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| Image |  |  |  | - |
|---|---|---|---|---|
| Product | AUTHOR Ultima 24 2020 | AUTHOR Synergy 2017 | Aura XR4 2025 | - |
| Code | UA#42921601 | UA#42879001 | UA#42962102 | - |
| Model card | link | link | link | - |
| Size | 12.5" | 18", 20", 22" | 500, 520, 540, 560, 580 mm | - |
| Frame | alloy 6061 24" (L) | AUTHOR C carbon monocoque 700c | triple butted alloy 6061 | - |
| Front fork | hi-ten | RST Vogue Air TRL air, remote lock out 1.5" tapered steerer (60mm) | AUTHOR carbon, 1.5" tapered | - |
| Head parts | PRESTINE 1-1/8" | AUTHOR Integrated 1.5" tapered | PRESTINE Integrated, 1.5" tapered | - |
| Chain Wheel | PROWHEEL 32 teeth 152mm cranks | SHIMANO LX, 44-32-24 teeth, 170 / 170mm cranks | SHIMANO GRX 600, 46-30 teeth, 172,5 / 175 mm cranks | - |
| BBParts | VP COMP cartridge | SHIMANO MT-800 BB unit | SHIMANO BB-RS501, BB unit | - |
| Rear derailleur | SHIMANO TX800 | SHIMANO XT | SHIMANO GRX 400 | - |
| Shifters | SHIMANO Revoshift (8) | SHIMANO LX (30) | SHIMANO Tiagra (20) | - |
| Free wheel | SHIMANO HG31-8 11-34 (8) | SHIMANO HG50-10, 11-36 teeth, 10 speed | SHIMANO CS-HG500-10, 11-34 (10) | - |
| Chain | KMC 8.1 | SHIMANO HG54 | KMC X10 | - |
| Hubs | QUANDO 32 holes | AUTHOR Xenon 32 holes | QUANDO Road Disc, 12 × 100 mm thru front axle, 12 × 142 mm rear axle, 32 holes | - |
| Brakes | TEKTRO V | TEKTRO Gemini disc hydraulic (6" rotors) | SHIMANO RS305, disc mechanical (160 mm rotors) | - |
| Brakes levers | TEKTRO resin / alloy | TEKTRO Gemini | SHIMANO Tiagra | - |
| Rims | alloy 32 holes | AUTHOR Radon Cross 32 holes | JALCO SRD 21, 32 holes | - |
| Spokes | hi-ten | black stainless steel 2.0 mm | black stainless steel 2.0 mm | - |
| Tires | 24" × 1.50" | AUTHOR PANARACER Silk Road Cross kevlar 700 x 42c | PANARACER Gravel King SK Sport, 700 × 38C (40-622) | - |
| Pedals | resin | AUTHOR oneside clipless | - | - |
| Handlebar | hi-ten 20 mm 580 mm | AUTHOR 15mm/ 620-640-660mm | PROMAX, 420 / 440 / 460 mm | - |
| Grips | AUTHOR kratton rubber | AUTHOR Luxus ErgoGrip | - | - |
| Stem | alloy | AUTHOR alloy | AUTHOR alloy | - |
| Seat post | alloy (27.2) | AUTHOR alloy (27.2) | AUTHOR alloy (27.2) | - |
| Seat clamp | AUTHOR (31.8) | AUTHOR (31.8) | AUTHOR (31.8) | - |
| Saddle | AUTHOR | AUTHOR Navigator | AUTHOR Guru | - |
| Speed | 8 | 30 | 20 | - |
| Weight | 10,9 kg /12,5" | 11.4 kg / 20" | - | - |
| Front derailleur | - | SHIMANO LX (34.9) | SHIMANO GRX 400 | - |
| Tapes | - | - | AUTHOR suede / gel | - |
