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Talk to The Wheel Experts

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Ultima C38 Aero SL

Designed for riders looking for lightweight carbon wheels with an aerodynamic advantage

Ultima Carbon C38 wheels are an extremely versatile all round performer. Fast up the hills and quick to accelerate and noticeably smoother on rough road surfaces.

The aerodynamic shape enables them to hold speed with less effort.

RACE PROVEN, UCI APPROVED WHEELS.

Professional triathlete Emma Jackson, 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.

CRAFTWORX

Bespoke Hand Built Designs:

Craftworx was founded in 2012. Co-Founder, and resident wheel specialist, Mark Kirby (see pic) learnt from the best, legendary wheel guru Charles Coin, in the late 80's. It is fair to say Mark hasn't been sitting idle for the last 30+ years. The wheel building techniques applied and wheel designs created are accredited to Mark's vast wealth of knowledge and experience and this is what makes every Craftworx wheel special.

Our Service:

Our business focuses on providing personalized service, amazing value and unmatched performance.

The Wheel Shop:

If you have questions, give Nathan and Mark a call.

0411 310 132

CONFIDENCE

Braking Performance

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, Australian Triathlete 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%.

“I was a bit worried about the braking performance of carbon rims but my concerns were put at ease on the first ride, not an issue, excellent braking performance” Mark from Melbourne

specifications

Rim Depth:
38mm

External Rim Width:
25mm

Internal Rim Width:
16.5mm

Wheel Weight:
Front - 612g | Rear - 743g | Combined: 1355g*

Hubs:

Craftworx Ultima SL 247g
Sealed Bearings

Spokes & Nipples:

Sapim CX Ray Bladed Stainless Steel & Alloy Nipples

Ultima 38 Aero SL | Carbon Road Wheels | 1355g

*Wheelset weights will vary based on the configuration chosen.

Great experience end to end, completely recommended

I purchased a set of Ultima 38 Aero SL, both the product itself and the help I received were superlative.

I was interested in the 50s and the 38s, I asked about a mixed set, was told it'd be ok. After a nice yarn with Mark, it was clear that I needed a set of 38s, not a mixed 38/50. Mark didn't push me either way, just offered opinion and advice freely, which made it a very pleasant experience unlike when you go to a big box store and they simply try to push the most expensive item onto you ASAP.

I was offered a customized red set for which Mark sent the photos within 5 minutes of the call. Within an hour of putting in my order, they had it packed away and sent to the post office. I received it within a week, and had a question for which I sent an email. I got a phone call back within 1hr of my email. You just can't this kind of service anywhere else!

The wheels themselves are amazing. I've put them onto an old Cervelo Team Soloist, and it flies when my legs to their part. :) Compared to a set of Bontrager Aeolus 3s I have on my other bike, these are in no way inferior - I'd happily ride these against any other wheel on the market. I will be recommending these to my mates when they start getting the upgrade itch.

Thanks guys.

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!

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