Author Aura XR7

2025 RoadGravel Manufacturer page

Suspension: Rigid
Wheels: 700c
Drivetrain: 1 × 12 42t / 10–51t
Gear range: 510%
Weight: 9.9 kg 21.8 lb · Reference configuration not specified
Frame: Aluminum
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

48cm 153–162
50cm 160–170
52cm 168–178
54cm 176–185
56cm 183–193
58cm 190–205

Components

16 of 17 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

triple butted alloy 6061, max tyre size 700 × 42C Not identified

Suspension

1 part

Fork
- Author

Drivetrain

5 parts

Cassette
- Shimano SLX CS-M7100-12 12 speeds
CS-M7100-12
Chain
- KMC
Crankset
- Shimano GRX FC-RX820 12 speeds
FC-RX820
Rear derailleur
- Shimano GRX RD-RX822 12 speeds
RD-RX822
Shifters
- Shimano GRX ST-RX610
ST-RX610

Brakes

1 part

Brakes
- Shimano GRX BR-RX400
BR-RX400

Wheels and tires

5 parts

Cockpit and contact points

4 parts

Sizes and geometry

6 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size 52cm

Table

Reach 381mm

Stack 588mm

Wheelbase 1037mm

Head angle 71.0°

Seat angle 74.0°

Every size is drawn to the same scale, in millimeters. Explanatory schematic on an assumed 700c wheel; exact published values are in the table below.

Size Reported by the manufacturer

Complete manufacturer geometry table 6 published sizes

Complete manufacturer geometry by size
Measurement
Reachmm	364	371	381	392	402	409
Stackmm	562	572	588	601	617	638
Top tube lengthmm	520	530	550	570	590	610
Seat tube lengthmm	480	500	520	540	560	580
Head tube lengthmm	125	135	150	165	180	200
Head tube angle	70°	70.5°	71°	71°	71.5°	72°
Seat tube angle	74.5°	74.5°	74°	73.5°	73°	72.5°
Chainstay lengthmm	435	435	435	435	435	435
Wheelbasemm	1020	1026	1037	1052	1062	1071
Front centermm	595	601	612	626	636	645
Bottom bracket dropmm	71	70	70	69	68	68
Bottom bracket heightmm	278	279	279	280	281	281
Fork rakemm	45	45	45	45	45	45
Trailmm	79	76	72	73	70	66
Stack/reach ratio	1.54	1.54	1.54	1.53	1.54	1.56

Not published by the manufacturer: Standover height, Front travel, Rear travel, Crank length, Handlebar width, Stem length, Stem angle, Seatpost length and Dropper post travel.

Specifications

Frame and fork

Intended fit: Unisex
Frame material: Aluminum
Fork material: Carbon
Bicycle weight: 9.9 kg

21.8 lb

Suspension

Suspension configuration: Rigid

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 42
Largest chainring: 42
Rear sprockets: 12
Smallest sprocket: 10
Largest sprocket: 51
Lowest gear: 23.9 in
Highest gear: 121.8 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

Tire width: 40c
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

23.9 gear inches

This value is below the central range for this class.

Cohort: Road / Gravel Model year: 2025
Sample: 1,536 bicycles with this information
Coverage: 76.6% of the class

Highest gear

121.8 gear inches

This value is within the central range for this class.

Cohort: Road / Gravel Model year: 2025
Sample: 1,536 bicycles with this information
Coverage: 76.6% of the class

Shifting

Mechanical

688 of 1,999 bicycles with this information use electronic shifting.

Cohort: Road / Gravel Model year: 2025
Sample: 1,999 bicycles with this information
Coverage: 99.7% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 9.1 km/h
Highest gear: 46.7 km/h

Total gear range 510%

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: 23.9–121.8 gear inches
Class reference (p10–p90): 22.8–126.6 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Road / Gravel Model year: 2025
Lowest gear: 1536 bicycles with this information, 76.6% of the class
Highest gear: 1536 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 2025 builds

Differences across 2025 builds
Specification	This bicycle Author Aura XR7	Author Aura XR2	Author Aura XR3	Author Aura XR4	Author Aura XR5	Author Aura XR6
Frame
Fork material	Carbon	Aluminum	Aluminum	Carbon	Carbon	Carbon
Bicycle weight	9.9 kg	10.9 kg	11.4 kg	10.8 kg	10.4 kg	10 kg
Drivetrain
Front chainrings	1	2	2	2	2	2
Smallest chainring	42	32	32	30	30	30
Largest chainring	42	48	48	46	46	46
Rear sprockets	12	9	9	10	11	12
Smallest sprocket	10	11	11	11	11	11
Largest sprocket	51	32	32	34	34	36
Lowest gear	23.9 in	29.0 in	29.0 in	25.6 in	25.6 in	24.2 in
Highest gear	121.8 in	126.6 in	126.6 in	121.3 in	121.3 in	121.3 in
Brakes
Brake type	Hydraulic disc	Hydraulic disc	Mechanical disc	Mechanical disc	Hydraulic disc	Hydraulic disc
Other specifications
Tire width	40c	38c	38c	38c	38c	40c