Stans NoTubes Sentry MK3 Rim is designed for today’s wider tyres, the Sentry MK3’s patented low-profile sidewall and lightweight 6069 alloy construction delivers width without the weight. Their patented BST rim design allows a tyre to expand to its full volume without distorting its shape, and the 32mm internal width of the Sentry MK3 is more stable with 2.50”-3.00” tyres. The result is less rolling resistance, more traction, and incredible handling. The Sentry MK3 wheelset is a great upgrade for anyone looking for the traction and control needed to take on even the most difficult trails. Offered in 26”, 27.5” and 29”, with the option to purchases as a wheel or a rim, the Sentry MK3 proves wider can mean faster.


Stan's NoTubes WiderWeight Rim Design - They all know the most important piece to the bicycle-terrain interaction is the contact patch between the tyre and terrain, so tyre profile and tyre pressure play huge roles in bicycle performance and overall handling. But many rims just don't work well with the tyres we're all using. Rims that are too narrow fail to offer sufficient sidewall support and protection to your tyres 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 tyre profile, decreasing traction and control and driving impacts directly into the rim, negating the impact absorbing advantages of a tyre's volume. Their WideRight rim widths are designed to strike the perfect balance between tyre volume and sidewall function.

Though its roots can be traced back to the original Flow and Crest rim designs, they officially began the WideRight design philosophy with the introduction of their carbon rim shapes. With their new MK3 (always pronounced Mark 3) series, WideRight expands to their aluminum rims.

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

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

WideRight profiles provide the optimal volume without distorting the tread pattern or the side knobs so each part of the tyre 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 tyre profiles not only allow for optimal tyre performance but also allow the tyre to do its secondary job of protecting the rim as well as the tyre's sidewall. A flat or bell-shaped tyre profile leaves the tyre exposed to sidewall cuts and creates undue chances for rim damage.

Ride WideRight

Optimises tyre profiles

Maximises traction

Properly distributes tyre volume

Promotes the design intent of the tyre profile and overall tyre performance

Reduces tyre pinch flats and sidewall damage

Allows tyre to protect rim

Stan's NoTubes BST Series - Bead Socket Technology rims are designed to match the shape of your tyre'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 tyre down deeper into the rim, putting pressure on sidewalls that causes friction, restricts tyre volume, and keeps the interface from forming a sufficient seal for tubeless use. BST rims secure the bead of the tyre, not the sidewall, creating an air tight seal while allowing the tyre'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, their BST rims are also lighter and stronger by design, and accelerate more quickly.

Key Differences Between BST and BST-R - Their BST system was developed specifically for tubeless use with pressures below 45psi. From their Iron Cross to their Hugo, they offer low pressure BST rims for tyres in the 32mm to 122mm width range. The broader pressure range of their BST-R Series rims and wheelsets means they're optimised for tubeless use with tyres in the 32mm to 50mm range at pressures of 45psi or lower, as well as 25mm to 32mm tyres specifically designated as "tubeless" that feature reinforced beads designed for pressures up to 115psi. Both BST and BST-R rims and wheelsets may be used with tubes.


More stable 32mm internal width for tyres up to 3.0

Gradual taper rim shape and 6069 alloy is lighter, stiffer, and stronger

Patented BST design for easiest and most reliable tubeless

Most trusted tubeless system for easy setup and low maintenance

Sapim Secure Lock aluminum nipples

WideRight optimised for 2.50”-3.00” Trail tyres


Rim Internal Width: 32.0mm           

ETRTO: 559x26.0 (26") / 584x26.0 (27.5") / 622x26.0 (29")

Rim External Width: 35.4mm  

ISO: 26"x35.4mm / 27.5"x35.4mm / 29"x35.4mm

Rim Depth: 17.6mm

Tape: 33mm

Hole Count: 32-hole  

Valve: Presta

Rim Color: Black  

Max Spoke Tension:Max Spoke Tension: 125kgf (1225N)

Material: 6069 Aluminum Alloy  

Max Pressure with 2.50" Tyre: 36psi

Brakes: Disc only  

Max Pressure with 3.00" Tyre: 24psi

ERD: 540mm (26") / 565mm (27.5") / 603mm (29")  

Rim Weight: 498g (26") / 521g(27.5") / 556g (29")

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