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IDEA ROUBAIX carbon wheels off-road

IDEA / CARBON GRAVEL WHEELS

ROUBAIX

Speed on gravel and confidence off-road

Discover the model ranges Compare all models
35 / 45 mmRim depths
27 mmInternal width
up to 140 kgWeight limit by range

IDEA / ROOM FOR MORE ADVENTURES

Your gravel
New possibilities

ROUBAIX carbon wheels bring experience from the CALOBRA range to gravel. Greater internal rim width and hookless construction support higher-volume tubeless tyres, lower pressures, comfort and efficient power transfer.

Choose a 35 or 45 mm rim depth and one of three spoke and hub levels. Full specifications for all six standard configurations follow below.

01 / WEIGHTfrom 1 240 g

See the full comparison for weights by model and specification

02 / CARBON SPOKESLighter spokes

Greater strength and weight savings of up to 200 g according to the catalogue

03 / TUBELESS SYSTEMmilKit

A tubeless kit for a compatible rim and tyre combination

04 / OUR OWN SIGNATUREIDENTITY BLACK

Matt black with understated IDEA logo graphics

01 / MODEL RANGES

ROUBAIX
EVO & ULTRA

Shared carbon rims
Different spoke and hub levels

01Reliability for every mile
A pair of IDEA ROUBAIX wheels

IDEA ROUBAIX

The standard IDEA ROUBAIX range combines carbon rims, DT Swiss 350 hubs and DT Swiss AEROCOMP spokes. It focuses on strength, durability, build quality and reliable use with straightforward maintenance.

Lower weight helps acceleration. The final configuration balances quality, performance and price, while allowing individual components to be serviced later.

Hubs
DT Swiss 350 SP CL
Spokes
DT SWISS AEROCOMP SP
Spoke holes
24/24 holes
Weight limit
120 kg
Pair weight
1 390–1 460 g

Range character IDEA rating

85 / 100
90 / 100
85 / 100
Choose ROUBAIX
02Low weight and carbon spokes
A pair of IDEA ROUBAIX EVO wheels

IDEA ROUBAIX EVO

IDEA ROUBAIX EVO pairs IDEA EVO CARBON spokes with DT Swiss 350 hubs. The spokes are compatible with common hub types and standard nipples.

It combines the proven ROUBAIX foundation with the low weight and high strength of carbon spokes, while retaining practical servicing and individual spoke replacement.

Hubs
DT Swiss 350 SP CL
Spokes
IDEA EVO CARBON SP
Spoke holes
24/24 holes
Weight limit
130 kg
Pair weight
1 250–1 320 g

Range character IDEA rating

90 / 100
95 / 100
90 / 100
Choose ROUBAIX EVO
03IDEA’s own system for maximum performance
A pair of IDEA ROUBAIX ULTRA wheels

IDEA ROUBAIX ULTRA

The top IDEA ROUBAIX ULTRA range pairs IDEA’s own F1 ULTRA hubs with IDEA ULTRA CARBON spokes. Rims, hubs and spokes form one system focused on maximum performance.

The construction includes a 54-tooth engagement mechanism, carbon spokes with a 4 mm thread and a choice of stainless steel or DT Swiss ceramic bearings.

Hubs
IDEA F1 ULTRA SP CL
Spokes
IDEA ULTRA CARBON SP
Spoke holes
21/24 holes
Weight limit
140 kg
Pair weight
1 240–1 310 g

Range character IDEA rating

100 / 100
100 / 100
100 / 100
Choose ROUBAIX ULTRA

Weights refer to standard specifications. The range character ratings are an indicative manufacturer comparison.

IDEA ROUBAIX carbon rim geometryIDEA ROUBAIX / EVO / ULTRA

02 / CARBON RIMS

More room
More control

ROUBAIX rims are available in depths of 35 and 45 mm. An internal width of 27 mm and an external width of 32 mm provide space for gravel tyres.

Hookless geometry supports lower pressures and higher-volume tyres. With a suitable tyre setup, the result is comfort, off-road control and lower rolling resistance.

27 mmInternal width
32 mmExternal width
35 / 45 mmRim depth
Choose an individual rim
IDEA ROUBAIX rims in IDENTITY BLACK design

IDENTITY BLACK

Understated and distinctively IDEA

The unified design combines matt black with a subtle IDEA logo. It complements the bike’s appearance and lets the construction speak for itself.

The graphics also serve as a trademark and are not intended to be removed. An additional marking is inside the rim profile, opposite the valve.

HOOKLESS / COMPATIBILITY

The right tyre
The right pressure

For ROUBAIX the specified tubeless tyre size is 32-622 and larger, in a hookless-compatible specification. Dimensions follow ETRTO – European Tyre and Rim Technical Organisation.

The geometry supports tubeless setups and conventional inner tubes. Both require a compatible tubeless tyre.

4.0 barMaximum pressure for ROUBAIX rims

For gravel wheels, optimum pressure depends more on terrain and intended use. Always observe the lower of your specific rim and tyre limits.

Tyre and pressure guide

RIM GEOMETRY

Precise dimensions
for every model

Two rim depths
A shared foundation across the range

Scroll the table horizontally

IDEA rim geometry ROUBAIX
ModelDepthInternal / external widthWeightERDType
IDEA G35 ROUBAIX35 mm27/32 mm370 g570 mmhookless
IDEA G45 ROUBAIX45 mm27/32 mm410 g550 mmhookless

These rims are used across ROUBAIX, ROUBAIX EVO and ROUBAIX ULTRA. The construction has undergone internal aerodynamic and load testing.

03 / HUBS

A reliable foundation
and IDEA’s own system

DT Swiss 350 hubs

ROUBAIX / ROUBAIX EVO

DT Swiss 350 / 240 / 180

Standard specifications use DT Swiss 350. All models ROUBAIX and ROUBAIX EVO offer the higher-end DT Swiss 240 or 180. Choose your exact specification when configuring.

Standard model
DT Swiss 350 SP CL 24/24
Ratchet
36 teeth
Bearings as specified
TPI stainless steel
Freehub / option
SRAM, Shimano, Campagnolo
Thru-axles
100 × 12 / 142 × 12 mm
Hub weight
360 g
IDEA F1 ULTRA hubs

ROUBAIX ULTRA

IDEA F1 ULTRA

IDEA’s own hubs feature a redesigned construction, bearings and a 54-tooth engagement mechanism. TPI stainless steel bearings can be replaced with DT Swiss ceramic bearings when configuring.

Model
IDEA F1 ULTRA SP CL 21/24
Ratchet
54 teeth
Bearings
TPI stainless steel / DT Swiss Ceramic
Freehub / option
SRAM, Shimano, Campagnolo
Thru-axles
100 × 12 / 142 × 12 mm
Hub weight
340 g
IDEA F1 BODY mechanism

IDEA F1 BODY

54 teeth
Quick engagement

The 54-tooth mechanism provides direct power transfer and a short engagement delay. It is available with TPI or DT Swiss Ceramic bearings and SRAM, Shimano and Campagnolo freehub options.

04 / SPOKES

Steel or carbon
Every spoke matters

ROUBAIXDT Swiss AEROCOMP SP

Steel spokes

DT Swiss AEROCOMP SP

A proven spoke setup focused on strength, reliability and aerodynamics. The standard choice for the CALOBRA range.

Profile
2.1 × 1.2 mm
Thread
2.0 mm
Spoke weight
5.5 g
Spoke set weight
264 g
Conventional DT Swiss spokes
ROUBAIX EVOIDEA EVO CARBON SP

Carbon spokes

IDEA EVO CARBON SP

Carbon spokes combine low weight and high strength. According to the IDEA catalogue, their aero profile reduces spoke aerodynamic drag by up to 15%.

The construction retains standard nipples and compatibility with common hubs. The wheels can be trued conventionally and spokes replaced individually.

Profile
3.0 × 1.4 mm
Thread
2.0 mm
Spoke weight
2.5 g
Spoke set weight
123 g
Conventional truing · Individual spoke replacement
ROUBAIX ULTRAIDEA ULTRA CARBON SP

Carbon spokes

IDEA ULTRA CARBON SP

IDEA’s top carbon spoke system uses an aerodynamic profile and a thread for 4 mm-diameter nipples. It combines low weight, strength and individual spoke serviceability.

The catalogue specifies spoke tension of 140 kg. ULTRA also allows conventional truing and individual spoke replacement.

Profile
3.6 × 1.0 mm
Thread
4.0 mm
Spoke weight
2.5 g
Spoke set weight
128 g
Conventional truing · Individual spoke replacement
The milKit tubeless system for ROUBAIX

TUBELESS SYSTEM

Ready
for milKit

IDEA wheels ROUBAIX can be fitted with a milKit tubeless kit. The right combination of rim, compatible tyre and system allows higher-volume tyres and suitable pressure for the terrain.

Discover the tubeless system

IDEA / EXPLORE THE DETAILS

ROUBAIX
in motion

Open the video separately

05 / FULL COMPARISON

6 configurations
Every number

Weight, hubs, spokes and weight limit
Compare specific specifications

Showing 6 of 6 configurations

Scroll the table horizontally

Standard IDEA wheelset specifications ROUBAIX
ModelHubsSpokesSpoke holesWeight limitWeightShop priceOptions
IDEA G35 ROUBAIXDT SWISS 350 SP CLDT SWISS AEROCOMP SP24/24 holes120 kg1390 gfrom 29,900 CZKChoose in the shop →
IDEA G45 ROUBAIXDT SWISS 350 SP CLDT SWISS AEROCOMP SP24/24 holes120 kg1460 gfrom 29,900 CZKChoose in the shop →
IDEA G35 ROUBAIX EVODT SWISS 350 SP CLIDEA EVO CARBON SP24/24 holes130 kg1250 gfrom 36,900 CZKChoose in the shop →
IDEA G45 ROUBAIX EVODT SWISS 350 SP CLIDEA EVO CARBON SP24/24 holes130 kg1320 gfrom 36,900 CZKChoose in the shop →
IDEA G35 ROUBAIX ULTRAIDEA F1 ULTRA SP CLIDEA ULTRA CARBON SP21/24 holes140 kg1240 gfrom 36,900 CZKChoose in the shop →
IDEA G45 ROUBAIX ULTRAIDEA F1 ULTRA SP CLIDEA ULTRA CARBON SP21/24 holes140 kg1310 gfrom 36,900 CZKChoose in the shop →

The ROUBAIX and ROUBAIX EVO ranges offer DT Swiss 240 or 180 hubs. We’ll refine the exact specification together when choosing your configuration.

Listed weights refer to standard configurations. Changing the hubs or other components affects the final weight.

Choose your own configuration

06 / TECHNICAL DATA

From construction
to the right tyres

Aerodynamic CAD testing

Aerodynamic CAD testing

Aerodynamic CAD test data informs the construction of individual IDEA wheelset ranges.

Test LAB
Recommended tyres and pressures

Recommended tyres and pressures

A compatibility and recommended pressure guide for each wheel model. Always check your specific rim and tyre combination.

Tyres & pressures
IDEA wheel construction data

IDEA wheel construction data

Technical component descriptions, spoke lengths and servicing data for long-term support of each model.

Construction data

07 / EXPERIENCE WITH IDEA DEVELOPMENT

Development and miles
Riding experience

DEVELOPMENT / TOMÁŠ BÁBEK

Developing IDEA wheels together

Tomáš Bábek describes his fifth season riding IDEA ROUBAIX ULTRA. At 88 kg and with sprint power reaching 2,300 watts, he values stiffness, low weight and reliability.

The review explores confidence in the equipment and experience with the construction that underpins IDEA wheel development.

Read the full review
TEST / MALLORCA

CALOBRA ULTRA in Mallorca

Testing continues with customers on demanding descents and long rides. Customer Honza shares his impressions of IDEA CALOBRA ULTRA wheels on Mallorca’s roads.

Real-world riding experience helps verify the construction and limits of IDEA products.

Read the full test

THE TEAM BEHIND IDEA

Our name in the peloton

Rafkarna and its IDEA brand are the main partners of Rafkarna IDEA Cycling Team. Discover its history, sporting results and shared foundations.

IDEA team & development

YOUR NEXT WHEELS

Choose your IDEA
We’ll refine the details together

Model, rim depth, hubs and tyres. Prepare a configuration and discuss it with us in person.

Choose a configurationGet advice on your choice