Curve Cycling’s £5k Belgie Air frameset is made to celebrate its founder’s birthday

Collaboration with Bastion Cycles is limited to just 23 examples

Curve Cycling, in collaboration with Bastion Cycles, has released a very, very limited edition Belgie Air frameset, featuring titanium tubing, a carbon seat tube and mast, and a 3D-printed seat mast cap to celebrate the company founder’s 40th birthday.


Just 23 — Curve’s founder Steve Varga’s birthday is on the 23rd — of the disc-only framesets will be available for purchase, and to get your hands on one will cost you a cool £4,995 / AU$6.999 for the frameset, which are each custom built to order. Full builds are also available and priced as specced.

Like Curve’s other framesets, the Belgie Air is initially constructed in China from titanium, but the carbon seatpost/mast is constructed in Melbourne, Australia by carbon and titanium specialists Bastion Cycles, which is headed up by three engineers formerly of motoring giant Toyota.

The carbon seatpost/mast run is bonded to the seat cluster and topped with a cap
Curve Cycling

The seatmast uses Bastion’s signature carbon weave, which is showcased using a clear lacquer and complements the raw titanium finish. The carbon is bonded to the frame using aerospace grade epoxy resin, specifically developed for bonding metals to carbon fibre composites.

Topping the carbon fibre seatmast is a 3D-printed Ti6A14V Grade 5 titanium cap, manufactured using laser bed powder fusion, which is a similar process used for Pinarello’s custom Bolide cockpits first seen used by Team Sky.

The frameset uses a T47 bottom bracket
Curve Cycling

The frameset includes a T47 bottom bracket, Curve’s carbon fork and is disc-brake only.

Curve’s Belgie range of bikes and framesets have a combined focus to go fast without being limited by paved roads, taking in gravel, grass or cobbles, and sits between a traditional race- or endurance-focussed design.

The Curve Belgie Air is either sold as a frameset or specced to order
Curve Cycling

Curve says build time is approximately 70–100 days after sizing, and ordering is available via its website.