Author Ronin 2025 (red)
Chromoly frame and chromoly fork
□ SHIMANO GRX 600 / 400 components, 20 speeds
□ SHIMANO GRX 400 hydraulic disc brakes
□ Mounts for the CARGO ACR-F05-ALU rack
□ Legendary PANARACER Gravel King SK Sport 700 × 40c tyres
□ Special AUTHOR Guru gravel saddle
□ AUTHOR suede / gel bar tape
The more affordable version of the sport-touring-expedition Author Ronin is built on a 3× butted chromoly frame with a fork of the same material. Amid todays flood of fat carbon and aluminium tubes, its slim frame lines look as if from another world. For many people it offers an escape from the mainstream and an expression of a different lifestyle. This trend also has rational advantages and benefits for the rider in the form of greater comfort and the easier repairability of steel. That comes in handy especially on long expeditions far from civilisation, where this machine is at home. Fitted with all possible racks and bags, it can be the perfect companion even on a trip around the world. Of course that isnt its only forte – it works just as well as an everyday bike, for roaming forest and field tracks, commuting to work or as an all-weather "winter bike". The Shimano GRX groupset with hydraulic disc brakes guarantees trouble-free operation in all conditions. Thats the Author Ronin, an iron samurai looking for a new master to offer his services and extraordinary experiences.
Frame geometry
| Size | min height | max height | S/T c-t | S/T c-c | T/T h | T/T a | H/Tt | C/S | W/B | S/T ang. | H/T ang. | F/L | B/B | reach | stack | F/R | hb | stem | crank |
| 500 | 160 | 170 | 500 | 460 | 530 | 515 | 120 | 425 | 1015 | 74.5 | 70.5 | 408 | 70 | 374 | 562 | 45 | |||
| 520 | 168 | 178 | 520 | 480 | 545 | 529 | 140 | 425 | 1021 | 74 | 71 | 408 | 70 | 378 | 583 | 45 | |||
| 540 | 176 | 188 | 540 | 500 | 560 | 542 | 160 | 425 | 1032 | 73.5 | 71 | 408 | 69 | 382 | 601 | 45 | |||
| 560 | 186 | 195 | 560 | 520 | 580 | 560 | 180 | 425 | 1042 | 73 | 71.5 | 408 | 68 | 390 | 617 | 45 | |||
| 580 | 193 | 205 | 580 | 540 | 595 | 573 | 200 | 425 | 1046 | 72.5 | 72 | 408 | 68 | 393 | 642 | 45 |
- 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
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| frame: | triple butted chromoly |
| front wheel / hub: | QUANDO Road Disc 32 děr |
| rear wheel / hub: | QUANDO Road Disc 32 děr |
| tires: | PANARACER Gravel King SK Sport 700 × 38C (40-622) |
| front derailleur: | SHIMANO GRX 400 |
| rear derailleur: | SHIMANO GRX 400 |
| saddle: | AUTHOR Guru |
| chain: | KMC X10 |
| fork: | chromoly 700C |
| brake levers: | SHIMANO GRX 400 |
| brakes: | SHIMANO GRX 400, kotoučové hydraulické (160 mm kotouče) |
| shifters: | SHIMANO GRX 400 (20) |
| cranks: | SHIMANO GRX 600 46-30 zubů 172, 5 / 175 mm kliky / SHIMANO BB-RS500, BB unit |
| cassette: | SHIMANO CS-HG500-10 11-34 (10) |
| seatpost: | AUTHOR dural (27.2) |
| model year: | 2025 |


















































































































































































































































































































































































































































































