Shimano Ultegra Di2 equipped super lightweight CF5 framed carbon aero bike complete with Reynolds BL60 carbon wheelset and fully integrated Vision Metron carbon cockpit. The Reacto has always been a class leading aero bike combining state of the art aerodynamics with rider comfort. The latest generation incorporated wider tyres for increased comfort but adding wider tyres resulted in aerodynamic compromises so a myriad of small improvements were required to over-compensate. In the World Tour no area can be ignored. Computational Fluid Dynamics CFD was used to model virtual wind tunnel performance guiding the changes which offered the most aerodynamic benefit: Tiny details like integrating the front Disc Cooler behind the fork and the rear disc caliper in the rear triangle and creating new bolt through axles with the thread integrated into the fork dropout minimise drag and improve aerodynamic performance. The Reacto CF5 needs just 209 watts effort for 45 km/h speed All Reacto have powerful hydraulic disc brakes with chainstay mounted calipers for better brake force dissipation. The flat mount standard keeps everything neat whilst sitting calipers on CNC'd aluminium Disc Cooler fins helps reduce operating temperatures by up to 35%. Cycling Weekly described it as 'without doubt one of the most complete bikes available on the market' Cyclingnews 'an utterly brilliant and faultless machine' and Cycling Plus were 'hugely impressed'. Highlights: Superlight CF5 pro level carbon frameset approx. 950g in size M Shimano Ultegra 2 x 12 Di2 transmission Reynolds BL60 aero carbon wheelset with Continental GP5000S TR 28c tyres Vision Metron integrated carbon cockpit Merida S-Flex seat post Disc Cooler technology FRAME CF5 IV - carbon - Premium fibres for lightweight and performance race geometry. Internal cable routing 142 x12mm axle standard flat mount rear brakes with Disc Cooler 1 1/2' to 1 1/4' headtube. Max tyre size - 30c FORK Reacto CF5 IV Disc; material: carbon; 700x30C max. tyre size GEARS  24 SHIFTERS Front: Shimano Ultegra Disc Di2 Rear: Shimano Ultegra Disc Di2 FRONT DERAILLEUR Shimano Ultegra Di2 REAR DERAILLEUR  Shimano Ultegra Di2 BOTTOM BRACKET Shimano SM-BB72-41B; Pressfit 86.5 CHAIN  Shimano M6100-12 CHAINSET Shimano Ultegra; PML300+PRECISION 3 power meter; 52-36 tooth chainset; Crank length: XXXS - 160mm XXS-XS - 165mm S-M - 170mm L-XL - 172.5mm CASSETTE Shimano Ultegra R8101; 11-30 teeth; 12 speed BRAKE LEVER Shimano Ultegra FRONT BRAKE Shimano Ultegra; Hydraulic disc with Shimano CL800; 160mm REAR BRAKE Shimano Ultegra; Hydraulic disc with Shimano CL800; 160mm GRIP Merida Road Expert HANDLEBAR Vision Metron 5D ACR EVO; material: carbon; XXXS-S - 380mm wide M-L - 400mm wide XL - 420mm wide STEM Vision Metron 5D ACR EVO; material: carbon; Length: XXXS-XS - 90mm S - 100mm M-L - 110mm XL - 120mm HEADSET FSA ACR SL bearing PEDALS Not included SADDLE Prologo Nago R4 PAS; Nack SEATPOST Merida Team CW; Aero shape; 15mm layback; material: carbon WHEEL SIZE 700C RIMS Reynolds BL60 Expert DB 100x12mm; 142x12mm; 21mm inner rim width; 60mm rim depth; Centerlock; Shimano HG; material: carbon; Tubeless ready tubeless tape and valves included SPOKES Part of wheelset - Reynolds BL60 Expert DB FRONT HUB Part of wheelset - Reynolds BL60 Expert DB REAR HUB Part of wheelest - Reynolds BL60 Expert DB FRONT TYRE Continental Grand Prix 5000S TR; 700x28C; kevlar bead; tubeless ready REAR TYRE Continental Grand Prix 5000S TR; 700x28C; kevlar bead; tubeless ready Colour Cool Grey Purple Other Disc cooler F/R and bottle cage