BMC CG 39 SL Wheelset
Best lightweight carbon wheelset for competitive gravel racers tackling steep climbs.
Get ready to conquer any terrain with the BMC CG 39 SL Wheelset! This is BMC’s lightest carbon wheelset, tipping the scales at an incredibly light 1380g, and it features aero carbon spokes for superior performance. It's an original, purpose-built gravel race wheelset designed specifically for tackling all types of gravel, especially the steep climbs. You'll love how fast, light, and incredibly smooth these wheels ride and race—they truly make your legs feel like diamonds as you take on whatever the gravel world throws at you. Plus, being tubeless ready with a 25mm internal width, this wheelset is futureproofed for all your riding needs.
Owner Satisfaction
4.5
/ 5
Category Rank
970
/ 1917
#970 in Bicycle Wheels
Size
278292
/ mm / mm
Who it's for
- Climbers seeking effortless acceleration and reduced rotational weight
- All-road riders needing stability across varied terrain and wind conditions
- Performance cyclists prioritizing long-term reliability and precise handling
Who should skip it
- Budget-conscious riders looking for more affordable carbon wheel options
- Time-trialists requiring maximum aerodynamic efficiency for flat-road speed
- Cyclists needing immediate, widespread access to local repair services
Performance breakdown
Climbing Efficiency
Featherweight construction makes steep gravel ascents feel effortless and snappy.
Aerodynamic Profile
Aero carbon spokes slice through headwinds to maintain high-speed momentum.
Ride Compliance
Carbon layup absorbs harsh trail chatter for a remarkably smooth experience.
Tire Compatibility
The 25mm internal width perfectly supports modern, high-volume gravel tires.
Acceleration Response
Low rotational mass provides instant power transfer when sprinting out corners.
Tubeless Integration
Reliable rim design ensures a secure, hassle-free tubeless setup for racing.
Key Specs
Size
278mm / 292mm
Size
286mm / 287mm
Know before you buy
The wheelset weighs 1380g, making it the lightest carbon option in the BMC lineup.
Yes, the 25mm internal rim width is designed to support modern, wider gravel tires effectively, providing a stable platform for varied terrain.
Absolutely. The wheelset is tubeless-ready, allowing you to run lower pressures for better traction and puncture protection on rough gravel.
The aero carbon spokes reduce overall weight while improving aerodynamic efficiency, helping you maintain speed on flatter sections without sacrificing performance on steep climbs.
Yes, the CG 39 SL is a purpose-built gravel race wheelset engineered to be fast and responsive, specifically excelling on steep, technical climbs.
Still have a question?
Ask Hayley anything about this product before you decide.