Inspection
Frame condition
Inspect the frame, fork, welds, and high-stress areas for cracks, dents, or prior repairs.
Cannondale
2021 Cannondale Synapse Hi-MOD GRX Di2
Value Guide market data · 2021 Cannondale Synapse Hi-MOD GRX Di2
12-month trend
8%
Direction and magnitude, not judgment
vs. category average
— %
No category comparison available
Price over time - 2021 Cannondale Synapse Hi-MOD GRX Di2
Values based on actual sales data. Enter your bike's specifics to get a precise valuation.
All Synapse model years
2025$15,344 - $17,819▲ 110% vs. 2021
2024$5,162 - $5,994▼ 30% vs. 2021
2023$1,934 - $2,246▼ 74% vs. 2021
2022$8,417 - $9,774▲ 15% vs. 20212021$7,324 - $8,505Currently viewing
2020$9,300 - $10,800▲ 27% vs. 2021
2019$9,765 - $11,340▲ 33% vs. 2021
2018$9,300 - $10,800▲ 27% vs. 2021
2017$7,440 - $8,640▲ 2% vs. 2021
2016$8,370 - $9,720▲ 14% vs. 2021
2015$8,565 - $9,947▲ 17% vs. 2021
2014$7,552 - $8,770▲ 3% vs. 2021
2013$7,161 - $8,316▼ 2% vs. 2021
2012$6,045 - $7,020▼ 17% vs. 2021
2011$5,952 - $6,912▼ 19% vs. 2021
2010$7,905 - $9,180▲ 8% vs. 2021
2009$6,417 - $7,452▼ 12% vs. 2021
2008$4,464 - $5,184▼ 39% vs. 2021
2007$3,906 - $4,536▼ 47% vs. 2021
2006$3,999 - $4,644▼ 45% vs. 20212021 Synapse Hi-MOD GRX Di2 lineup
Overview
About this bike
2021 Cannondale Synapse Hi-MOD GRX Di2 value depends on condition, original build, frame material, service history, and current buyer demand.
Specifications
Frameset
- Fork
- BallisTec Hi-MOD Full Carbon, integrated crown race, SAVE, size-specific design, 12 x 100mm thru-axle, internal routing
- Frame
- Hi-MOD Carbon, Di2 ready, SAVE, BB30a, flat mount, 12 x 142mm thru axle, internal cable routing, removable fender bridge
Drivetrain
- Groupset
- Shimano Ultegra
- Bottom Bracket
- Cannondale BB30
- Cassette
- Shimano Ultegra HG800, 11-34T, 11-speed
- Chain
- Shimano HG701, 11-speed
- Crankset
- HollowGram, BB30a, OPI SpideRing, 50/34
- Front Derailleur
- Shimano GRX 815, Di2, braze-on
- Rear Derailleur
- Shimano GRX 815, Di2, Shadow RD+
- Shifters
- Shimano GRX 815, Di2, 11-speed
Brakes
- Brake Levers
- Shimano Ultegra GRX Di2 hydraulic disc
- Brakes
- Shimano Ultegra GRX Di2 hydraulic disc, 160/160mm RT800 rotors
Cockpit
- Handlebar
- HollowGram SAVE SystemBar, Carbon, 8 deg. pitch adjust
- 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)
- Saddle
- Fabric Scoop Shallow Pro, carbon rails
- Seatpost
- HollowGram SAVE Carbon, 25.4 x 350mm (44-56), 400mm (58-61)
- Stem
- HollowGram SAVE, Alloy, -6°
- Grips
- Cannondale Bar Tape, 3.5mm
Wheels & Tires
- Front Tire
- WTB Exposure, 700 x 30c
- Hubs
- Front: HollowGram KNØT, sealed bearing 12 x 100mm centerlock, Rear: HollowGram KNØT, 12 x 142mm Centerlock w/DT Swiss internals
- Rims
- HollowGram 45 SL KNØT, Carbon, 20h front, 24h rear, 45mm deep, 21mm IW, tubeless ready
- Spokes
- DT Swiss Aerolite, straight-pull
Pedals
- Pedals
- Sold separately
Accessories
- Accessories & Extras
- Removable fender bridge
Frame sizing
XS4'10"-5'2"
S5'2"-5'6"
M5'6"-5'10"
L5'10"-6'2"
XL6'2"-6'6"
M highlighted as most common resale size. Sourced from catalog metadata.
Geometry
- Stack
- Varies by size
- Reach
- Varies by size
- Wheelbase
- Varies by size
Industry standard. Sourced from catalog metadata.
What to check when buying used
Inspection
Drivetrain wear
Check chain stretch, cassette teeth, chainrings, and shifting under load before negotiating price.
Inspection
Wheel condition
Inspect rims, hubs, spokes, and bearing play; ask about the tire age and any prior wheel rebuilds.
Inspection
Service history
Ask for service records covering bearings, brakes, drivetrain, and any frame or fork warranty work.
Inspection
Carbon inspection
Tap test the frame, fork, seatpost, and bars for cracks; verify no impact damage near dropouts.
Inspection
Brake hoses & cables
Check hydraulic line bleed, cable housing wear, and confirm rotors are within spec.