AUTHOR Sonic 27,5 2021 - triple butted alloy frame

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.

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Technical specification

Size	14", 16"
Frame	triple butted hydroformed alloy 6061 27.5"
Front fork	RST Aerial 27.5 TnL air, lock out (80 mm)
Head parts	AUTHOR Integrated 1.5" tapered
Chain Wheel	PROWHEEL 32 teeth 165 / 170 mm cranks
BBParts	PROWHEL BB unit
Rear derailleur	SHIMANO Deore
Shifters	SHIMANO Deore (10)
Free wheel	SHIMANO M4100-10 11-46 (10)
Chain	KMC X10
Hubs	QUANDO Disc 32 holes
Brakes	TEKTRO Auriga disc hydraulic (6" rotors)
Brakes levers	TEKTRO Auriga WS

Rims	AUTHOR Xenon TRC 27.5 32 holes
Spokes	black stainless steel 2.0 mm
Tires	CST B-Trail aramid 27.5" × 2.25"
Pedals	alloy
Handlebar	AUTHOR Flat Top bar 9° 620 / 640 mm
Grips	AUTHOR kratton rubber
Stem	AUTHOR alloy
Seat post	AUTHOR alloy (31.6)
Seat clamp	AUTHOR (34.9)
Saddle	AUTHOR Champion
Speed	10
Weight	12,2 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

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