Bicycle Archive · Specification report

2021 Cannondale Synapse Carbon 105

Velopedia Archive ID 900004747

Overview

Model year	2021
Brand	Cannondale
Model	Synapse Carbon 105
Bicycle type	Road
Archive ID	900004747
Colors	Mantis (MAT)
Sizes	48, 51, 54, 56, 58, 61

Frameset

Frame construction	BallisTec Carbon, Di2 ready, SAVE, BB30a, flat mount, 12x142mm thru axle, internal cable routing, removable fender bridge
Frame material	Carbon
Fork	BallisTec Full Carbon, integrated crown race, SAVE, size- specific design, 12x100mm thru-axle, internal routing

Drivetrain

Shifters	Shimano 105, 11-speed
Front derailleur	Shimano 105, braze-on
Rear derailleur	Shimano 105 GS
Crankset	Cannondale 1, BB30a, 50/34
Bottom bracket	Cannondale BB30
Rear cogs	Shimano 105, 11-34, 11-speed
Chain	Shimano HG601, 11-speed
Pedals	Not included

Brakes

Brakes	Shimano 105 hydraulic disc, 160/160mm RT64 rotors

Cockpit & contact points

Headset	Synapse Carbon, integrated, 1-1/8” - 1-1/8” (48 cm), 1-1/8” - 1-1/4” (51-54 cm), 1-1/8” - 1-3/8” (56-61 cm)
Handlebar	Cannondale 3, 6061 alloy, Compact
Stem	Cannondale 3, 6061 Alloy, 31.8, 7°
Saddle	Fabric Scoop Shallow Sport, steel rails
Seatpost	Cannondale 3, 6061 Alloy, 25.4 x 300mm (48- 51), 350mm (54-56), 400mm (58-61)

Wheels & tires

Hubs	(F) Formula CL-712, 12x100mm centerlock (R) Formula RXC-400, 12x142mm centerlock
Rims	Cannondale RD 2.0 Disc, double wall w/ eyelet, 28h
Spokes	Stainless Steel, 14g
Front tire	Vittoria Zaffiro Pro Bright Black, 700c x 30c, reflective
Rear tire	Vittoria Zaffiro Pro Bright Black, 700c x 30c, reflective
Wheel size	700c

Geometry · 48

Seat tube	407 mm
Effective top tube	517 mm
Head tube	122 mm
Head-tube angle	70.8°
Seat-tube angle	74.6°
Chainstay / rear center	410 mm
Wheelbase	996 mm
Bottom-bracket drop	75 mm
Bottom-bracket height	270 mm
Reach	371 mm
Stack	530 mm
Standover height	712 mm
Fork offset / rake	60 mm
Front center	598 mm
Trail	56 mm
Wheel size	700c

Geometry · 51

Seat tube	443 mm
Effective top tube	531 mm
Head tube	137 mm
Head-tube angle	71.7°
Seat-tube angle	74.3°
Chainstay / rear center	410 mm
Wheelbase	994 mm
Bottom-bracket drop	75 mm
Bottom-bracket height	270 mm
Reach	377 mm
Stack	550 mm
Standover height	742 mm
Fork offset / rake	55 mm
Front center	596 mm
Trail	56 mm
Wheel size	700c

Geometry · 54

Seat tube	480 mm
Effective top tube	547 mm
Head tube	161 mm
Head-tube angle	71.7°
Seat-tube angle	73.9°
Chainstay / rear center	410 mm
Wheelbase	1008 mm
Bottom-bracket drop	73 mm
Bottom-bracket height	272 mm
Reach	382 mm
Stack	570 mm
Standover height	773 mm
Fork offset / rake	55 mm
Front center	609 mm
Trail	56 mm
Wheel size	700c

Geometry · 56

Seat tube	520 mm
Effective top tube	561 mm
Head tube	173 mm
Head-tube angle	73°
Seat-tube angle	73.5°
Chainstay / rear center	410 mm
Wheelbase	995 mm
Bottom-bracket drop	73 mm
Bottom-bracket height	272 mm
Reach	386 mm
Stack	590 mm
Standover height	804 mm
Fork offset / rake	45 mm
Front center	596 mm
Trail	58 mm
Wheel size	700c

Geometry · 58

Seat tube	550 mm
Effective top tube	579 mm
Head tube	197 mm
Head-tube angle	73°
Seat-tube angle	73°
Chainstay / rear center	410 mm
Wheelbase	1009 mm
Bottom-bracket drop	70 mm
Bottom-bracket height	275 mm
Reach	393 mm
Stack	610 mm
Standover height	833 mm
Fork offset / rake	45 mm
Front center	609 mm
Trail	58 mm
Wheel size	700c

Geometry · 61

Seat tube	590 mm
Effective top tube	604 mm
Head tube	229 mm
Head-tube angle	73°
Seat-tube angle	72.5°
Chainstay / rear center	410 mm
Wheelbase	1028 mm
Bottom-bracket drop	70 mm
Bottom-bracket height	275 mm
Reach	402 mm
Stack	640 mm
Standover height	868 mm
Fork offset / rake	45 mm
Front center	627 mm
Trail	58 mm
Wheel size	700c

Manufacturer-published archive data. Confirm exact standards and dimensions before ordering parts or performing service. Generated by Velopedia on November 6, 2026.