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| Image |  |  | - | - |
|---|---|---|---|---|
| Product | AUTHOR Bicycle Stratos ASL 2011 | Aura XR4 2025 | - | - |
| Code | UA#42786401 | UA#42962102 | - | - |
| Model card | link | link | - | - |
| Size | 17", 19.5" | 500, 520, 540, 560, 580 mm | - | - |
| Frame | alloy 6061 700c (ASL) | triple butted alloy 6061, max tyre size 700 × 42C | - | - |
| Front fork | RST Neon ML mechanical lock out (60 mm) | AUTHOR carbon, 1.5" tapered | - | - |
| Head parts | AUTHOR Integrated 1-1/8" | FSA No. 69 / 56 / SRS / Center 1,5" | - | - |
| Chain Wheel | SUNTOUR XCT-V2-308 48-38-28 170 / 175 mm cranks | SHIMANO GRX 600, 46-30 teeth, 172,5 / 175 mm cranks | - | - |
| BBParts | SUNTOUR XCM cartridge | SHIMANO BB-RS501, BB unit | - | - |
| Front derailleur | SHIMANO M-191 (34.9) | SHIMANO GRX 400 | - | - |
| Rear derailleur | SHIMANO Alivio | SHIMANO GRX 400 | - | - |
| Shifters | SHIMANO Acera (24) | SHIMANO Tiagra (20) | - | - |
| Free wheel | SHIMANO HG-40-8I 11-32 (8) | SHIMANO CS-HG500-10, 11-34 (10) | - | - |
| Chain | SHIMANO HG-50 | KMC X10 | - | - |
| Hubs | QUANDO 32 holes | QUANDO Road Disc, 12 × 100 mm thru front axle, 12 × 142 mm rear axle, 32 holes | - | - |
| Brakes | TEKTRO 57AL | SHIMANO RS305, disc mechanical (160 mm rotors) | - | - |
| Brakes levers | SHIMANO Acera | SHIMANO Tiagra | - | - |
| Rims | JALCO ATB 220 black doublewall 32 holes | JALCO SRD 21, 32 holes | - | - |
| Spokes | black stainless steel 2.0 mm | black stainless steel 2.0 mm | - | - |
| Tires | AUTHOR PANARACER Silk Road Cross 700 x 35c | PANARACER Gravel King SK Sport, 700 × 38C (40-622) | - | - |
| Pedals | AUTHOR alloy | - | - | - |
| Handlebar | AUTHOR 20 mm | PROMAX, 420 / 440 / 460 mm | - | - |
| Grips | AUTHOR ErgoGrip | - | - | - |
| Stem | UNO adjustable | AUTHOR alloy | - | - |
| Seat post | AUTHOR alloy (31.6) | AUTHOR alloy (27.2) | - | - |
| Seat clamp | AUTHOR (34.9) | AUTHOR (31.8) | - | - |
| Saddle | AUTHOR Ergo Gel Lady | AUTHOR Guru | - | - |
| Speed | 24 | 20 | - | - |
| Weight | 12.9 kg / 17" | 10,8 kg / 52 cm | - | - |
| Grips/Bar tapes | - | AUTHOR suede / gel | - | - |
