Speed is never the result of a single calculation, but the integration of multiple dimensions of performance. SEKA did not build just a bicycle. They built a complete performance system.
SEKA is a Shanghai-based frame builder that designs, tests and manufactures everything in-house: CFD across dozens of iterations, wind tunnel validation at Silverstone with Aerocoach, ultra-high modulus pitch carbon, and True-One-Piece Molding where a whole frame comes out of a single mould.
VELODROM is an official SEKA dealer. Framesets in every colourway, Gladius and Rapier cockpits, and complete custom builds assembled in our Barcelona and Girona workshops.
Aero roadThe complete aero system: frame, Gladius cockpit and MAG bottles tested together.
All-round race685 g RDC frame, Wind Eye comfort and wind tunnel speed. The faster all-rounder.
Gravel race56 mm clearance, integrated storage, road-bike aerodynamics. Built for the race, not the tour.
More than just aero gains. Aerodynamics, weight and stiffness engineered as one system.
Road racing is never decided by aerodynamics alone. Attacks, drafting, sprints, climbs, descents and high-speed corners constantly change the race. ExAero balances aerodynamics, weight, torsional stiffness, handling feedback and vertical compliance as a system, delivering higher efficiency, more direct response and consistent performance across race conditions.
ExAero retains effective cross-sections in critical load-bearing zones, while the coordinated shaping of head tube, fork crown, down tube and handlebar reorganises the front-end airflow. Frontal area grows by about 4.13 %, yet the overall system CdA still drops. Overall torsional stiffness rises from 367 to 416, a 13.4 % improvement over Spear.
Isolate every aero variable, then validate the complete bike. Frame, handlebar, bottles and rider were integrated step by step through three phases of wind tunnel testing with Aerocoach, from CFD validation of the bare frame to the final rider-plus-bike system with the Gladius ALTA riser cockpit.
Positioned exactly where the front-wheel wake meets the down tube and seat tube. The Fidlock magnetic MAG system actively guides airflow through this critical zone. Compared with two conventional round bottles, dual MAG lowers weighted CdA by 0.0047 m², about 5.49 W. Quick access, secure retention, even over rough roads. Sold separately.
Gladius standard or Gladius ALTA riser, both full one-piece monocoque. ALTA adds 25 mm of stack while keeping exactly the same reach. Gladius 375x100 weighs about 320 g, ALTA about 335 g. With 19 sizes in each version, the right position is a matter of choice, not compromise.
RDC: 820 g frame, T1100 + M46J, True-One-Piece Molding, UDH, BSA, 32 mm tyres. Frame, fork, seatpost, headset, axles.
Standard: 935 g frame, same geometry and aero shapes as RDC, UDH, BSA, 32 mm tyres. Frame, fork, seatpost, headset, axles.
Standard: 935 g frame, same geometry and aero shapes as RDC, UDH, BSA, 32 mm tyres. Frame, fork, seatpost, headset, axles.
RDC: 820 g frame, T1100 + M46J, True-One-Piece Molding, UDH, BSA, 32 mm tyres. Frame, fork, seatpost, headset, axles.
RDC: 820 g frame, T1100 + M46J, True-One-Piece Molding, UDH, BSA, 32 mm tyres. Frame, fork, seatpost, headset, axles.
Like a spear, enter the storm. The faster all-round road frameset, now in the 26 colourways.
The Sectionalized Design concept combines advanced materials, scientific analysis and precision manufacturing so the Spear compromises on no aspect of performance. 37 CFD optimisation iterations were validated in the Silverstone wind tunnel with Aerocoach across 280,000 sets of data: 6 W less drag and 15.27 seconds saved over the reference.
685 grams is just a number, and it does not represent the limit. Compared with the Exceed RDC the Spear is 90 g lighter, 5 % stiffer, with a 14.5 % better stiffness-to-weight ratio and 23 % more vertical compliance. Stiffness where you push, comfort where the road pushes back.
Standard and RDC, each in its own palette. From Ultra White, Meteor Pink, Solar Bronze, Nighthawk Blue and Thorian Purple on the RDC to Frosty Blue, Mint Green, Cosmic Beige, Achromatic Silver, Twilight Blue and Borealis Blue on the standard frame. Weight varies slightly with paint: 729 g ±35 g for a size M in Shadow Black.
Rapier: one of the thinnest handlebars on the market, True-One-Piece moulded. Four widths from 360 to 415 mm (385 to 440 mm in the drops) and six stem lengths from 80 to 130 mm, 19 specifications in total. The lower flare gives a better grip for sprinting. Developed with CFD and verified in the wind tunnel.
Standard: 780 g frame, same geometry and Wind Eye, UDH, BSA, 32 mm tyres. Frame, fork, seatpost, headset, axles.
Standard: 780 g frame, same geometry and Wind Eye, UDH, BSA, 32 mm tyres. Frame, fork, seatpost, headset, axles.
Standard: 780 g frame, same geometry and Wind Eye, UDH, BSA, 32 mm tyres. Frame, fork, seatpost, headset, axles.
Standard: 780 g frame, same geometry and Wind Eye, UDH, BSA, 32 mm tyres. Frame, fork, seatpost, headset, axles.
Standard: 780 g frame, same geometry and Wind Eye, UDH, BSA, 32 mm tyres. Frame, fork, seatpost, headset, axles.
Standard: 780 g frame, same geometry and Wind Eye, UDH, BSA, 32 mm tyres. Frame, fork, seatpost, headset, axles.
RDC: 685 g frame, TeXtreme + PITCH 65T/80T + PMI core, UDH, BSA, 32 mm tyres. Frame, fork, seatpost, headset, axles.
RDC: 685 g frame, TeXtreme + PITCH 65T/80T + PMI core, UDH, BSA, 32 mm tyres. Frame, fork, seatpost, headset, axles.
RDC: 685 g frame, TeXtreme + PITCH 65T/80T + PMI core, UDH, BSA, 32 mm tyres. Frame, fork, seatpost, headset, axles.
RDC: 685 g frame, TeXtreme + PITCH 65T/80T + PMI core, UDH, BSA, 32 mm tyres. Frame, fork, seatpost, headset, axles.
RDC: 685 g frame, TeXtreme + PITCH 65T/80T + PMI core, UDH, BSA, 32 mm tyres. Frame, fork, seatpost, headset, axles.
RDC: 685 g frame, TeXtreme + PITCH 65T/80T + PMI core, UDH, BSA, 32 mm tyres. Frame, fork, seatpost, headset, axles.
RDC: 685 g frame, TeXtreme + PITCH 65T/80T + PMI core, UDH, BSA, 32 mm tyres. Frame, fork, seatpost, headset, axles.
No road can hold back its speed. A racing-optimised gravel frame, engineered to stand out.
ExAero GR was developed through a comprehensive analysis of terrain conditions in premier gravel races, together with athlete caloric consumption and storage volume requirements. It harmonises integrated storage, expanded tyre clearance, systemic aerodynamic profiling and low weight. In its race-ready configuration, its total aerodynamic performance reaches parity with an elite road racing frame.
TORAYCA T1100G and M46J give the frame high tensile strength and fracture toughness, so 980 g comes with the impact resistance and durability gravel racing demands. Trail sits between 71 and 60 mm, chainstays at 423 mm, BB drop 74 to 70 mm: sharp acceleration with unflappable composure on loose surfaces.
The ideal tyre width is not a fixed value, it should be tuned to the course. With 56 mm front and 52 mm rear clearance the ExAero GR lets you choose the optimal setup for any race or terrain, while CFD-mapped airflow keeps the complete system, frame, clearance, storage and bottles, as fast as a road bike.
Integrated down-tube compartment with Fidlock magnetic latch. Room for spare tube, CO2 and tools, saving about 2.5 W versus a saddle bag of the same volume. Modular mounting interfaces on down tube, top tube and seatpost adapt the bike to every race profile.
Gladius GR is an integrated cockpit engineered specifically for the ExAero GR. Three widths (380/440, 400/460, 420/480) and five stem lengths from 80 to 120 mm. The drops flare 16° outward with a micro-textured anti-slip surface. About 395 g in 400/460-90.
980 g frame, T1100G + M46J monocoque, T47 BB, UDH, 56/52 mm tyres, integrated storage. Frame, fork, seatpost, headset, axles.
980 g frame, T1100G + M46J monocoque, T47 BB, UDH, 56/52 mm tyres, integrated storage. Frame, fork, seatpost, headset, axles.
Complete build assembled at VELODROM. Groupset and wheels as listed, Gladius GR cockpit available.
Wind Eye suppresses the turbulence caused by low-pressure areas at the seat tube and rear wheel. CFD shows 2.66 W saved on the Spear frameset at 40 km/h. The open-frame architecture gives stable lateral support under pedalling load while allowing up to 16 or 17 mm of vertical seatpost movement, filtering road vibration without giving up pedalling stiffness.
One mould, one complete frame. No joints, no bonding. Traditional frames are produced from two or three moulds and glued together. A continuous load path maximises stress-bearing capacity and lets the carbon perform at its full potential: better stiffness, fatigue life and impact resistance, and 25 g less per Spear frame.
TeXtreme, DIALEAD pitch-based PITCH 65T and 80T, PMI foam core, Toray T1100 and M46J. PITCH 65T reaches 2.1 times the modulus of T1000, PITCH 80T 2.5 times that of T1100. Each Spear is laid up from 350 pieces of carbon, optimised across more than 30 experiments. Critical parts are tested several times beyond ISO: the seatpost at 144 kg for 150,000 cycles.
Every SEKA frame is designed around its own one-piece cockpit. Choose the width and stem length that fits you: 19 sizes for Gladius, Gladius ALTA and Rapier, 15 for Gladius GR. Our fitters in Barcelona will size it with you.
ExAero standard cockpit. 19 sizes, about 320 g in 375x100.
ExAero riser cockpit, +25 mm stack, same reach. 19 sizes, about 335 g.
ExAero GR cockpit, 16° flare, 15 width and stem combinations.
Spear cockpit. 360 to 415 mm, stems 80 to 130 mm, 19 sizes.
| ExAero | Spear | ExAero GR | |
|---|---|---|---|
| Discipline | Aero road racing | All-round road racing and climbing | Gravel racing |
| Frame weight | RDC 820 g · STD 935 g | RDC 685 g · STD 780 g | 980 g |
| Aero claim | -3.68 W vs Spear, -11.63 W with ALTA + MAG | -6 W vs Exceed, -2.66 W from Wind Eye | Parity with an elite road frame in race config |
| Max tyre | 32 mm | 32 mm | 56 mm / 52 mm |
| Seatpost flex | 16 mm | 17 mm (+23 %) | 16 mm · 106 N/mm |
| Sizes | 7 | 5 + 2 (MR, LR) | 6 |
| Cockpit | Gladius / Gladius ALTA · 19 + 19 | Rapier · 19 | Gladius GR · 15 |
| Bottom bracket | BSA 68 mm | BSA 68 mm | T47 68 mm |
| Hanger | UDH | UDH | UDH |
| Storage / bottles | MAG (-5.49 W) | — | Down-tube compartment (-2.5 W), MAG bottles (-6.9 W) |
| Carbon | T1100 + M46J | TeXtreme + PITCH 65T/80T + PMI | T1100G + M46J |
| Frameset price at VELODROM | from €2.799 (RDC €3.599 to €3.799) | from €2.699 (RDC €3.199) | €2.999 |
Weights unpainted, excluding hardware, ±35 g. Aero figures as published by SEKA, see each white paper for test conditions. Prices in EUR incl. VAT.
ExAero is the aero road race bike, fastest as a complete system with Gladius cockpit and MAG bottles. Spear is the lighter all-rounder, 685 g in RDC, for climbing and mixed racing. ExAero GR is a gravel race frame with 56 mm clearance and integrated storage. Book a fitting in Barcelona and we will size and spec it with you.
RDC (Race Day Combatant) uses a higher-modulus layup for a lighter frame: 820 g vs 935 g on ExAero, 685 g vs 780 g on Spear. Geometry, aero shapes, Wind Eye and compatibility are identical, the standard frame is simply the more accessible option.
ExAero and Spear take up to 32 mm actual width on 700c wheels. ExAero GR takes 56 mm front and 52 mm rear.
All three use a SRAM UDH hanger, 12 x 100 and 12 x 142 mm thru-axles, flat mount disc brakes and fully internal routing through the SEKA cockpits. ExAero and Spear have a BSA 68 mm threaded bottom bracket, ExAero GR uses T47. Electronic groupsets from SRAM and Shimano are the natural fit.
Frame, fork, seatpost, headset and thru-axles. Cockpits (Gladius, Gladius ALTA, Gladius GR, Rapier) and the ExAero MAG bottle system are sold separately so you can pick your exact size.
Yes. VELODROM is an official SEKA dealer with framesets in stock in Barcelona and Girona. We assemble complete custom builds in our workshops, offer bike fitting, and ship across Spain and Europe.
Pick the frame, the colour and the cockpit size. We assemble it, fit it to you and hand it over ready to race, in Barcelona or Girona.
