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| Image |  |  |  |  |
|---|---|---|---|---|
| Product | Essence 2025 | Limit 26 2025 | Aura XR4 2023-24 | AUTHOR Vertigo ASL 2017 |
| Code | UA#4296150223 | UA#42954501 | UA#42951502 | UA#42877921 |
| Model card | link | link | link | link |
| Size | 17", 19" | 13.5" | 500, 520, 540, 560, 580 mm | 15", 17", 19" |
| Frame | double butted hydroformed alloy 6061 29" (L) | alloy 6061 26" | triple butted alloy 6061 | alloy 6061 700c (ASL) |
| Front fork | RST ViV Air TnL, air, lock out (80 mm) | alloy 6061 26" | AUTHOR carbon 1.5" tapered | RST Nova ML lock out (60 mm) |
| Engine | SHIMANO Steps E-5000, 250 W | - | - | - |
| Battery | SHIMANO E-8010 Li-Ion, 36 V, 14 Ah, 504 Wh | - | - | - |
| Display | SHIMANO Steps E-6100, LCD | - | - | - |
| Head parts | PRESTINE Integrated 1-1/8" | PRESTINE 1-1/8" | PRESTINE Integrated 1.5" tapered | PRESTINE Integrated 1-1/8" |
| Chain Wheel | SHIMANO Steps E-5010, 38 teeth, 170 / 175 mm cranks | PROWHEEL, 32 teeth, 152 mm cranks | FSA Gossamer Pro, 46-30 teeth, 172.5 / 175 mm cranks | SUNTOUR NCX, 44-32-22 teeth, 170 / 175mm cranks |
| BBParts | SHIMANO Steps | VP COMP, cartridge | FSA BB-6000, BB unit | SUNTOUR XCT cartridge |
| Rear derailleur | SHIMANO Cues 4000 | SHIMANO TX800 | SHIMANO Tiagra (20) | SHIMANO Altus |
| Shifters | SHIMANO Cues 4000 (9) | SHIMANO Altus (8) | SHIMANO GRX 400 (20) | SHIMANO Altus (27) |
| Free wheel | SHIMANO CS-LG300-9, 11-41 (9) | SHIMANO CS-HG31-8, 11-34 (8) | SHIMANO HG500-10, 11-34 (10) | SHIMANO HG200-9, 11-34 teeth, 9 speed |
| Chain | KMC eGlide | KMC Z8.3 | KMC X10 | KMC Z99 |
| Hubs | AUTHOR Radon, 32 holes | QUANDO, 32 holes | QUANDO Road Disc, 12 × 100 mm thru front axle, 32 holes | QUANDO Disc 32 holes |
| Brakes | TEKTRO HD-M280, disc hydraulic (7" rotors) | TEKTRO V | SHIMANO RS305, kotoučové mechanické (160 mm kotouče) | TEKTRO disc hydraulic (6" rotors) |
| Brakes levers | TEKTRO HD-M280 | TEKTRO alloy | SHIMANO Tiagra | TEKTRO |
| Rims | AUTHOR Xenon 29, 32 holes | alloy, 32 holes | JALCO SRD 21, 32 holes | AUTHOR Radon Cross 32 holes |
| Spokes | black stainless steel 2.2 mm | steel | black stainless steel 2.0 mm | black steel |
| Tires | AUTHOR Speed Master 29" × 1.75" | KENDA Small Block Eight, 26" × 1.95" | PANARACER Gravel King SK Sport 700 × 38C (40-622) | AUTHOR Speed Master 700 x 42c |
| Pedals | AUTHOR Non Slip alloy | plastic | - | AUTHOR Non Slip resin |
| Handlebar | AUTHOR, 25 mm, 680 / 700 mm | steel, 20 mm, 620 mm | PROMAX 420 / 440 / 460 mm | steel 20mm/ 640-660mm |
| Grips | AUTHOR Pro Lock | - | - | AUTHOR high density foam |
| Stem | AUTHOR alloy | alloy | AUTHOR alloy | ZOOM adjustable |
| Seat post | AUTHOR alloy (27.2) | alloy (27.2) | AUTHOR alloy (27.2) | AUTHOR alloy (27.2) |
| Seat clamp | AUTHOR (31.8) | AUTHOR (31.8) | AUTHOR (31.8) | AUTHOR (31.8) |
| Saddle | AUTHOR Area Gel | AUTHOR | AUTHOR Guru | AUTHOR Noble |
| Speed | 9 | 8 | 20 | 27 |
| Weight | 20,7 kg / 17" | 10,4 kg / 13,5" | 10,6 kg / 54 cm | 13.9 kg / 17" |
| Front derailleur | - | - | SHIMANO GRX 400 | SHIMANO Altus (31.8) |
| Grips/Bar tapes | - | - | AUTHOR suede / gel | - |
