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 Z8.1
Pedals
resin
Wheels
Front Hub
QUANDO Disc 32 holes
Rear Hub
QUANDO Disc 32 holes
Rims
AUTHOR Xenon 27.5 32 holes
Spokes
hi-ten black
Tires
AUTHOR Rocket 27.5" x 2.10"
Brakes
Brakes
TEKTRO disc hydraulic (6" rotors)
Cockpit
Stem
AUTHOR alloy
Handlebar
AUTHOR 8° 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 | 68 mm | 68 mm | 68 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 |
About this model
Impulse 27.5 belongs to the Author Impulse model. There are 25 bikes that carry this model name. You can get a glimpse at all models from 2020, by clicking on this link.
Safety
Take safety seriously when you ride your bike, and always wear your helmet. Moreover, don’t ride on the sidewalk. This is actually against the law in some states and can be dangerous for both you and pedestrians.
Crosscountry bikes average price
According to our math, the average price for a trustworthy Crosscountry bike is 1905$. However, even if your budget is less than the average, you might still be able to get a top-quality Crosscountry bike. In conclusion, always check bike reviews and their components before making a purchase to make sure you don’t overpay.
Crosscountry bikes average weight
Crosscountry bikes have an average weight of 12.4 kg (27.34 lbs). It is a good advantage to have a lighter bike than the average. However, a heavier bike is more efficient on descents.
Impulse 27.5 weighs 14.2 kg (31.31 lbs) and is considerably heavier than the average. In conclusion, the average Crosscountry bike weighs 14.52% less than Impulse 27.5.
Overview of components
Fork
Author Impulse 27.5 2020 bike is equipped with the RST GILA fork, and has 100mm travel. Bike forks are great for shock absorption and provide you with a smooth ride. To sum up, when buying a bicycle, make sure you get a fork that is capable of delivering decent travel.
Wheels size
As for the wheels, Author Impulse 27.5 2020, has a 27.5″ aluminum model. The 27.5″ wheels are a great choice for smaller riders. However, these wheels have a slower top speed if you compare them to 29″ wheels.
Brakes
For your safety, it is important to have quality breaks on your bike. Author Impulse 27.5 has Hydraulic Disc brakes installed. Hydraulic disc brakes provide amazing stopping power, no matter what the terrain. To sum up, you can ride your bike with confidence.
Sizes
This bike is available in 3 sizes. They vary from 145 cm – 185 cm (4.76 ft – 6.07 ft). In conclusion, finding one for you shouldn’t be a problem.