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.
48cm
152cm - 162cm
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 legs, alloy steerer 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
SHIMANO GRX 600 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
Handlebar
PROMAX 420 / 440 / 460 mm
Seat
Saddle
AUTHOR Guru
Seatpost
AUTHOR (27.2)
Fit data
Geometry
Numbers for sizing and ride feel.
| Size | 48cm | 50cm | 52cm | 54cm | 56cm | 58cm |
|---|---|---|---|---|---|---|
| Stack Reach Ratio | 1.43 mm | 1.46 mm | 1.49 mm | 1.52 mm | 1.54 mm | 1.59 mm |
| Bottom Bracket Height | 278 mm | 279 mm | 279 mm | 280 mm | 281 mm | 281 mm |
| Front Center | 587 mm | 599 mm | 605 mm | 616 mm | 626 mm | 630 mm |
| Rake | 45 mm | 45 mm | 45 mm | 45 mm | 45 mm | 45 mm |
| Trail | 76 mm | 76 mm | 73 mm | 73 mm | 69 mm | 65 mm |
| Stack | 525 mm | 543 mm | 563 mm | 581 mm | 601 mm | 622 mm |
| Reach | 368 mm | 373 mm | 377 mm | 381 mm | 390 mm | 392 mm |
| Top Tube Length | 510 mm | 525 mm | 540 mm | 555 mm | 575 mm | 590 mm |
| Seat Tube Angle | 75 ° | 74.5 ° | 74 ° | 73.5 ° | 73 ° | 72.5 ° |
| Seat Tube Length | 480 mm | 500 mm | 520 mm | 540 mm | 560 mm | 580 mm |
| Head Tube Angle | 70.5 ° | 70.5 ° | 71 ° | 71 ° | 71.5 ° | 72 ° |
| Head Tube Length | 100 mm | 120 mm | 140 mm | 160 mm | 180 mm | 200 mm |
| Chainstay Length | 420 mm | 420 mm | 420 mm | 420 mm | 420 mm | 420 mm |
| Wheelbase | 997 mm | 1009 mm | 1015 mm | 1026 mm | 1037 mm | 1041 mm |
| Bottom Bracket Drop | 71 mm | 70 mm | 70 mm | 69 mm | 68 mm | 68 mm |
| Wheels | 700 | 700 | 700 | 700 | 700 | 700 |
| Rider Min Height | 152 cm | 160 cm | 168 cm | 176 cm | 183 cm | 190 cm |
| Rider Max Height | 162 cm | 170 cm | 178 cm | 185 cm | 193 cm | 205 cm |
Model Overview
Aura XR4 belongs to the Author Aura model. There are 16 bikes that carry this model name. You can get a glimpse at all models from 2022, by clicking on this link.
Safety
When you go for a ride, don’t forget to put your helmet on. Moreover, ride with traffic, not against it. This will help you stay visible to drivers and also makes it easier for them to see you.
Gravel bikes average price
According to our math, the average price for a trustworthy Gravel bike is 2462$. However, you could also get a good Gravel bike even if you pay a lower amount than the average price. In conclusion, always check bike reviews and their components before making a purchase to make sure you don’t overpay.
Gravel bikes average weight
Gravel bikes have an average weight of 8.13 kg (17.92 lbs). You will have a greater advantage on climbs if your bike is easier than the average. On descents, however, a heavier bike will give you extra speed.
Aura XR4 weighs 10.8 kg (23.81 lbs) and is much heavier than the average. To sum up, it’s 32.84% heavier than the average weight of Gravel bikes.
Overview of components
Fork material
The fork is made out of carbon, so, its weight is considerably lighter than one made out of steel. However, they cost a bit more than steel forks.
Wheels
When it comes to wheels, the Aura XR4 bike is equipped with the 700c aluminum model. 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
Stopping the bike when needed, it’s essential for your safety. This bike has Hydraulic Disc brakes. Hydraulic disc brakes are perfect for mountain biking, road cycling, and commuting. To sum up, these are ideal for anyone.
Sizes
Aura XR4 comes in 6 sizes, that range from 152 cm – 205 cm (4.99 ft – 6.73 ft). In short, you can easily find one that suits you.