AUTHOR Sonic 27,5 2021-22 - triple butted alloy frame

AUTHOR Sonic 27,5 2021-22Triple butted alloy frame  |  RST air fork  |  Hydraulic TEKTRO brakes

One of the top models in its category. Ultralight alloy frame with triple butted tubes, RST 80mm travel air fork, SHIMANO Deore components, 10 speeds, TEKTRO hydraulic brakes and CST tires. Whether you are looking for a racing special or a light top equipped bike, Author Sonic is a powerful machine that will support the performance of your rider and support him even in more demanding conditions. 
AUTHOR Sonic 27,5 2021-22
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Technical specification

Size14", 16"
Frametriple butted hydroformed alloy 6061 27.5"
Front forkRST Aerial 27.5 TnL air, lock out (80 mm)
Head partsAUTHOR Integrated 1.5" tapered
Chain WheelPROWHEEL 32 teeth 165 / 170 mm cranks
Rear derailleurSHIMANO Deore
ShiftersSHIMANO Deore (10)
Free wheelSHIMANO M4100-10 11-46 (10)
ChainKMC X10
HubsQUANDO Disc 32 holes
BrakesTEKTRO Auriga disc hydraulic (6" rotors)
Brakes leversTEKTRO Auriga WS
RimsAUTHOR Xenon TRC 27.5 32 holes
Spokesblack stainless steel 2.0 mm
TiresCST B-Trail aramid 27.5" × 2.25"
HandlebarAUTHOR Flat Top bar 9° 620 / 640 mm
GripsAUTHOR kratton rubber
StemAUTHOR alloy
Seat postAUTHOR alloy (31.6)
Seat clampAUTHOR (34.9)
SaddleAUTHOR Champion
Weight12,2 kg / 16"

Geometry and sizes

Size 14" 16"
Min. figure [cm] 140 155
Max. figure [cm] 158 173
S/T c-t [mm] 356 406
S/T c-c [mm] 0 0
T/T h [mm] 550 575
T/T a [mm] 544 557
H/T [mm] 110 115
C/S [mm] 420 420
W/B [mm] 1052 1067
S/T ang. [°] 74 73.5
H/T ang. [°] 69 69.5
F/L [mm] 475 475
B/B drop [mm] 45 45
B/B width [mm] 73 73
Reach [mm] 0 0
Stack [mm] 0 0
F/R [mm] 43 43
Handlebars [mm] 0 0
Stem [mm] 0 0
Cranks [mm] 0 0
max min
AUTHOR Sonic 27,5 2021-22

The recommended size and stature are just indicative. It is recommended to always consult your choice with the dealer.

  • S/T c-t - seat tube (center-top), length of the seat tube from the middle of BB parts to its peak
  • S/T c-c - seat tube (center-center), length of the seat tube from the middle of BB parts to an axle of the upper tube
  • T/T h - top tube horizontal, horizontal lenght of the upper tube
  • T/T a - top tube actual, real lenght of the upper tube
  • H/T - head tube, head tube lenght
  • C/S - chain stay, chain brace lenght
  • W/B - wheel base, wheelbase (front and rear axle lenght)
  • S/T ang. - seat tube angel, angle between the seat tube axis and an imaginary line connecting the axes of the front and rear wheel
  • H/T ang. - head tube angel, angle between the head tube axis and an imaginary line connecting axes of the front and rear wheels
  • F/L - fork length, fork length from the head parts bottom to the middle of the front wheel
  • B/B drop - bottom bracked drop, lenght between an imaginary line connecting wheels centers and BB parts, measured from BB parts
  • F/R - fork rake, distances between the head tube axis and fork axis measured at center of the front wheel, so-called. off set


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Product options

red14" = UA#42933100   16" = UA#42933101