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2015 Author

Impulse

A 27.5″ aluminum frame hardtail crosscountry bike with modest components.
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Weight14.5 kg  
FrameAluminum
SuspensionHardtail, 100mm
ForkRST GILA
Wheels27.5″ Aluminum
Drivetrain3 × 7
GroupsetAltus
BrakesTektro Hydraulic Disc
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Insights
Ride Feel

Based on frame geometry and build specs.

Terrain
easyextreme
Handling
nimblestable
Impulse
Other Crosscountry bikes
Gearing

A bike with lower gearing will be easier to ride up steep hills, while a higher top end means it will pedal faster down hills.

Lowest gear

(climbing)

46 km/h

Impulse

44 km/h

Similar Bikes

Highest gear

(descending)

Sizing
15"

140cm – 156cm

17"

154cm – 171cm

19"

169cm – 186cm

21"

184cm – 195cm

Rider Fit Notes

None yet.

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Geometry
Specs
Build
Frame

alloy 6061 27.5"

Fork

RST Gila 27.5 ML lock out (100 mm)

Travel100mm

Spring TypeCoil

Stem

AUTHOR alloy

Handlebar

AUTHOR 20 mm 660 / 680 mm

Saddle

AUTHOR Courier

Seatpost

AUTHOR alloy (31.6)

TypeRigid

Pedals

resin

Grips

AUTHOR high density foam

Groupset
Rear Derailleur

SHIMANO Altus

Front Derailleur

SHIMANO M190 (34.9)

Crank

PROWHEEL 42-34-24 teeth 170 / 175 mm cranks

Shifters

SHIMANO Altus (21)

Cassette

SHIMANO HG20-7 12-32 (7)

Chain

KMC Z51

Brakes

TEKTRO Auriga disc hydraulic (6" rotors)

TypeTektro Hydraulic Disc

Wheels
Rims

AUTHOR Radon 27.5 32 holes

Spokes

steel

Front Hub

QUANDO Disc 32 holes

Rear Hub

QUANDO Disc 32 holes

Tires

AUTHOR Rocket 27.5" x 2.10"

Rider Notes
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First added November 2

Last updated November 8

Not listed for 1,298 days