Opus Horizon 105 GRX

Name: Opus Horizon 105 GRX
Brand: Opus

2024 RoadGravel Manufacturer page

Suspension: Rigid
Wheels: 700c
Drivetrain: 2 × 11 32–48t / 11–34t
Gear range: 464%
Weight: 10.34 kg 22.8 lb · Reference configuration not specified
Frame: Aluminum
Brakes: Hydraulic disc

Sizes

Size guide

The manufacturer did not publish rider heights for these sizes.

Components

17 of 19 identified

Parts found in a manufacturer catalog show their brand, model and key numbers, and the steps show how precisely they are identified: brand, series, model, or the exact product. The info button has every detail and the text the manufacturer published.

Frame and fork

1 part

Frame

Meta 30 Alloy Not identified

Suspension

1 part

Fork

Full carbon tapered 1-1/2 to 1-1/8 in Not identified

Drivetrain

6 parts

Bottom bracket
- FSA
Cassette
- Shimano
Chain
- Shimano
Crankset
- FSA Omega
Rear derailleur
- Shimano GRX RD-RX810 11 speeds
RD-RX810GRX-810
Shifters
- Shimano 105 ST-R7000
ST-R7000

Brakes

2 parts

Wheels and tires

4 parts

Cockpit and contact points

6 parts

Sizes and geometry

6 sizes Open in the geometry plotter

Complete rider-height ranges are not published for these sizes. You can still explore the geometry below.

Size SM

Table

Geometry diagram unavailable

The drawing needs wheelbase, which the manufacturer did not publish. Available facts remain in the table.

Size Reach Stack

Complete manufacturer geometry table 6 published sizes

Complete manufacturer geometry by size
Measurement
Frame
Reachmm	372	376	380	384	392	400
Stackmm	534	553	572	590	610	630
Top tube lengthmm	515	530	544	559	578	599
Seat tube lengthmm	420	450	480	510	545	580
Head tube lengthmm	113	133	153	173	193	213
Head tube angle	69.75°	70.5°	71°	71.5°	72°	72.5°
Seat tube angle	75°	74.5°	74°	73.5°	73°	72.5°
Chainstay lengthmm	425	425	427	427	429	429
Bottom bracket dropmm	80	78	76	74	73	72
Bottom bracket heightmm	269	271	273	275	276	277
Standover heightmm	718	743	766	791	818	847
Stack/reach ratio	1.44	1.47	1.51	1.54	1.56	1.58
Suspension and parts
Crank lengthmm	165	170	172.5	172.5	172.5	175
Handlebar widthmm	380	400	420	420	440	460
Stem lengthmm	70	80	90	100	110	110

Not published by the manufacturer: Wheelbase, Front center, Fork rake, Trail, Front travel, Rear travel, Stem angle, Seatpost length and Dropper post travel.

Specifications

Frame and fork

Intended fit: Unisex
Frame material: Aluminum
Fork material: Carbon
Bicycle weight: 10.34 kg

22.8 lb

Suspension

Suspension configuration: Rigid

Drivetrain

Derived by Bikelake

Front chainrings: 2
Smallest chainring: 32
Largest chainring: 48
Rear sprockets: 11
Smallest sprocket: 11
Largest sprocket: 34
Lowest gear: 27.3 in
Highest gear: 126.6 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

Bottom bracket standard: BSA
Tire clearance: Maximum tire width: 45c
Tire width: 35c
Wheel material: Aluminum
Wheel size: 700c

Technical analysis

3 measures

How these figures sit among bicycles of the same class and model year. Context, not a ranking.

Lowest gear

27.3 gear inches

This value is within the central range for this class.

Cohort: Road / Gravel Model year: 2024
Sample: 1,719 bicycles with this information
Coverage: 76.6% of the class

Highest gear

126.6 gear inches

This value is above the central range for this class.

Cohort: Road / Gravel Model year: 2024
Sample: 1,719 bicycles with this information
Coverage: 76.6% of the class

Shifting

Mechanical

772 of 2,241 bicycles with this information use electronic shifting.

Cohort: Road / Gravel Model year: 2024
Sample: 2,241 bicycles with this information
Coverage: 99.9% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 10.5 km/h
Highest gear: 48.5 km/h

Total gear range 464%

Technical details and class reference

These speeds describe the gearing at the selected cadence, not how fast you can ride.
Calculated from published gear-inch values and their wheel-size assumptions.
These gearing values describe the bicycle, not a selected frame size.
A 100% range means one ratio; 500% means the highest ratio is five times the lowest.
For e-bikes, motor assistance cutoff is not represented.

Gear-inch range

Lower gear-inch values travel less distance per pedal revolution; higher values travel farther.

This bicycle: 27.3–126.6 gear inches
Class reference (p10–p90): 23.2–131.8 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Road / Gravel Model year: 2024
Lowest gear: 1719 bicycles with this information, 76.6% of the class
Highest gear: 1719 bicycles with this information, 76.6% of the class

Lineup changes

The published facts that differ across this family's builds and from the same model a year earlier. Missing information never counts as zero.

Differences across 2024 builds
Specification	This bicycle Opus Horizon 105 GRX	Opus Horizon Claris	Opus Horizon GRX 12	Opus Horizon QR
Frame
Fork material	Carbon	Carbon	Carbon	Steel
Bicycle weight	10.34 kg	10.7 kg	10.16 kg	12.07 kg
Drivetrain
Smallest chainring	32	32	30	32
Largest chainring	48	48	46	48
Rear sprockets	11	8	12	8
Largest sprocket	34	32	34	32
Lowest gear	27.3 in	29.0 in	25.6 in	29.0 in
Highest gear	126.6 in	126.6 in	121.3 in	126.6 in
Brakes
Brake type	Hydraulic disc	Hydraulic disc	Hydraulic disc	Mechanical disc
Other specifications
Bottom bracket standard	BSA	BSA	Not informed	BSA
Tire clearance	Maximum tire width: 45c	Maximum tire width: 45c	Maximum tire width: 45c	Maximum tire width: 40c