Stans No Tubes Grail CB7 700c Rims

The Grail CB7 rim combines an incredibly light 300g weight, the reliability of the most trusted tubeless system, and Stan’s vibration damping carbon technology. For gravel racing and all conditions road adventures, the Grail CB7 is as comfortable as it is fast.

One of the biggest advantages of a tubeless wheel is the ability to seal flats almost instantly while you ride. With five patents on tubeless rim design (and counting), Stan’s NoTubes is the leader in tubeless innovation, and nothing beats the durability, convenience, and performance of our Bead Socket Technology.The BST rim design of the Grail CB7 has a maximum tire pressure of 85psi (5.9 bar), offering an ideal match for 25-40mm tubeless road and gravel tires. Across asphalt, gravel, and dirt, the Grail CB7’s rim provides the amazing traction and control only a Stan’s tubeless systems can offer, along with the ability to seal flats while you ride.

The Grail CB7 rim is constructed using our radial impact-absorbing carbon technology (RiACT) that combines a more compliant lower-profile rim shape with a special carbon lay-up process to better absorb vibrations and distribute impacts for a faster, more comfortable ride. Whether saving energy for a late race attack, or just the extra loop to the best coffee shop, the Grail CB7 lets you ride further, faster, and flat-free.

Technology

Stan's No Tubes RiACT Rim Design

Everyone knows carbon fiber can create a stiff wheel. We knew it could do much more. The carbon fiber rims on our CB7 series wheelsets are 30% stiffer laterally than our legendary aluminum rims, but the key to their outstanding ride quality is Radial Impact Absorbing Carbon Technology. Obsessive attention to the shape of the rim and a proprietary carbon fiber lay-up process lets us create carbon rims that absorb radial vibrations and impacts while maintaining lateral stiffness, keeping your wheels driving constantly forward with less energy loss than other carbon rims. Originally developed for or highly successful Valor rim, RiACT offers added strength, less rolling resistance, and the best ride of any carbon rim. On our Podium SRD wheelset, RiACT lets us create a rim that's lighter than the competition while also being stronger. Our carbon rims can deflect 7-10mm without damage or pinch flatting.

Smooth is fast. If there's one thing the overwhelming success of our tubeless technology has demonstrated, that's it. The more forward momentum your wheel and tire can maintain without deflecting off the ground and sending your energy upward and backward, the faster you roll. Our RiACT rims allow the wheel system to absorb more, offering levels of vibration damping and impact absorption never possible before. RiACT lets Stan's Podium SRD, Crest CB7, and Arch CB7 rims and wheelsets roll faster and last longer.

Stan's No Tubes Bead Socket Technology (BST)

Bead Socket Technology rims are designed to match the shape of your tire's bead to create a safer and more secure air tight interface. Unlike the secure “socket” of a BST design, conventional rim shapes drive the bead of the tire down deeper into the rim, putting pressure on sidewalls that causes friction, restricts tire volume, and keeps the interface from forming a sufficient seal for tubeless use. BST rims secure the bead of the tire, not the sidewall, creating an air tight seal while allowing the tire's sidewall to expand to its true, rounder, more effective profile. The result is more traction and less rolling resistance. With lower-profile, less vulnerable sidewalls, our BST rims are also lighter and stronger by design, and accelerate more quickly.

Stan's No Tubes WideRight Rim Design

The most important piece to the bicycle-terrain interaction is the contact patch between the tire and terrain, so tire profile and tire pressure play huge roles in bicycle performance and overall handling. But many rims just don't work well with the tires we're all using. Rims that are too narrow fail to offer sufficient sidewall support and protection to your tires and create a less stable shape. The result is less control in the corners, less traction on climbs, and more rolling resistance. Rims that are too wide also distort the tire profile, decreasing traction and control and driving impacts directly into the rim, negating the impact absorbing advantages of a tire's volume. Our WideRight rim widths are designed to strike the perfect balance between tire volume and sidewall function.

The Lightbulb.

Too narrow. Tire is constricted, robbing traction and cornering stability.

The Bell.

Too wide. Tire beads are pushed wide, deforming intended tire shape and tread design. Tire has less ability to absorb impacts and less cornering control, and sidewalls are exposed to cuts.

WideRight.

The perfect width. Tire expands to full volume without distortion. Tread pattern and side knobs are in the correct position for cornering, maximum traction and control with minimum rolling resistance.

WideRight rim profiles allow the tire to achieve its proper shape, and that's the foundation for a great handling, fast-rolling, and responsive bike.

Stan's WideRight system makes it easy to find the perfect rim width for the tire size and volume you ride. Too narrow of an internal rim mixed with a high sidewall design gives you a "light bulb" tire profile while an ultra wide rim on a narrower tire will give you a flat to "bell shaped" tire profile. Neither of these scenarios give optimal tire profiles nor allows the tire to perform as intended.

WideRight profiles provide the optimal volume without distorting the tread pattern or the side knobs so each part of the tire is in the correct position for rolling and cornering, allowing for maximum traction and control as well as offering minimal rolling resistance. The WideRight profile advantages don't stop there. Proper tire profiles not only allow for optimal tire performance but also allow the tire to do its secondary job of protecting the rim as well as the tire's sidewall. A flat or bell-shaped tire profile leaves the tire exposed to sidewall cuts and creates undue chances for rim damage.

Key benefits:

• Optimises tire profiles
• Maximizes traction
• Properly distributes tire volume
• Promotes the design intent of the tire profile and overall tire performance
• Reduces tire pinch flats and sidewall damage
• Allows tire to protect rim

Features

• Incredibly light 300g carbon rim
• 21.6mm internal width optimized for 25-40mm gravel and road tires
• Patented Bead Socket Technology for the easiest and most reliable tubeless performance
• Carbon RiACT rim shape maximizes radial compliance while resisting lateral flex to absorb impacts, roll faster, and increase control
• Custom decal kits available
• 7-year warranty and lifetime crash replacement

Specification

• Rim Internal Width: 21.6mm
• Rim External Width: 26.4mm
• Rim Depth: 19.3mm
• Hole Count: 24-hole
• Rim Material: Carbon
• Brakes: Disc Only
• ERD: 602mm
• ETRTO: 622 x 21.6mm
• ISO: 700c x 26.4mm
• Tape: 25mm
• Valve: Presta
• Max Spoke Tension: 105kgf (1030N)
• Max Pressure with 25mm Tire: 85psi
• Max Pressure with 32mm Tire: 70psi
• Max Pressure with 40mm Tire: 55psi
• Rim Weight: 300g