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 | 550 mm | 575 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 | 420 mm | 420 mm |
| Wheelbase | 1052 mm | 1067 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 |
Model Overview
Ultrasonic 27.5 completes the Author Ultrasonic model. Author released 18 bikes variations of this model so far. Check out the entire range from 2024 of this model, by clicking 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.
Average price for Road bikes
If you want to purchase a solid Road bike, it is important to know that the average cost is 365$. However, even if your budget is less than the average, you might still be able to get a top-quality Road bike. In short, before purchasing your ideal bike do some research about its components, and also check for reviews online.
Road bikes average weight
Road bikes weigh an average of 11.29 kg (24.89 lbs). It is a good advantage to have a lighter bike than the average. However, a heavier bike is more efficient on descents.
slightly heavier than average, Ultrasonic 27.5 has a weight of 11.5 kg (25.35 lbs). In conclusion, the average Road bike weighs 1.86% less than Ultrasonic 27.5.
Ultrasonic 27.5 components
Fork
Author Ultrasonic 27.5 2024 bike is equipped with the RST F1RST fork, and has 80mm travel. Bike forks absorb the shocks and give you a smooth and pleasant ride. In conclusion, always look for a fork with decent travel when you buy a bike.
Wheels
When leaving the production line, the Ultrasonic 27.5 model has 27.5″ aluminum wheels. These wheels will provide you with more control over the bike. However, these wheels have a slower top speed if you compare them to 29″ wheels.
Brakes
When you want to stop the bike in time, the brakes are vital. The Ultrasonic 27.5 has Hydraulic Disc brakes. These kinds of brakes are among the most popular models used on bikes. To sum up, you can ride your bike with confidence.
Sizes
There are 2 sizes available for this model. Rider height can be anywhere between 140 cm – 170 cm (4.59 ft – 5.58 ft). In conclusion, it won’t take much to find one that’s right for you.