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| Image |  |  |  | - |
|---|---|---|---|---|
| Product | AUTHOR ULTIMA 2008 | Impulse 29 2023-24 | AUTHOR ERA + 2008 | - |
| Code | UA#42741101 | UA#4294490225 | UA#42744401 | - |
| Model card | link | link | link | - |
| Size | 15" | 17", 19", 21" | M, L, XL | - |
| Frame | hi-ten 24" (L) | alloy 6061 29" | alloy MU9/6061, suspension | - |
| Front fork | hi-ten | RST Blaze 29 ML, lock out (100 mm) | ROCK SHOX Recon 355 Solo Air air, lock out (130 mm) | - |
| Head parts | VP Comp. 1" | PRESTINE Integrated 1-1/8" | RITCHEY Zero Logic Integ Pro 1-1/8" | - |
| Chain Wheel | PROWHEEL 42-34-24 152mm cranks | PROWHEEL, 42-34-24 teeth, 170 / 175 mm cranks | FSA Aftreburner Mega Exo 44-32-22 170 / 175 mm cranks | - |
| BBParts | VP Comp. | VP COMP, cartridge | FSA MegaExo BB unit | - |
| Front derailleur | SHIMANO TZ-30 (28.6) | SHIMANO TY700 (34.9) | SRAM X9 (34.9) | - |
| Rear derailleur | SHIMANO TY-18 | SHIMANO Altus | SRAM X9 | - |
| Shifters | SHIMANO Revoshift (18) | SHIMANO Altus (24) | SRAM X9 Trigger (27) | - |
| Free wheel | SHIMANO MF-TZ-06 14-28 | SHIMANO HG200-8, 12-32 (8) | SRAM PG-970 11-34 | - |
| Chain | SHIMANO HP-20 | KMC Z8.3 | SRAM PC-971 | - |
| Hubs | steel 36 holes | QUANDO Disc, 32 holes | AUTHOR Helium Pro cartridge 32 holes | - |
| Brakes | V alloy | TEKTRO HD-M275 disc hydraulic (6" rotors) | HAYES Stroker Trail disc hydraulic (7" rotors) | - |
| Brakes levers | TEKTRO plastic /alloy | TEKTRO HD-M275 | HAYES | - |
| Rims | alloy 36 holes | AUTHOR Xenon 29, 32 holes | AUTHOR Helium Pro 32 holes | - |
| Spokes | steel | black steel | black stainless steel 2.2mm butted | - |
| Tires | 24" x 1 3/8" | VITTORIA Barzo 29" × 2.10" | MAXXIS Ignitor Kevlar 26" x 2.10" | - |
| Pedals | resin | plastic | SHIMANO M540 clipless | - |
| Handlebar | KALIN steel | AUTHOR Flatbar, 9°, 700 mm | EASTON M-Lite XC 31.8 mm | - |
| Grips | AUTHOR high density foam | AUTHOR kratton rubber | AUTHOR superlite foam | - |
| Stem | KALIN steel | AUTHOR alloy | EASTON EA70 31.8 mm | - |
| Seat post | KALIN steel (25.4) | AUTHOR alloy (31.6) | AUTHOR carbon (31.6) | - |
| Saddle | AUTHOR race-color | AUTHOR Courier | FIZIK Gobi XM | - |
| Speed | 18 | 24 | 27 | - |
| Weight | 12.40kg/ 15" | 14,9 kg / 19" | 12.80kg/ L | - |
| Seat clamp | - | AUTHOR (34.9) | AUTHOR (34.9) | - |
| Shocker | - | - | oil-air shocker FOX Float Float RP2 190 / 50 mm (rear travel 130 mm) | - |
