Cannondale Synapse Carbon 2 2025 Grey Road Bike

Available with Cannondale in the sizes shown above. Expect delivery within 3-4 working days of placing an order.

Go long, go short, go fast. This is WorldTour performance for real world rides.

Smooth. Precise. And built to stay that way. Synapse Carbon 2 Di2 pairs an endurance-optimised carbon frame with Shimano’s peerless Ultegra Di2 shifting and the race-bred Reserve 42|49 wheelset. Designed for the rider who appreciates the feel of a fast bike built to go the distance—and the silence of a drivetrain that’s always in the right gear. Add in massive tire clearance and sleek integration, and it’s clear: this thing’s more than ready.

Lightweight, smoothly compliant, sleekly aero Synapse carbon frameset with StashPort downtube storage

Ultegra Di2 – Effortlessly accurate shifting from Shimano’s penultimate electronic 12-speed drivetrain

DT Swiss carbon road wheels – lightweight all-road capability

Cannondale C1 Aero 27 Carbon seatpost – speed meets comfort

Fizik Vento Argo R5 saddle – ergonomic comfort with pressure relieving cutout

Specification

Frame	Synapse Carbon, Proportional Response construction, integrated cable routing, downtube Stashport, 12×142 thru-axle, UDH, BSA 68mm threaded BB, flat mount disc, integrated seat binder, SmartSense Gen 2.0 compatible, fender mounts
Fork	Synapse Carbon, integrated crown race, 12×100mm thru-axle, flat mount disc, internal routing, 1-1/8” to 1-1/5” Delta steerer, 55mm offset, fender mounts
Headset	Integrated, 1-1/8” – 1-1/2”
Rear Derailleur	Shimano Ultegra Di2 R8150
Front Derailleur	Shimano Ultegra Di2 R8150
Shifters	Shimano Ultegra Di2 R8170, wireless, 12-speed
Chain	Shimano Ultegra, 12-speed
Crank	Shimano Ultegra R8100, 50/34
Cassette	Shimano Ultegra R8100, 11-34, 12-speed
Bottom Bracket	Shimano BSA 68
Brakes	Shimano Ultegra R8170, 160/160mm CL800 rotors
Brake Levers	Shimano Ultegra Di2 R8170 hydraulic disc
Rims	DT Swiss ERC 45, carbon, 24mm inner width, 45mm depth, 24h, tubeless ready
Spokes	DT Swiss Competition
Hubs	(F) DT Swiss 370, 12×100mm centerlock / ® DT Swiss 370, 12×142mm centerlock
Tyres	Vittoria Rubino Pro IV, 700×32c
Handlebar	Vision Trimax Aero Alloy
Stem	Cannondale C1 Conceal, Alloy, 31.8, -6°
Bar Tape	Fizik Tempo Bondcush Soft, 3mm
Saddle	Fizik Vento Argo X5, 140m
Seatpost	Cannondale C1 Aero 27 Carbon, SmartSense compatible, 330mm length, 0mm offset (44-48cm), 15mm offset (51-61cm)
Extras	Large StashBag downtube storage bag,tubeless valves

Specifications are subject to change without notice

Size Guide

Frame Size	Minimum Height	Maximum Height
44	152cm (5’0”)	162cm (5’4”)
48	157cm (5’2”)	167cm (5’6”)
51	165cm (5’5”)	175cm (5’9”)
54	170cm (5’7”)	180cm (5’11”)
56	175cm (5’9”)	185cm (6’1”)
58	182cm (6’0”)	193cm (6’4”)
61	190cm (6’3”)	1203cm (6’8”)

We have developed our size guide from our selling experience and it may differ from the manufacturers guide. Please note, this is only a guide and if you have any concerns over sizing please get in contact

Geometry

Frame Size	44	48	51	54	56	58	61
A – Seat Tube Length cm	40.7	40.7	44.3	48.0	52.0	55.0	59.0
B – Top Tube Horizontal cm	52.2	53.3	54.4	55.5	56.7	58.0	59.8
C – Top Tube Actual cm	47.8	48.6	49.7	50.9	52.3	53.7	55.6
D – Head Tube Angle	69.8°	70.9°	71.3°	71.3°	71.3°	71.3°	71.3°
E – Seat Tube Angle	73.0°	73.0°	73.0°	73.0°	73.0°	73.0°	73.0°
F – Standover cm	71.4	72.2	75.2	78.5	81.5	84.3	87.8
G – Head Tube Length cm	9.1	10.8	12.7	15.0	17.1	19.6	22.7
H – Wheelbase cm	100.3	100.5	101.3	102.6	104.4	105.8	107.7
I – Front Center cm	58.9	59.2	60.0	61.2	62.4	63.8	65.7
J – Chain Stay Length	42.5	42.5	42.5	42.5	43.0	43.0	43.0
K – Bottom Bracket Drop cm	7.5	7.5	7.5	7.3	7.3	7.0	7.0
L – Bottom Bracket Heigh cm	27.8	27.8	27.8	28.0	28.0	28.3	28.3
M – Fork Rake cm	5.5	5.5	5.5	5.5	5.5	5.5	5.5
N – Trail cm	7.1	6.4	6.1	6.1	6.1	6.1	6.1
0 – Stack cm	51.0	53.0	55.0	57.0	59.0	61.0	64.0
P – Reach cm	36.6	37.1	37.6	38.1	38.7	39.3	40.2
Q – Axle to Crown cm	39.3	39.3	39.3	39.3	39.3	39.3	39.3

Want to compare the size of your current bike to this one? Read our Reach and Stack guide here.