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 Mechanical Disc
Sizing
Recommended size guide.
50cm
160cm - 170cm
52cm
168cm - 178cm
54cm
176cm - 188cm
56cm
186cm - 195cm
58cm
193cm - 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
Front Derailleur
SHIMANO GRX 400
Shift Levers
SHIMANO Tiagra (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 CR25D 32 holes
Spokes
stainless steel hi-ten 2.0 mm black
Tires
RITCHEY Cross Shield kevlar 700 × 35c
Brakes
Brakes
SHIMANO RS305 disc mechanical (160 mm rotors)
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 | 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 | 68 mm | 68 mm | 68 mm | 68 mm | 68 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 | 186 cm | 193 cm |
| Rider Max Height | 170 cm | 178 cm | 188 cm | 195 cm | 205 cm |
About this model
Aura XR4 completes the Author Aura model. Author launched 16 bikes of this model so far. Take a sneak peek at all Author Aura bikes models from 2020, by clicking here.
Safety
When cycling always take safety very seriously. Wear a helmet, obey the traffic rules and wear hi-vis clothes. In short, take care of yourself so others can take care of you.
Average price for Gravel bikes
If you want an acceptable Gravel bike you should know that the average price is 2462$. However, this doesn’t mean that if you spend less money on a Gravel bike, you couldn’t get a decent one. To sum up, when you purchase your bike, make sure to check if it has reviews, and also do some components research.
Average weight for Gravel bikes
The average weight for Gravel bikes is 8.13 kg (17.92 lbs). Having an easier bike than average will give you a great advantage on climbs. However, a heavier bike will gain more speed on descends.
With a weight of 10.7 kg (23.59 lbs), Author bike is much heavier than average. In short, the average Gravel bike weight is 31.61% lower than this one.
Aura XR4 components
Fork material
When it comes to the fork, this bike has a carbon one, so, it’s a great addition to the bike’s value. However, carbon forks should be regularly inspected for damage because even the smallest crack could cause the fork to fall apart.
Wheels size
As for the wheels, Author Aura XR4 2020, has a 700c aluminum model. These are the most popular wheels for road, aero, gravel, cyclocross, race, and gravel bikes. However, these wheels don’t perform so well when passing over obstacles.
Brakes
For your safety, it is important to have quality breaks on your bike. Author Aura XR4 has Mechanical Disc brakes installed. They are much easier to maintain than hydraulic disk brakes. However, performance-wise there is room for improvement.
Sizes
Author Aura XR4 bike has 5 sizes, in the range of 160 cm – 205 cm (5.25 ft – 6.73 ft). In short, it won’t be difficult to find the right one for you.