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Cannondale Synapse Carbon 2 RL Ultegra 54cm




For 2023, the Cannondale Synapse Carbon 2 RL Disc Road Bike features an all-new frame and cutting-edge SmartSense technology to take your riding experience to the next level. Cannondale has taken the winning Synapse formula and enhanced it, with this latest edition delivering a faster, more comfortable and refined ride character. Comfortable yet fast, the truncated tubeset issues free speed, while the Proportional Response construction ensures consistent performance across the size range.

Unique to the Synapse is the SmartSense system. It acts as a second set of eyes and ears to keep you safe on busy roads, incorporating a traffic-sensing radar system and bright front and rear lights that automatically toggles on/off to match the ambient light conditions. The Foresite front light has been made in collaboration with industry experts Leyzne and delivers 350 lumens of brightness to illuminate your low-light rides, keeping you safe and visible on the road. The rear light/radar system utilises Garmin Varia technology and can sense vehicles up to 140m away, helping to keep your eyes on the road and not over your shoulder.

The specification features the ever-impressive Shimano Ultegra 11-speed drivetrain, which combines slick shifting performance with a low, race-friendly weight. The Fulcrum Rapid Red 900 wheels are lightweight for instantaneous acceleration whilst still offering excellent durability, and hydraulic Shimano disc brakes deliver consistent braking power in all conditions.


  • Subtle aerodynamic frame changes deliver free speed, without any additional weight
  • Wide tyre clearance for up to 35mm road tyres
  • An all-new frame design sees enhanced compliance to boost ride comfort
  • The SmartSense battery and integrated lights work to improve your visibility and awareness on the road
  • Foresite front light offers 350 lumens of brightness and is produced in conjunction with Leyzne
  • Hindsite light and radar system are born from a collaboration with Garmin
  • The radar system can sense vehicles up to 140m away and features a “Brake Alert” function to highlight your braking to other road users
  • Threaded BSA bottom bracket and tube-in-tube internal routing offer simple home maintenance
  • Hidden rack/mudguard mounts improve versatility
  • Adaptable design with a dynamic and responsive ride character
  • Proportional Response Construction frame design ensures the same ride quality across the entire size range
  • Lightweight Shimano Ultegra groupset delivers crisp, 11-speed shifting
  • Hydraulic Shimano disc brakes provide confidence in wet-weather conditions


Frame Cannondale Synapse Carbon, SmartSense enabled, Proportional Response size-specific design, BSA threaded BB, flat mount brake, 12x142mm thru-axle, thru-tube internal cable routing with Switch Plate, removable mudguard bridge, hidden rack/mudguard mounts
Fork Cannondale Synapse Full Carbon, integrated crown race, Proportional Response size-specific design, 12x100mm thru-axle, thru-tube internal routing, hidden mudguard mounts
Headset Synapse Sealed Bearing, integrated, 1-1/4”-1-1/8”
Bottom Bracket Shimano R60 BSA
Stem Cannondale 2, 6061 Alloy, 31.8, 7 degree
Handlebar Cannondale 2, 6061 alloy, compact
Bar Tape Fabric Knurl bar tape
Front Brake Shimano Ultegra, hydraulic disc, 160mm
Rear Brake Shimano Ultegra, hydraulic disc, 160mm
Brake Levers Shimano Ultegra, hydraulic disc
Front Derailleur Shimano Ultegra, braze-on
Rear Derailleur Shimano Ultegra GS, 11-speed
Shift Levers Shimano Ultegra, 11-speed
Chain Shimano HG701, 11-speed
Cassette Shimano Ultegra HG800, 11-34t, 11-speed
Crankset Shimano Ultegra, BSA, 50/34t
Front Wheel Fulcrum Rapid Red 900, 12x100mm thru-axle, Center Lock
Rear Wheel Fulcrum Rapid Red 900, 10x142mm thru-axle, Center Lock
Front Tyre Vittoria Zaffiro Pro Bright Black, reflective, 700x30c, clincher
Rear Tyre Vittoria Zaffiro Pro Bright Black, reflective, 700x30c, clincher
Saddle Fizik Aliante Delta, S-alloy rails
Seatpost Cannondale 3 SmartSense, 6061 Alloy, 25.4 x 350mm (48 to 56cm frame size), 400mm (58 and 61cm frame size)
Pedals Available to be purchased separately
Accessories Turbo trainer compatible rear axle, SmartSense with Lights and Radar


Size 44 48 51 54 56 58 61
Rider Height (cm) 152 – 162 157 – 167 165 – 175 170 – 180 175 – 185 182 – 193 190 – 203
Rider Height (ft. in.) 5’0″ – 5’4″ 5’2″ – 5’6″ 5’5″ – 5’9″ 5’7″ – 5’11” 5’9″ – 6’1″ 6’0″ – 6’4″ 6’3″ – 6’8″
Seat Tube (ctr-top) 370 407 443 480 520 550 590
Seat Tube (ctr-ctr)
Effective Top Tube 505 517 531 547 561 579 604
Actual Top Tube
Seat Angle (°) 74.7 74.6 74.3 73.9 73.5 73 72.5
Head Tube Angle (°) 70.2 70.8 71.7 71.7 73 73 73
Head Tube Length 10.3 12.2 13.7 16.1 17.3 19.7 22.9
Fork Rake 60 60 55 55 45 45 45
Chainstay Length 410 410 410 410 410 410 410
Wheelbase 98.9 996 994 1008 995 1009 1028
Stack 510 530 550 570 590 610 640
Reach 365 371 377 382 386 393 402
Standover 68 71.2 74.2 77.3 80.4 83.3 86.8

All measurements in mm unless otherwise stated.

Size guide image
To speak to someone about this product please call 01332 841950 or email