset.

Pulling the rim and hub together are the legendary Sapim CX-Ray black stainless steel spokes. This lightly bladed design can be consistently tensioned at a high level of force, will give under impact load to mitigate rim damage, and is very resilient to daily use. Sapim Secure Lock black alloy nipples provide highly reliable fastening. The 24 hole front wheel is laced 2x/2x, as is the 28 hole rear. Overall the wheels feel responsive, with excellent corning deflection and smooth fast acceleration, and the safe and reliable tire option versatility makes the NoTubes ZTR Grail Pro Disc Wheelset a great option as the "One" wheelset you need if ride disc brakes year round in different disciplines.

These wheels are shipped pre-taped (2 layers) for tubeless or tube use, and have 44mm, alloy tubeless valves with removable cores. You get the extra endcaps as described, as well as a set of standard quick releases. While tube-type tires are certainly an option, NoTubes Wheels truly shine when set up tubeless and using NoTubes sealant. Stan Koziatek drove the industry towards effective and safe tubeless ready technology that offered lighter weight rims and tires then the UST standard, and in a pretty short time frame, came to dominate the tubeless presence in the cycling world. Using Stan as an inspiration while you ride his ZTR Grail Pro Disc wheels is a great way to say thanks, and drive you to your own personal best.