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2026 Author

Sonic 27.5

A 27.5″ aluminum frame hardtail crosscountry bike with mid-range components.

Weight28.2 lbs  
FrameAluminum
SuspensionHardtail, 80mm
ForkRST AERIAL
Wheels27.5″ Aluminum
GroupsetCUES
BrakesTektro Hydraulic Disc
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Insights
Ride Feel

Based on frame geometry and build specs.

Terrain
easyextreme
Handling
nimblestable
Sonic 27.5
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)

24 mph

Sonic 27.5

27 mph

Similar Bikes

Highest gear

(descending)

Sizing
14"

4'7" – 5'3"

16"

5'1" – 5'9"

Rider Fit Notes

None yet.

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Geometry
Specs
Build
Frame

triple butted hydroformed alloy 6061 27.5"

Color: Grey / Black / Orange

Fork

RST Aerial 27.5 TnL, air, lock out (80 mm)

Travel: 80mm

Spring Type: Air

Stem

AUTHOR alloy

Handlebar

AUTHOR Flat Top bar, 9°, 620 / 640 mm

Saddle

AUTHOR Champion / 14", AUTHOR Navigator / 16"

Seatpost

AUTHOR alloy (31.6)

Type: Rigid

Pedals

plastic

Groupset
Rear Derailleur

SHIMANO Cues 6000

Crank

PROWHEEL, 32 teeth, 160 / 165 mm cranks

Shifters

SHIMANO Cues 6000 (10)

Cassette

SHIMANO CS-LG400-10, 11-48 (10)

Chain

KMC XGlide

Brakes

TEKTRO HD-M276, disc hydraulic (6" rotors)

Type: Tektro Hydraulic Disc

Wheels
Rims

AUTHOR Xenon TRC 27.5, 32 holes

Spokes

black stainless steel 2.0 mm

Front Hub

QUANDO Disc, 32 holes

Rear Hub

QUANDO Disc, 32 holes

Tires

CST B-Trail, aramid, 27.5" × 2.25"

Rider Notes
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First added December 6

Last updated May 30