Number 6 Racing Superlight Aero Wheels Review: Deep Rim Speed Without the Weight

Introduction

Choosing a carbon wheel upgrade for a road bike has usually meant accepting a compromise. A deep section wheelset delivers speed on the flat but carries a weight penalty, while a shallow rim keeps the build light at the cost of aerodynamic efficiency. The Superlight Aero wheels from Number 6 Racing are built around the idea that riders no longer have to pick one or the other.

The specification is unusual for the price bracket. Rim depths of 52mm and 58mm, carbon fiber spokes, polished silver hubs with ceramic bearings from Tripeak, and a measured weight below 1,300g. Number 6 Racing also positions the wheelset below several of the more established premium brands, which makes the overall package worth a closer look for riders who want deep rim speed without the usual mass.

Who These Wheels Are For

These wheels suit riders who want one set to cover most of their riding. The combination of deep rims and low weight makes sense for hilly terrain with long steady gradients and short steep ramps, and equally for fast group rides and flat efforts where aerodynamic efficiency matters most. If you have been running 1,500g to 1,600g wheels and want a faster feeling set that still climbs well, this is the profile to consider.

The rims are hooked, which is a meaningful detail for riders who have avoided hookless designs. Hooked rims keep compatibility straightforward with a wide range of tubeless tires and remove a source of hesitation for anyone who prefers a conventional bead seat. There is one firm limit to note: maximum rider weight is 110kg.

Aerodynamic Speed and Low Weight

The rim profile follows a marginal gains approach. The front wheel is slightly wider than the rear, on the basis that leading edge aerodynamics matter more at the front of the bike than at the back. The difference is only a few millimeters, but in this part of the market those small details are where the gains are found.

Number 6 Racing has shared wind tunnel results claiming the wheels are 8 watts more aerodynamic than the Vision Metron SL 60. On the road, the wheels feel genuinely rapid when power goes down on flat tarmac, and they sit in a similar ballpark to deep section wheelsets such as the Enve SES 6.7. Compared with a 40mm rim, the difference in sustained speed is easy to notice.

Where the design pays off most is the combination of that aero profile with the low weight. On climbs that reach 20 percent and on long steady gradients, the reduction in rotating mass against heavier wheels is clearly noticeable, which is exactly the balance this category has been chasing.

Ride Quality and Stability in Crosswinds

Deep section carbon wheels with carbon spokes are usually expected to ride firmly, and these are better than that reputation suggests. A relatively low spoke count of 16 at the front and 20 at the rear takes the edge off the ride. They are not ultra plush, but they never feel harsh, and they remain perfectly manageable on rough, chipped tarmac. Fitting wider tires would add further comfort.

The one area where they fall slightly behind is wind. In very gusty, exposed conditions they do not quite match the sure-footed stability of a shallower rim or of comparable depth wheelsets from other brands. They are still very good, and this is a small caveat rather than a flaw, but riders who spend a lot of time on open, windblown roads should factor it in.

Tubeless Setup and Build Details

Getting the wheels running was straightforward. Tires mounted onto the rims without a fight, needing only a single tire lever to ease them over the bead, and they inflated tubeless using a regular track pump with no tubeless inflator or compressor required. That points to good tolerances in the rim construction, which is often where budget-friendly carbon wheels fall down. The test setup used 28mm tubeless tires.

Hub, Bearings, and Drivetrain Details

The hubs are finished in polished silver and run ceramic bearings from Tripeak, the same bearing supplier used by some far more expensive wheelsets. The freehub has a 45 tooth engagement and is compatible with Shimano, Campagnolo, and SRAM drivetrains, so most road groupsets can be accommodated without a swap.

Silver hubs are a small detail that changes the whole look of a bike. Seen from above, a polished silver front hub gives the wheelset a distinctly premium feel that black anodised hubs rarely match, and it is the kind of finishing choice that makes a build feel considered.

Things to Consider Before Buying

The rider weight limit of 110kg is the first thing to check. Beyond that, the warranty runs for four years, which is shorter than the lifetime coverage offered by several competing wheel brands and worth understanding before ordering.

The second consideration is how you buy them. These wheels are purchased direct rather than picked up from a local bike shop, which means a shipping wait and no shop counter to walk into if something goes wrong. Warranty and after-sales support are handled remotely, and while the brand is likely to look after customers, that lack of local backup is a real difference compared with a more familiar high street name.

Buying Advice

The case for these wheels rests on what you value most. If you want deep rim aerodynamics, a measured weight below 1,300g, ceramic bearings, hooked rims, and a set of silver hubs, the package is hard to match at the price, and the on-road performance backs it up. The wheels feel quick on the flat, respond well when climbing, and hold up across a wide range of road surfaces.

If a lifetime warranty, local dealer support, and absolute crosswind composure are priorities, a shallower or more established option may suit you better. For riders who accept the trade-offs of a direct purchase in exchange for performance and value, these deserve a place on the shortlist.

Conclusion

Number 6 Racing has produced a wheelset that resolves the old speed versus weight compromise more convincingly than most. Deep 52mm and 58mm rims, a sub 1,300g measured weight, hooked rims, ceramic bearings, and a price below the major premium brands add up to a genuinely quick, genuinely light set of road wheels. The shorter warranty, the direct purchase route, and slightly reduced stability in strong gusts are the honest caveats, and none of them undermine the core performance.