Bike details
Overview
Key information split into simple groups.
Bike summary
-
-
Frame Aluminum -
Wheels 27.5" -
Travel Front 80mm -
Fork RST F1RST
-
Groupset SLX -
Suspension Hardtail -
Drivetrain 1 × 11 -
Brakes Hydraulic Disc
Sizing
Recommended size guide.
14"
140cm - 158cm
16"
155cm - 170cm
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 M5100-11, 11-51 (11)
Crank
PROWHEEL, 32 teeth, 165 / 170 mm cranks
Chain
KMC X11
Pedals
resin
Wheels
Front Hub
AUTHOR Xenon, 32 holes
Rear Hub
AUTHOR Xenon, 32 holes
Rims
AUTHOR Xenon TRC 27.5, 32 holes
Spokes
black stainless steel 2.0 mm
Tires
CST B-Trail aramid 27.5" × 2.25"
Brakes
Brakes
TEKTRO HD-M530, 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 (14") / Author Navigator (16")
Seatpost
AUTHOR alloy (31.6)
Fit data
Geometry
Numbers for sizing and ride feel.
| Size | 14" | 16" |
|---|---|---|
| Front Center | 636 mm | 651 mm |
| Rake | 43 mm | 43 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 | 170 cm |
About this model
Ultrasonic 27.5 is part of the Author Ultrasonic model. 15 bikes variations carry this model name so far. Take a sneak peek at all Author Ultrasonic bikes models from 2023, 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.
Road bikes average price
According to our math, the average price for a trustworthy Road bike is 365$. However, you could also get a good Road bike even if you pay a lower amount than the average price. As a general rule of thumb, you should always read reviews about the bike and its components before buying it to ensure you don’t pay too much.
Average weight for Road bikes
If we make a quick analysis of the average weight of a Road bike, we get 9.62 kg (21.21 lbs). It is a good advantage to have a lighter bike than the average. However, a heavier bike is more efficient on descents.
Author Ultrasonic 27.5 it’s weighing 11.5 kg (25.35 lbs). At this weight, is much heavier than average. In conclusion, the average Road bike weighs 19.54% less than Ultrasonic 27.5.
Ultrasonic 27.5 components
Fork
The fork installed on this bike is the RST F1RST model. The travel on this model is 80mm. Bike forks absorb the shocks and give you a smooth and pleasant ride. To sum it all, when buying a bike, ensure that you look for a fork capable of decent travel.
Wheels
The Ultrasonic 27.5 2023 bike is equipped with 27.5″ aluminum wheels when leaving the factory. The 27.5″ wheels are a great choice for smaller riders. However, the 27.5″ wheels are less forgiving than the 29″ wheels.
Brakes
We ride faster and faster, so a good braking system is essential on a bike nowadays. The Ultrasonic 27.5 comes with Hydraulic Disc brakes. Hydraulic disc brakes are perfect for mountain biking, road cycling, and commuting. To sum up, your safety is in good hands.
Sizes
Ultrasonic 27.5 comes in 2 sizes, that range from 140 cm – 170 cm (4.59 ft – 5.58 ft). In short, it won’t be difficult to find the right one for you.