Bike details
Overview
Key information split into simple groups.
Bike summary
-
-
Frame Aluminum -
Wheels 27.5" -
Travel Front 80mm -
Fork RST F1RST
-
Groupset SLX, Suntour -
Suspension Hardtail -
Drivetrain 1 × 11 -
Brakes Hydraulic Disc
Sizing
Recommended size guide.
14"
140cm - 158cm
16"
155cm - 173cm
Parts list
Components
Main components, grouped by system.
Bike components
Frame
Frame
triple butted hydroformed alloy 6061 27.5"
Suspension Fork
RST F1RST 27.5 air lock out (80 mm)
Drivetrain
Rear Derailleur
SHIMANO SLX
Shift Levers
SHIMANO SLX (11)
Cassette
SHIMANO M7000-11 11-46 (11)
Crank
SUNTOUR Zeron 32 teeth 160 / 170 mm cranks
Chain
SHIMANO HG601
Wheels
Front Hub
AUTHOR Xenon 32 holes
Rear Hub
AUTHOR Xenon 32 holes
Rims
AUTHOR Xenon Pro 27.5 32 holes
Spokes
stainless steel hi-ten 2.0 mm black
Tires
CST B-Trail kevlar 27.5" x 2.25"
Brakes
Brakes
PROMAX disc hydraulic (6" rotors)
Cockpit
Stem
AUTHOR alloy
Handlebar
AUTHOR Flat Top bar 9° 620 / 640 mm
Grips
AUTHOR kratton rubber
Seat
Saddle
AUTHOR Champion CR
Seatpost
AUTHOR alloy (31.6)
Fit data
Geometry
Numbers for sizing and ride feel.
| Size | 14" | 16" |
|---|---|---|
| Front Center | 636 mm | 651 mm |
| Rake | 73 mm | 73 mm |
| Top Tube Length | 557 mm | 582 mm |
| Seat Tube Angle | 74 ° | 73.5 ° |
| Seat Tube Length | 356 mm | 406 mm |
| Head Tube Angle | 69 ° | 69.5 ° |
| Head Tube Length | 110 mm | 115 mm |
| Chainstay Length | 427 mm | 427 mm |
| Wheelbase | 1059 mm | 1074 mm |
| Bottom Bracket Drop | 45 mm | 45 mm |
| Wheels | 27" | 27" |
| Rider Min Height | 140 cm | 155 cm |
| Rider Max Height | 158 cm | 173 cm |
Model Overview
Ultrasonic 27.5 is an Author Ultrasonic model. Author released 15 bikes variations of this model so far. You can get a glimpse at all models from 2020, by clicking on this link.
Safety
Make sure you wear a helmet on every ride, and that your bike performs well. In short, this means checking the tires, brakes, and chain to make sure everything is in good working order.
Road bikes average price
If you want an acceptable Road bike you should know that the average price is 365$. However, paying less money than this amount doesn’t mean that you couldn’t get a great Road bike. To make sure you don’t pay a higher amount than normal for your bike, always do some components analysis and read reviews.
Average weight for Road bikes
Road bikes have an average weight of 11.29 kg (24.89 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.
Author Ultrasonic 27.5 it’s weighing 11.5 kg (25.35 lbs). At this weight, is slightly heavier than average. In short, the average Road bike weight is 1.86% lower than this one.
Ultrasonic 27.5 components
Fork
Author Ultrasonic 27.5 2020 bike is equipped with the RST F1RST fork, and has 80mm travel. Bike forks are good shock absorbers and provide a smooth ride and a great experience. In short, make sure you choose one with a decent fork when you purchase your dream bike.
Wheels size
When it comes to wheels, the Ultrasonic 27.5 bike is equipped with the 27.5″ aluminum model. 27.5″ wheels are a mixture between 29″ wheels and 26″ wheels. However, the 27.5″ wheels are less forgiving than the 29″ wheels.
Brakes
For your safety, it is important to have quality breaks on your bike. Author Ultrasonic 27.5 has Hydraulic Disc brakes installed. These kinds of brakes are among the most popular models used on bikes. To sum up, these are ideal for anyone.
Sizes
Ultrasonic 27.5 comes in 2 sizes, that range from 140 cm – 173 cm (4.59 ft – 5.68 ft). In short, it won’t be difficult to find the right one for you.