The new DUKE High-End Range of Gravel Wheels
SLR5 Manufacturing Process:
- Toray T1100 carbon fibre
- Integrated SpokeCore technology
- VFP (Varnish Free Process) finish
Sierra: Built for Adventure
- The most complete gravel wheel in the DUKE line-up
- Profiles (mm): 27 / 36 / 42
- From 1029 g per pair (Sierra 27 – NonPlus CL SP hubs – Sapim CX-Ray spokes)
- From 1593 €
Sierra Æra: Aero for Wide Tyres
- Signature Æra relief designed through CFD
- Up to 10% lower drag compared with a smooth rim, with no loss of stability in crosswinds
- Wide versions (W42 and W48), optimised for the front wheel
- Profiles (mm): W42 / 48 / W48 / 56
- From 1252 g per pair (Sierra Æra 48 – NonPlus CL SP hubs – Sapim CX-Ray spokes)
- From 1725 €
Custom Builds:
- One-to-one support to create your perfect wheelset
- Wide choice of hubs and spokes, built on 18 years of custom wheelbuilding expertise
- Visual personalisation via our range of custom decals
“The Right Path is Yours”
Gravel is no longer tied to one type of terrain.
- It is a 300 km GPX route with light bags.
- A singletrack taken a little too fast.
- A white road swallowed at over 35 km/h.
- A race where you ride in the pack, then alone in the wind.
- A forest climb, a battered descent, a paved surge, a trail that disappears.
- Sierra and Sierra Æra were developed for all these realities: gravel in its broadest form yet.
- Sierra focuses on lightness, comfort and control across long distances, rough terrain and routes with serious
elevation gain.
- Sierra Æra adds an aerodynamic dimension built for speed: fast tracks, long races, high average speeds and
stability.
- Bikepacking, gravel racing, ultra-distance, committed rides or one bike to do it all: Sierra and Sierra Æra do not
force gravel into a single definition. They give you the means to draw your own.
Sierra | Challenge the Unknown
Gravel rarely follows the same scenario for long. Sierra is designed for routes that take shape as the terrain unfolds. Its versatility, controlled stiffness and extreme lightness deliver the balance needed to move fast, stay in control and preserve your energy.
Available Rims:
- Profile 27mm, Weight 280gm, Spoke Count 24H, 29mm Internal, Intended Use – Adventure Gravel / Climbing
- Profile 36mm, Weight 335gm, Spoke Count 24H, 28mm Internal, Intended Use – Fast Adventure Gravel
- Profile 42mm, Weight 375gm, Spoke Count 24H, 28mm Internal, Intended Use – Fast Gravel / Rolling Courses
Recommended Combinations:
- Sierra 27 / 27: adventure gravel, hardpack terrain and/or significant elevation gain
- Sierra 36 / 36: fast adventure gravel, versatile
- Sierra 42 / 42: fast gravel, rolling courses, limited elevation gain
Sierra Æra | Cutting through Dust
Modern gravel racing is fast. Very fast. Our signature Æra relief comes to the track. An aerodynamic profile designed through CFD to disturb the airflow and reorganise it in a more laminar way. On Wide (W) versions, the external width is aligned with the sidewalls of the front tyre to optimise the tyre-rim transition.
Available Rims:
- Profile W42mm, Weight 420gm, Spoke Count 24H, 43mm Internal, Intended Use – Versatile Aero Front
- Profile W48mm, Weight 460gm, Spoke Count 24H, 43mm Internal, Intended Use – High Speed Aero Front
- Profile 48mm, Weight 390gm, Spoke Count 24H, 28mm Internal, Intended Use – Versatile Aero Rear
- Profile 56mm, Weight 410gm, Spoke Count 24H, 28mm Internal, Intended Use – High-Speed Aero Rear
Æra and Æra Wide: The New Aero Era of Gravel Racing
Developed through advanced CFD modelling, Æra technology uses a unique signature relief. The repetition of this aerodynamic micro-profile reduces drag by up to 10% compared with a smooth rim.
Introduced on our Strada Æra road reference, this approach is adapted here to the wide tyres used in gravel. With 28 mm internal width across the whole range, Sierra Æra follows a differentiated front/rear logic.
Æra Wide 42 or 48 at the Front
At the front, we recommend an Æra Wide version. With 43 mm external width, it creates an optimised tyre-rim transition. The aerodynamic benefit comes more from the alignment between tyre and rim than from an excessively deep profile. The result: more e iciency, without unnecessary wind exposure.
Æra 48 or 56 at the Rear
At the rear, we recommend a standard Æra version, with a slightly deeper profile. The rear wheel operates in airflow already disturbed by the rider and the pedalling motion: the value of a Wide rim is less obvious there. Crosswind sensitivity is also lower, which makes it possible to increase the profile for greater high-speed inertia without compromising stability.
A solution designed for competitors, long fast races and riders for whom average speed is not a detail.
Custom Builds
Available as fully custom builds, Sierra and Sierra Æra adapt to your riding style, your bike and your goals:
- Front / rear profiles of your choice
- Spoke count, pattern and hub choice to match your needs
- Carefully controlled spoke tensions and long-term reliability thanks to hand-building in our workshops
Learn more at the Duke Racing Wheels Website