Stans No Tubes Flow CB7 27.5-inch Rims

Our lightest and most advanced Flow rim combines lightweight carbon construction with strategically reinforced rim sections, a shape designed to absorb vibrations, and an asymmetric rim design that builds into a stronger overall wheel. The Flow CB7 rim is light, tough, and ready for any climb up the mountain, and any line down.

The asymmetric design of the Flow CB7 rim allows for offset spokes, creating a stronger overall wheel, while Stan's patented rim design ensures easy tubeless inflation and reliability. Asymmetric rims usually struggle to inflate easily and maintain a reliable seal on both sides of the rim. But Stan's BST-Asymmetric rims equalize pressure for easy inflation and total ride confidence under even the hardest cornering. Flow CB7 carbon rims rely on Stan's RiACT, or radial impact absorbing carbon technology to create a superior ride that actually absorbs vibrations. Unlike lesser carbon rims that ride stiff and transfer impacts and vibration to the suspension and rider, the Flow CB7 is able to deflect radially to help prevent pinch flats, roll faster and handle better. The RiACT rim shape, combined with the added bracing angle strength of the Flow CB7’s asymmetrical drilling, also maintains excellent lateral stiffness and strength.

If you're searching for the ultimate lightweight trail and all mountain rim, and a rim with a proven track record for tubeless performance, the Flow CB7 is the right rim for you.

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 BST-Asymmetric Technology

BST-Asymmetric rims combine Stan's patented Bead Socket Technology--the original and still most reliable tubeless-ready rim design--with an asymmetric shape that allows for offset spokes, creating a stronger overall wheel. Most asymmetric rims struggle to inflate easily and maintain a reliable seal on both sides of the rim, but Stan's BST-Asymmetric rims equalize tire retention and dent resistance on each side of the rim, allowing for easy inflation and total ride confidence under even the hardest cornering.

Stan's BST Asymmetric rims feature distinct spoke hole offsets based on rim width. At 25mm wide, Crest MK4 rims have 1.5mm of spoke offset. The 28mm Arch MK4 rims use an offset of 2.5mm. The 30mm wide Flow MK4 rims use a 3mm offset. This level of precision optimizes spoke tension balance and allows for the strongest and most effective tubeless rim shape. The Crest MK4 asymmetric rim, for instance, has a near perfect 92% balance between drive side and non-drive side spoke tension, versus the 58% spoke tension balance of previous symmetric Crest MK3 rims. When used with M-pulse or E-sync hubs, Stan's MK4 BST-Asymmetric allows a single spoke length to be used for all matching sets. Whether you choose a MK4 wheelset with M-pulse hub or S2 wheelset with E-sync hub, a complete set of Stan's Crest, Arch, or Flow wheels will each use only a single common and readily available spoke length that works front or rear, either drive side or non-drive side, making maintenance and service easier than ever.

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

• BST-Asymmetric design combines Stan’s legendary easy tubeless inflation with a stronger, more balanced wheel build
• Low-profile 29mm internal width optimizes tire shape, traction, and control for 2.3-2.6” tires
• Carbon RiACT rim shape maximizes radial compliance while resisting lateral flex to absorb impacts, roll faster, and increase control
• Shape and layup equalize pressure and balance impact forces on both the long and short sides of the rim, making both stronger
• Custom decal colors
• 7-year carbon rim warranty and lifetime crash replacement

Specification

• Rim Internal Width: 29.0mm
• Rim External Width: 35.0mm
• Rim Depth: 18.3mm
• Hole Count: 32-hole
• Rim Material: Carbon
• Brakes: Disc Only
• ERD: 564mm, 4mm Offset
• ETRTO: 584 x 29.0mm
• ISO: 27.5" x 35mm
• Tape: 30mm
• Valve: Presta
• Max Spoke Tension: 105kgf (1030N)
• Max Pressure with 2.40" Tire: 37psi
• Max Pressure with 2.80" Tire: 26psi
• Rim Weight: 420g