Author Sonic 27.5 2025 (grey/black/orange)

Author Sonic 27.5 2025 (grey/black/orange)

Wheel diameter 27.5"

□ Suitable for heights of 140–170 cm, frame sizes 14"/16"

□ Weight 12.2 kg

□ New hydroformed aluminium frame, 32-tooth single chainring, shorter 160/165 mm cranks

□ RST air fork, TEKTRO hydraulic disc brakes

□ CST B-Trail Kevlar tyres 27.5" × 2.25"

□ SHIMANO CUES components, 10-speed

A versatile sports model for a junior or a petite woman? Low weight and quality components at a reasonable price? A bike that holds its own even on a race course? Thats all the Author Sonic 27.5, designed for young riders or women 140–170 cm tall. It has a lightweight hydroformed duralumin frame in 2 sizes (with internal routing of hoses and cables). A light RST air fork that can be adjusted to any rider weight is a matter of course. There are also hydraulic disc brakes and a single-chainring Shimano Cues drivetrain with 10 speeds at the rear. Besides the low weight, the larger 27.5" wheels fitted with folding Kevlar CST tyres with a fine tread also contribute to the ease of riding. Whether youre after a race machine or just a light, fast bike, this strong, versatile machine will meet your requirements.

Frame geometry

Explanations

• S/T c-t - seat tube (center-top), seat tube length from the centre of the bottom bracket to its top
• S/T c-c - seat tube (center-center), seat tube length from the centre of the bottom bracket to the top tube axis
• T/T h - top tube horizontal, horizontal top tube length
• T/T a - top tube actual, actual top tube length
• H/T - head tube, head tube length
• C/S - chain stay, chainstay length
• W/B - wheel base, wheelbase (distance between the front and rear wheel axles)
• S/T ang. - seat tube angle, angle between the seat tube axis and an imaginary line connecting the front and rear wheel axles
• H/T ang. - head tube angle, angle between the head tube axis and an imaginary line connecting the front and rear wheel axles
• F/L - fork length, fork length from the bottom of the headset to the centre of the front wheel
• B/B drop - bottom bracket drop, distance between an imaginary line connecting the wheel centres and the centre of the bottom bracket
• F/R - fork rake, distance between the head tube axis and the fork axle measured at the centre of the front wheel, the so-called offset
• hb - handlebars
• stem - stem
• crank - cranks

Additional information