Rueda delantera tubular Corima de 4 radios, 650c, freno de llanta

The Corima 4 Spoke Tubular Wheel Front — 650c, Rim Brake is not a wheel that needs to introduce itself. Four carbon blades, a 650c diameter, a tubular interface — each decision is deliberate, and together they form a front wheel that has earned its reputation on the track, in the time trial lane, and at the pointed end of triathlon racing. This is specialist equipment, and it makes no apology for that.

Corima has been manufacturing carbon wheels in France since 1987, and the four-spoke format sits at the centre of that history. Where a conventional spoked wheel presents a tangle of round-section wire to oncoming air, the 4 Spoke replaces all of that with four large-section carbon blades — each shaped to manage airflow in a structured, deliberate way. Fewer interruptions to the airstream. Cleaner recovery on the trailing edge. At speed, the wheel develops a planted, directional quality that round-spoke builds rarely match. Steady power input translates into forward momentum with a consistency that feels almost mechanical — unhurried but relentless. That character is why this wheel has found its way into serious time trial and pursuit programmes for decades.

The 650c diameter is worth understanding clearly. Smaller than a standard 700c road wheel, the 650c format has a long history in triathlon front-end configurations and track pursuit setups — disciplines where a reduced wheel diameter allows a lower, more aerodynamic front-end position without compromising handling geometry. For the right rider on the right machine, that is a real and measurable gain, not a theoretical one. Add a tubular tyre — a format that prioritises low rolling resistance and a direct, responsive feel underfoot — and you have a front wheel configured for situations where performance takes precedence over day-to-day convenience. This is a race tool, and it is built to function as one.

Corima 4 Spoke Tubular Wheel Specs at a Glance

• Manufacturer: Corima
• Wheel Position: Front
• Diameter: 650c
• Tyre Interface: Tubular
• Brake Type: Rim Brake
• Spoke Configuration: 4-Spoke Carbon Blade
• Construction: Full Carbon
• Colour: Black
• SKU: COR4SPKFTT650
• Country of Manufacture: France

Design Benefits

1. Four-Blade Aerodynamic Structure: By replacing a full set of conventional spokes with four large-section carbon blades, the 4 Spoke dramatically reduces the number of surfaces disturbing the airstream on each wheel revolution. The blades are shaped to cut cleanly through oncoming air and shed turbulence efficiently on the trailing edge — a design philosophy that has made this wheel a fixture in time trial and track pursuit racing for good reason.
2. 650c Diameter for Position and Fit: The smaller 650c wheel diameter is a deliberate fit and geometry choice. It enables a lower, more aerodynamic front-end position in triathlon and time trial applications, particularly for riders whose proportions or fit requirements make a 700c front wheel geometrically compromising. The gain is not cosmetic — it translates directly into a more aggressive, sustainable position on the bike.
3. Tubular Tyre Interface: Tubular construction remains the tyre format of choice for riders who want the lowest rolling resistance and the most direct road feel available. Without the bead seat and clincher rim architecture, tubular rims can be built lighter and with a cleaner profile, and the tyre itself delivers a supple, responsive feel that is difficult to replicate with other formats at race pace.
4. Full Carbon Construction from a Specialist Manufacturer: Corima's history in carbon wheel production stretches back further than most brands in the category. The 4 Spoke is built in France, using manufacturing processes refined over decades of supplying professional and elite-level racing programmes. That heritage matters — not as a story, but as evidence of consistent, documented performance at the highest level of the sport.

Final Take

The Corima 4 Spoke front wheel in 650c rim brake configuration is built for a narrow and specific purpose — and it fulfils that purpose with real authority. It suits the time trialist, the triathlete, or the track pursuer who has already decided that the 650c format is right for their setup and wants a front wheel that does exactly what it is designed to do, without compromise. If that describes you, there is very little else to consider.