Inspection
Frame condition
Inspect the frame, fork, welds, and high-stress areas for cracks, dents, or prior repairs.
Opus
2021 Opus Horizon AL 105-GRX
Value Guide market data · 2021 Opus Horizon AL 105-GRX
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All Horizon model years
2021 Horizon AL 105-GRX lineup
Overview
About this bike
2021 Opus Horizon AL 105-GRX value depends on condition, original build, frame material, service history, and current buyer demand.
Specifications
Frameset
- Fork
- Full carbon tapered 1-1/2 to 1-1/8 in
- Frame
- Meta 30 aluminum
Drivetrain
- Groupset
- Shimano 105
- Bottom Bracket
- FSA sealed BSC threaded
- Cassette
- Shimano 11-34
- Chain
- Shimano HG11
- Chainrings
- 48-32T
- Crankset
- FSA Omega Adventure
- Front Derailleur
- Shimano 105 R7000
- Rear Derailleur
- Shimano GRX-810
- Shifters
- Shimano 105 R7000 2 x 11
Brakes
- Brake Levers
- Shimano 105 R7000
- Brakes
- Promax Decode R Flat Mount twin piston disc
Cockpit
- Handlebars
- X-Race Aero 16° flare
- Headset
- FSA Orbit integrated sealed
- Saddle
- Selle Italia X3 XP Keramid
- Seatpost
- Promax alloy 27.2 x 300
- Stem
- Promax
- Grips
- Velo VexGel diamond grip
Wheels & Tires
- Hubs
- Alex Bear Pawls through axle 12 mm fr/rr
- Rims
- Weinmann U28TL
- Tires
- Kenda Flintridge Pro 700c x 35 CSK
Pedals
- Pedals
- Sold separately
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.