The Argon 18 Anti Matter is Argon's aero gravel race bike, launched in 2026 as the racing counterpart to the Dark Matter: deeper aero tubing, 57 mm tyre clearance and integrated aero bags and bottles.

Gravel racers chasing watts on fast courses, and road riders who want an aero bike that handles dirt. For rougher, loaded riding, the Dark Matter is the one to look at.

Same family, two jobs: the Anti Matter is the race bike (aero, stiffer, integrated storage), the Dark Matter the endurance bike (more relaxed, more mounts). Argon claims a 14.5 W saving for the Anti Matter at 45 km/h.

More than its aero profile suggests, thanks to the tyre room. Run 45 mm or wider and it's a long-day bike; on narrow tyres it rides like an aero road bike.

Up to 57 mm. 45–50 mm suits racing; go wider for rough tracks.

It comes in size XS, S, M, L & XL.From £5,495, or from about £229 a month on 0% finance over 24 months.We highly recommend to do a bike fit before purchasing the Argon 18 Anti Matter, however, below are the general sizing based on height:XS (Extra Small / S (Small / M (Medium / L (Large / XL (Extra Large /