AUTHOR Ultrasonic 24 2023 - tripple butted alloy frame

Are you looking for the best in its category? Author Ultrasonic 24 on a very light triple butted frame with so-called hydroforming technology, which guarantees perfect strength, durability and significant weight savings. Performance-oriented racing geometry, lightweight alloy fork, KENDA Kevlar tires and SHIMANO Alivio components

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Technical specification

Size	12"
Frame	triple butted hydroformed alloy 6061 24"
Front fork	alloy 6061 24"
Head parts	PRESTINE Integrated 1.5" tapered
Chain Wheel	LASCO, 32 teeth, 150 mm cranks
BBParts	VP COMP, cartridge
Rear derailleur	SHIMANO Alivio
Shifters	SHIMANO Alivio (9)
Free wheel	SHIMANO HG400-9, 11-36 (9)
Chain	KMC Z9
Hubs	QUANDO, 24 holes
Brakes	TEKTRO V
Brakes levers	TEKTRO alloy

Rims	alloy, 24 holes
Spokes	black stainless steel 2.0 mm
Tires	KENDA Small Block Eight aramid 24" × 1.95"
Pedals	resin
Handlebar	AUTHOR Flat Top bar, rise 0 mm, 600 mm
Grips	AUTHOR kratton rubber
Stem	AUTHOR alloy
Seat post	AUTHOR alloy (31.6)
Seat clamp	AUTHOR (34.9)
Saddle	AUTHOR Champion
Speed	9
Weight	9,8 kg / 12"

Geometry and sizes

Size	12"
Min. figure ~~[cm]~~	125
Max. figure ~~[cm]~~	140
S/T c-t ~~[mm]~~	305
S/T c-c ~~[mm]~~	0
T/T h ~~[mm]~~	500
T/T a ~~[mm]~~	482
H/T ~~[mm]~~	110
C/S ~~[mm]~~	400
W/B ~~[mm]~~	965
S/T ang. ~~[°]~~	73
H/T ang. ~~[°]~~	70
F/L ~~[mm]~~	372
B/B drop ~~[mm]~~	25
B/B width ~~[mm]~~	68
Reach ~~[mm]~~	0
Stack ~~[mm]~~	0
F/R ~~[mm]~~	45
Handlebars ~~[mm]~~	0
Stem ~~[mm]~~	0
Cranks ~~[mm]~~	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