After the UCI announced back in April that disc brakes would be trialled at select races in August and September, riders from at least one team is using them at the ongoing Eneco Tour, marking their first use in professional road cycling.
Only Dutch Pro Continental outfit Team Roompot, the team of Johnny Hoogerland, has been seen using disc brakes with three riders on a different set-up, their bikes fitted with SRAM's Red 22 HydroR disc system. However a spokesman for the governing body confirmed to CyclingTips that "a total of eight UCI WorldTeams will trial disc brakes over 12 events in August and September."
So far, only SRAM and Shimano produce a hydraulic disc brake system for road bikes, with Campagnolo's own, as per usual, yet to hit the market.
"If the experience is satisfactory, disc brakes will be officially introduced to the UCI WorldTour in 2017." - Union Cycliste Internationale
While hydraulic disc systems offer significant benefits over cable-actuated discs and are popular in mountain bike and cyclocross circles, also gaining traction in the recreational road bike market, the professional road scene has, in general, been reluctant to adopt the trend. Among the concerns is a lack of an industry standard when it comes to axle length and rotor size - not to mention the fact that many bike manufacturers do not yet make a disc-ready frame suitable for racing.
In their April announcement, the UCI said testing would continue into next year. "If the experience is satisfactory," they said, "disc brakes will be officially introduced to the UCI WorldTour in 2017. The aim is to eventually introduce disc brakes to all levels of road cycling."