Craftworx Ultima C50 Aero SL Carbon Road Wheels - Craftworx Cycling

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Ultima C50 Aero SL Carbon Road Bike Wheelset | 1423g*

Looking to go faster?  Then look no further.

At 1455 grams, the Craftworx Ultima Aero SL is the new standard for speed on two wheels. Weʼve distilled the very essence of riding fast into pure carbon fiber pleasure without making a single compromise on stiffness or durability.

Whether youʼre a budding amateur, a hardened rouleur, or a rider with a deep affinity for all-day soul rides in the mountains, the Ultima Aero SL is built to deliver effortless aerodynamics and best-in-class power transfer.
The 50mm deep wheel generates and maintains airflow attachment, reducing drag and thereby keeping your speeds higher for longer.

With low weight, and bomber durability, the Ultima C50 Aero SL achieves a rare trifecta of qualities that admit them to the hallowed pantheon of truly versatile wheelsets. Climb, descend, or prowl the flats with confidence knowing that youʼre ready for whatever the road can throw at you.

SRAM XDR Now Available

Configure & BUY

The Craftworx Standard

Wondering how we achieve such a high standard? We do it one handbuilt wheel at a time in our Brisbane workshop. Our craft is building the best wheelsets available anywhere. Everything we create is built to meticulous standards that are constantly improved through marginal gains. With an industry-leading quality control practice in place, we are on the never-ending quest for wheel-building perfection.


The Ultima Aero SL carbon wheelset is equally at home racing UCI calendar bikes races and local after work group rides. Thatʼs because weʼve built them to the discerning standards of professionals like world-class triathlete Emma Jackson, who rode our Ultima Carbon wheels to two World Cup race podiums.

With invaluable feedback like hers, weʼve conclusively built the Ultima Aero SL wheelset to manufacturing standards that meet and exceed UCI testing requirements.



Our proprietary braking system resists heat build up.

Ultima Aero SL carbon wheels resist heat build up when youʼre flying downhill and apply the brakes.

Regardless of conditions, the Ultima Aero SL stop on a dime. Weʼve specially developed our proprietary carbon rim and brake pad system so that, when paired, create the perfect match.

Real Life Testing Conditions

Over a four-month training period in the Alps, world cup triathlete Emma Jackson barely scratched the surface of her Ultima Aero SL wheelset. All told, brake pad wear came in at a mere 55%, and there was zero wear on the carbon rims.

Ultima C50 Aero SL | Carbon Road Wheels | 1455g

Craftworx Ultima Carbon C50 Aero
Road Bike Wheel set

UCI Approved

Don't let the price tag fool you! Our aerodynamic carbon road wheels go as fast as they look.

Our R&D tells us that a 50mm rim depth combined with our "U" shaped profile is the optimum rim design for aerodynamics and wind shedding. Unlike most aero wheels, the Ultima C50's don't adversely suffer from cross wind drag.

More power and speed with less effort.

These wheels transfer every bit of energy into forward motion and minimise air drag, helping you sustain faster speeds over longer distances.

Our specially developed braking system gives ample stopping power in all riding conditions.

The 25mm wide carbon rim is perfect for running 23mm, 25mm and 28mm road tyres allowing you to fine tune ride comfort and road handling.

Suited to riders 70 to 115kg

OUR MOST AERODYNAMIC CARBON ROAD WHEELS - It’s all about speed. These wheels are FAST. The 50mm carbon rims use our Seamless Transition Technology to cut through the air, reducing drag. The overall result is your wheels spin faster using less energy, so you can ride quicker for longer. At 1582g they are light and fast up the hills as well as on the flats. The 25mm wide carbon rim is perfect for running 23mm, 25mm and 28mm road tyres allowing you to fine tune ride comfort and road handling. Suited to riders 70-115kgs.

RACE PROVEN, UCI APPROVED CARBON ROAD WHEELS - Designed to perform at an elite level, yet affordable to all riders. No fake promises, just results. World Class Triathlete Emma Jackson rode our Ultima C28 Carbon wheels to 2 World Cup Race Podiums! Not everyone who rides our Ultima carbon wheels races, but it’s still comforting to know they are manufactured to, and exceed, UCI testing requirements.

HAND BUILT TO PERFECTION -Every wheel set is hand built by us here at Craftworx in our Brisbane workshop. We are wheel building specialists. Over time, we have perfected our wheel building craft. We have all the latest hi-tech equipment and follow a strict quality control process with every wheel to ensure it is built to our exacting standards. They have to be perfect!

HIGH PERFORMANCE, LOW TEMPERATURE, BRAKING SURFACE - In wet or dry conditions, Ultima carbon wheels stop with ease. Our carbon rims and brake pads have been developed to resist heat build up ( the biggest single reason why carbon rims “melt or delaminate” under prolonged braking ). Want proof, Emma Jackson, 4 months training in European Alps. 6,875km. Total elevation gain 76,200m. Longest descent 20 minutes. End result, zero wear on carbon rims, brake pad wear at 55%.

EVERYTHING YOU NEED IS IN THE BOX - Craftworx carbon brake pads, specially formulated for optimal braking performance in all weather and riding conditions. Super lightweight quick release skewers, 71 grams. Craftworx rim tapes. Wheel care instructions and of course, the wheels!

Ultima Carbon Road Disc Wheel Warranty

Hand Built wheels ride better and last longer.

Craftworx are wheel building specialists. Over time, we have perfected our wheel building craft. We have all the high tech wheel building gadgets and QC check points to ensure that every wheel we build is perfect!



Rim - Craftworx Ultima C50 Carbon

Height - 50mm

External - 25mm

Internal - 18.5mm

20 Hole Front & 24 Hole Rear

Front: 707g

Rear: 875g

Total Wheel Weight:1582g

Hub Model - Craftworx Ultima Road Hubs

Bearings - Oversized Precision Sealed Bearings

Freehub - Shimano/Sram 10/11 Speed or Campagnolo 10, 11 or 12 Speed Available

Butted Stainless Steel (Black)



Suitable for tyre widths 25mm - 28mm

Rim Tapes Fitted

Craftworx Stainless QR Skewers

Craftworx Ultima Carbon Brake Pads

Warranty and Wheel Care Information

Craftworx Carbon Technology

Next Generation Carbon Technology & Performance


Customer Reviews

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*Wheelset weights will vary based on the configuration chosen.

Customer Reviews

Based on 22 reviews

Ultima 38 Aero SL | Carbon Road Wheels | 1375g | 38mm Deep | 25mm Wide

No excuses

I don't have any excuses any more, these wheels are light and stiff and roll true and forever. Its now down to my legs! Great to see a local wheel builder doing good things. Highly recommend buying direct rather than via numerous middlemen, result being the consumer ends up paying margin on margin.

Aero SL Carbon 38/50

Awesome set of wheels, buy right, buy local you won’t be disappointed.

Amazing in every aspect

Having had a discussion with Nathan it was established that the C28’s would be the most suitable Wheelset for my needs, and I am very pleased with the quality and performance. Remarkable build quality!

New wheels

Absolutely brilliant, smooth ride, really accelerate up hill, superb on corrugated dirt roads, great service