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Our lightest, fastest wheelset ever

Fast is more than a feeling, it’s a science. The all-new Aeolus RSL X mixed-depth carbon fibre bike wheels redefine what speed looks like when every detail matters. A deeper front rim leads the way by cutting through the air with a rim shape giving greater stability in crosswinds, while a shallower rear rim delivers lighter weight. The result is our fastest, lightest, and most composed road wheelset to date. 

Meet the wheels

Aeolus RSL 43X

When every gram counts, Aeolus RSL 43X delivers the best performance for lightweight climbers.

Compared to the previous generation RSL 37:

• Aeolus RSL 43X weighs just 1220g — 105g lighter despite its deeper rim profile
• 0.5 watts faster at 45kph — as tested on-bike in the wind tunnel

Shop Bontrager Aeolus RSL 43X 

Aeolus RSL 65X

When all out speed matters on the road or in a sprint, trust Aeolus RSL 65X to help you get to the line first.

Compared to the previous generation of RSL 62:

• 2.1 watts faster at 45kph – as tested on-bike in the wind tunnel 
• RSL 65X wheelset weighs 1475g — 45g lighter

Shop Bontrager Aeolus RSL 65X 

28mm aero optimized

Aeolus RSL X wheels are aerodynamically optimized to deliver peak performance at 28mm.

Carbon spokes

Bladed carbon spokes reduce drag and drop 96 grams per wheelset compared to traditional steel bladed spokes – giving you a lighter, more aerodynamic system built to accelerate faster and hold speed longer. 

The carbon difference

Carbon construction is engineered to absorb road vibration, delivering a smoother, more controlled ride that reduces fatigue and keeps you fresher.

Better power transfer

A reinforced rear wheel profile increases stiffness where it matters most, providing more direct power transfer and a sharper, more responsive ride under load.

Reduced spoke count

With a reduced spoke count — 18 front and 24 rear — Aeolus X cuts weight without compromising strength. The streamlined build improves ride feel and responsiveness while maintaining the reliability riders expect on race day and beyond. 

Clean, reliable design

Lightweight Ratchet EXP freehubs, built on proven DT Swiss 240 architecture, deliver crisp, reliable engagement and smooth, fast rolling efficiency.

More from the Aeolus RSL lineup



We stand behind our wheels