Bike details
Overview
Key information split into simple groups.
Bike summary
-
Category -
Frame Aluminum -
Wheels 27.5" -
Travel Front 100mm -
Fork RST GILA
-
Groupset Altus, Tourney -
Suspension Hardtail -
Drivetrain 3 × 8 -
Brakes Hydraulic Disc
Sizing
Recommended size guide.
15"
145cm - 158cm
17"
155cm - 172cm
19"
170cm - 185cm
Parts list
Components
Main components, grouped by system.
Bike components
Frame
Frame
alloy 6061 27.5"
Suspension Fork
RST Gila 27.5 ML lock out (100 mm)
Drivetrain
Rear Derailleur
SHIMANO Altus
Front Derailleur
SHIMANO TY700 (34.9)
Shift Levers
SHIMANO Altus (24)
Cassette
SHIMANO HG200-8, 12-32 (8)
Crank
PROWHEEL, 42-34-24 teeth, 170 / 175 mm cranks
Chain
KMC Z8.3
Pedals
resin
Wheels
Front Hub
QUANDO Disc, 32 holes
Rear Hub
QUANDO Disc, 32 holes
Rims
AUTHOR Xenon 27.5, 32 holes
Spokes
black steel
Tires
AUTHOR Rocket 27.5" × 2.10"
Brakes
Brakes
TEKTRO HD-M275, disc hydraulic (6" rotors)
Cockpit
Stem
AUTHOR alloy
Handlebar
AUTHOR rise 15 mm, 9°, 660 / 680 mm
Grips
AUTHOR kratton rubber
Seat
Saddle
AUTHOR Courier
Seatpost
AUTHOR alloy (31.6)
Fit data
Geometry
Numbers for sizing and ride feel.
| Size | 15" | 17" | 19" |
|---|---|---|---|
| Stack Reach Ratio | 1.656 mm | 1.593 mm | 1.514 mm |
| Bottom Bracket Height | 320 mm | 320 mm | 320 mm |
| Front Center | 617 mm | 643 mm | 668 mm |
| Rake | 44 mm | 44 mm | 44 mm |
| Trail | 93 mm | 89 mm | 89 mm |
| Stack | 593 mm | 602 mm | 607 mm |
| Reach | 358 mm | 378 mm | 401 mm |
| Top Tube Length | 570 mm | 590 mm | 615 mm |
| Seat Tube Angle | 73 ° | 73 ° | 73 ° |
| Seat Tube Length | 381 mm | 432 mm | 483 mm |
| Head Tube Angle | 69 ° | 69 ° | 69 ° |
| Head Tube Length | 115 mm | 125 mm | 130 mm |
| Chainstay Length | 435 mm | 435 mm | 435 mm |
| Wheelbase | 1050 mm | 1076 mm | 1101 mm |
| Bottom Bracket Drop | 35 mm | 35 mm | 35 mm |
| Wheels | 27" | 27" | 27" |
| Rider Min Height | 145 cm | 155 cm | 170 cm |
| Rider Max Height | 158 cm | 172 cm | 185 cm |
About this model
Impulse 27.5 is part of the Author Impulse model. Author launched 29 bikes of this model so far. You can get a glimpse at all models from 2024, by clicking on this link.
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 Crosscountry bikes
If you want to purchase a solid Crosscountry bike, it is important to know that the average cost is 1905$. However, you could also get a good Crosscountry bike even if you pay a lower amount than the average price. 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 Crosscountry bikes
The average weight for Crosscountry bikes is 12.4 kg (27.34 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.
Weighing 14.2 kg (31.31 lbs), the Impulse 27.5 model is considerably heavier than average. In conclusion, the average Crosscountry bike weighs 14.52% less than Impulse 27.5.
Impulse 27.5 components
Fork
Author Impulse 27.5 2024 bike is equipped with the RST GILA fork, and has 100mm travel. Bike forks are good shock absorbers and provide a smooth ride and a great experience. In conclusion, always look for a fork with decent travel when you buy a bike.
Wheels
The Impulse 27.5 2024 bike is equipped with 27.5″ aluminum wheels when leaving the factory. These wheels will provide you with more control over the bike. However, the 27.5″ wheels are less forgiving than the 29″ wheels.
Brakes
Stopping the bike when needed, it’s essential for your safety. This bike has Hydraulic Disc brakes. Hydraulic disc brakes provide amazing stopping power, no matter what the terrain. To sum up, these are ideal for anyone.
Sizes
There are 3 sizes available for this model. Rider height can be anywhere between 145 cm – 185 cm (4.76 ft – 6.07 ft). In conclusion, finding one for you shouldn’t be a problem.