Bike details
Overview
Key information split into simple groups.
Bike summary
-
-
Frame Aluminum -
Wheels 700c -
Groupset Tiagra, GRX 400 -
Suspension Rigid -
Drivetrain 2 × 10 -
Brakes Hydraulic Disc
Sizing
Recommended size guide.
50cm
160cm - 170cm
52cm
168cm - 178cm
54cm
176cm - 185cm
56cm
183cm - 193cm
58cm
190cm - 205cm
Parts list
Components
Main components, grouped by system.
Bike components
Frame
Frame
triple butted alloy 6061
Suspension Fork
AUTHOR carbon 1.5" tapered
Drivetrain
Rear Derailleur
SHIMANO Tiagra (20)
Front Derailleur
SHIMANO GRX 400
Shift Levers
SHIMANO GRX 400 (20)
Cassette
SHIMANO HG500-10, 11-34 (10)
Crank
FSA Gossamer Pro, 46-30 teeth, 172.5 / 175 mm cranks
Chain
KMC X10
Wheels
Front Hub
QUANDO Road Disc, 12 × 100 mm thru front axle, 32 holes
Rear Hub
QUANDO Road Disc, 12 × 100 mm thru front axle, 32 holes
Rims
JALCO SRD 21, 32 holes
Spokes
black stainless steel 2.0 mm
Tires
PANARACER Gravel King SK Sport 700 × 38c
Brakes
Brakes
SHIMANO RS305, kotou?ové mechanické (160 mm kotou?e)
Cockpit
Stem
AUTHOR alloy
Handlebar
PROMAX 420 / 440 / 460 mm
Seat
Saddle
AUTHOR Guru
Seatpost
AUTHOR alloy (27.2)
Fit data
Geometry
Numbers for sizing and ride feel.
| Size | 50cm | 52cm | 54cm | 56cm | 58cm |
|---|---|---|---|---|---|
| Stack Reach Ratio | 1.45 mm | 1.49 mm | 1.52 mm | 1.54 mm | 1.58 mm |
| Bottom Bracket Height | 279 mm | 279 mm | 280 mm | 281 mm | 281 mm |
| Front Center | 599 mm | 605 mm | 616 mm | 626 mm | 630 mm |
| Rake | 45 mm | 45 mm | 45 mm | 45 mm | 45 mm |
| Trail | 76 mm | 73 mm | 73 mm | 69 mm | 65 mm |
| Stack | 546 mm | 566 mm | 584 mm | 604 mm | 625 mm |
| Reach | 376 mm | 380 mm | 384 mm | 393 mm | 395 mm |
| Top Tube Length | 528 mm | 543 mm | 558 mm | 578 mm | 593 mm |
| Seat Tube Angle | 74.5 ° | 74 ° | 73.5 ° | 73 ° | 72.5 ° |
| Seat Tube Length | 500 mm | 520 mm | 540 mm | 560 mm | 580 mm |
| Head Tube Angle | 70.5 ° | 71 ° | 71 ° | 71.5 ° | 72 ° |
| Head Tube Length | 120 mm | 140 mm | 160 mm | 180 mm | 200 mm |
| Chainstay Length | 423 mm | 423 mm | 423 mm | 423 mm | 423 mm |
| Wheelbase | 1012 mm | 1018 mm | 1029 mm | 1040 mm | 1044 mm |
| Bottom Bracket Drop | 70 mm | 70 mm | 69 mm | 68 mm | 68 mm |
| Wheels | 700 | 700 | 700 | 700 | 700 |
| Rider Min Height | 160 cm | 168 cm | 176 cm | 183 cm | 190 cm |
| Rider Max Height | 170 cm | 178 cm | 185 cm | 193 cm | 205 cm |
Model Overview
Aura XR4 is an Author Aura model. 16 bikes variations carry this model name so far. Check out the entire range from 2023 of this model, by clicking this link.
Safety
Your safety is a top priority so always wear a helmet when you ride your bike. Moreover, wear the right clothing. You want to be visible to other drivers, so avoid wearing dark clothing.
Gravel bikes average price
Our math shows that the average cost of a dependable Gravel bike is 2462$. However, even if your budget is less than the average, you might still be able to get a top-quality Gravel bike. In short, before purchasing your ideal bike do some research about its components, and also check for reviews online.
Gravel bikes average weight
On a deeper look, we notice that the average weight of a Gravel bike is 8.45 kg (18.63 lbs). An easier bike will give you a big advantage in climbs. However, a heavier bike can gain speed when you descend.
With a weight of 10.6 kg (23.37 lbs), Author bike is much heavier than average. To sum up, it’s 25.44% heavier than the average weight of Gravel bikes.
Overview of components
Fork material
When it comes to the fork, this bike has a carbon one, so, it is super light and stiff. In conclusion, a carbon fork gives you great control when steering, and is also more forgiving.
Wheels size
The Aura XR4 2023 bike is equipped with 700c aluminum wheels when leaving the factory. These wheels are the most used kind for road bikes in general. However, while they give you great speed and control, these wheels are not so bump-friendly.
Brakes
When you want to stop the bike in time, the brakes are vital. The Aura XR4 has Hydraulic Disc brakes. Hydraulic disc brakes provide amazing stopping power, no matter what the terrain. To sum up, these are ideal for anyone.
Sizes
Author Aura XR4 bike has 5 sizes, in the range of 160 cm – 205 cm (5.25 ft – 6.73 ft). In conclusion, it won’t take much to find one that’s right for you.