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| Image |  |  | - | - |
|---|---|---|---|---|
| Product | Aura XR4 2025 | Empire 2025-26 | - | - |
| Code | UA#42962102 | UA#4296160226 | - | - |
| Model card | link | link | - | - |
| Size | 500, 520, 540, 560, 580 mm | 18", 20", 22" | - | - |
| Frame | triple butted alloy 6061, max tyre size 700 × 42C | double butted hydroformed alloy 6061 29" (integrated battery) | - | - |
| Front fork | AUTHOR carbon, 1.5" tapered | RST ViV Air TnL, air, lock out 1.5" tapered steerer (80 mm) | - | - |
| Head parts | FSA No. 69 / 56 / SRS / Center 1,5" | PRESTINE Integrated 1.5" tapered | - | - |
| Chain Wheel | SHIMANO GRX 600, 46-30 teeth, 172,5 / 175 mm cranks | SHIMANO Steps E-6100, 38 teeth, 170 / 175 mm cranks | - | - |
| BBParts | SHIMANO BB-RS501, BB unit | SHIMANO Steps | - | - |
| Front derailleur | SHIMANO GRX 400 | - | - | - |
| Rear derailleur | SHIMANO GRX 400 | SHIMANO Cues 6000 | - | - |
| Shifters | SHIMANO Tiagra (20) | SHIMANO Cues 6000 (10) | - | - |
| Free wheel | SHIMANO CS-HG500-10, 11-34 (10) | SHIMANO CS-LG400-10, 11-48 (10) | - | - |
| Chain | KMC X10 | KMC eGlide | - | - |
| Hubs | QUANDO Road Disc, 12 × 100 mm thru front axle, 12 × 142 mm rear axle, 32 holes | AUTHOR Xenon, 32 holes | - | - |
| Brakes | SHIMANO RS305, disc mechanical (160 mm rotors) | TEKTRO HD-M530, disc hydraulic (7" rotors) | - | - |
| Brakes levers | SHIMANO Tiagra | TEKTRO HD-M530 | - | - |
| Rims | JALCO SRD 21, 32 holes | AUTHOR Xenon 29, 32 holes | - | - |
| Spokes | black stainless steel 2.0 mm | black stainless steel 2.2 mm | - | - |
| Tires | PANARACER Gravel King SK Sport, 700 × 38C (40-622) | AUTHOR Speed Master 29" × 1.75" | - | - |
| Handlebar | PROMAX, 420 / 440 / 460 mm | AUTHOR, 15 mm, 700 / 720 mm | - | - |
| Grips/Bar tapes | AUTHOR suede / gel | - | - | - |
| Stem | AUTHOR alloy | AUTHOR alloy | - | - |
| Seat post | AUTHOR alloy (27.2) | AUTHOR alloy (27.2) | - | - |
| Seat clamp | AUTHOR (31.8) | AUTHOR (31.8) | - | - |
| Saddle | AUTHOR Guru | AUTHOR Sphere Gel | - | - |
| Speed | 20 | 10 | - | - |
| Weight | 10,8 kg / 52 cm | 21,9 kg / 20" | - | - |
| Engine | - | SHIMANO Steps E-6100, 250 W | - | - |
| Battery | - | SHIMANO E-8035 Li-Ion, 36 V, 14 Ah, 504 Wh | - | - |
| Display | - | SHIMANO Steps E-7000, LCD | - | - |
| Pedals | - | HT platform | - | - |
| Grips | - | AUTHOR Pro Lock | - | - |
