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 | 1.66 mm | 1.6 mm | 1.52 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 | 591 mm | 600 mm | 605 mm |
| Reach | 356 mm | 376 mm | 399 mm |
| Top Tube Length | 568 mm | 588 mm | 613 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 | 433 mm | 433 mm | 433 mm |
| Wheelbase | 1048 mm | 1074 mm | 1099 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 |
Model Overview
Impulse 27.5 is an Author Impulse model. Author launched 25 bikes of this model so far. You can easily view all of the Author Impulse bikes models from 2023, here.
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 Crosscountry bikes
If you want an acceptable Crosscountry bike you should know that the average price is 1905$. However, this doesn’t mean that if you spend less money on a Crosscountry bike, you couldn’t get a decent one. To make sure you don’t pay a higher amount than normal for your bike, always do some components analysis and read reviews.
Crosscountry bikes average weight
If we make a quick analysis of the average weight of a Crosscountry bike, we get 12.31 kg (27.14 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.
Author Impulse 27.5 it’s weighing 14.2 kg (31.31 lbs). At this weight, is much heavier than average. In conclusion, the average Crosscountry bike weighs 15.35% less than Impulse 27.5.
Overview of components
Fork
The Impulse 27.5 comes factory-installed with the RST GILA fork. This has a travel range of 100mm. Bike forks are perfect to absorb shocks and provide a great riding experience overall. In short, make sure you choose one with a decent fork when you purchase your dream bike.
Wheels
The wheels on Impulse 27.5 are the 27.5″ aluminum type. 27.5″ wheels are a mixture between 29″ wheels and 26″ wheels. However, these wheels have a slower top speed if you compare them to 29″ wheels.
Brakes
Nothing is more important on a bike than its ability to brake properly. Author Impulse 27.5 is equipped with Hydraulic Disc brakes. These kinds of brakes are among the most popular models used on bikes. To sum up, these are ideal for anyone.
Sizes
Impulse 27.5 comes in 3 sizes, that range from 145 cm – 185 cm (4.76 ft – 6.07 ft). In short, you can easily find one that suits you.