| Selected Bikes |  Author Ultrasonic 27.5 2021-22
Brand: Model: |
 Trek 520 Grando
Brand: Model: |
Brand: Model: |
Brand: Model: |
| Load Carrying Capacity | -- | Combined weight of bicycle, rider, and cargo of 275 pounds (125 kg) | ||
| Speed | 11 | -- | ||
| Frame | Triple butted hydroformed alloy 6061 27.5" | Trek butted chromoly disc touring, rack & fender mounts, 135 x 5 mm QR | ||
| Stem | AUTHOR alloy | Size : 48 - Bontrager Elite, 31.8 mm, Blendr compatible, 7 degree, 80 mm length Size : 51 - Bontrager Elite, 31.8 mm, Blendr compatible, 7 degree, 90 mm length Size : 54, 57 - Bontrager Elite, 31.8 mm clamp, Blendr compatible, 7 degree, 100 mm length Size : 60, 63 - Bontrager Elite, 31.8 mm clamp, Blendr compatible, 7 degree, 110 mm length |
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| Handle Bar | AUTHOR Flat Top bar 9° 620 / 640 mm | Size : 48 - Bontrager Comp VR-C, alloy, 31.8 mm, 100 mm reach, 124 mm drop, 40cm width Size : 51, 54 - Bontrager Comp VR-C, alloy, 31.8 mm, 100 mm reach, 124 mm drop, 42cm width Size : 57, 60, 63 - Bontrager Comp VR-C, alloy, 31.8 mm, 100 mm reach, 124 mm drop, 44cm width |
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| Fork | Front : RST F1RST 27.5 air, lock out (80 mm) | 520 alloy disc touring, rack mounts, 100 x 5 mm ThruSkew | ||
| Seatpost | AUTHOR alloy (31.6) | Size : 48 - Bontrager alloy, 27.2 mm, 12 mm offset, 250 mm length Size : 51, 54, 57, 60, 63 - Bontrager alloy, 27.2 mm, 12 mm offset, 330 mm length |
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| Grip | AUTHOR kratton rubber | -- | ||
| Crankset | -- | Size : 48, 51 - ProWheel forged alloy, 42/28, 2-piece, 170 mm length Size : 54, 57, 60, 63 - ProWheel forged alloy, 42/28, 2-piece, 175 mm length |
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| Pedals | Alloy | Wellgo nylon body, alloy cage | ||
| Chain | KMC X11 | KMC X10, 10 speed | ||
| Shifters | SHIMANO SLX (11) | Shimano Tiagra R4700, 10 speed | ||
| Saddle | AUTHOR Champion Author Navigator | Bontrager Arvada, steel rails, 138 mm width | ||
| Headset | -- | 1-1/8'' threadless, sealed cartridge bearings | ||
| Derailleur Front | -- | Shimano Tiagra 4700, 34.9 mm clamp, down swing | ||
| Derailleur Rear | SHIMANO SLX | Shimano GRX RX400, long cage, 36T max cog | ||
| Hub Front | AUTHOR Xenon 32 holes | Shimano M475, 6-bolt disc, 135 x 5 mm QR | ||
| Hub Rear | -- | Shimano M475, 6-bolt disc, 100 x 5 mm QR | ||
| Spoke | Black stainless steel 2.0 mm | 14g stainless steel | ||
| Cassette | -- | Shimano HG50, 11-36, 10 speed | ||
| Bottom Bracket | PROWHEL BB unit | -- |
| Front | CST B-Trail aramid 27.5" × 2.25" | Bontrager GR1 Expert, Hard-Case Lite, wire bead, 60 tpi, 700 x 40c | ||
| Rear | CST B-Trail aramid 27.5" × 2.25" | Bontrager GR1 Expert, Hard-Case Lite, wire bead, 60 tpi, 700 x 40c | ||
| Wheel / RIM | Rims :AUTHOR Xenon TRC 27.5 32 holes | Bontrager Affinity Disc, Tubeless Ready, 36-hole, 21 mm width, presta valve |
| Front | TEKTRO Gemini disc hydraulic (6" rotors) | TRP Spyre C 2.0 mechanical disc, 160 mm rotor | ||
| Rear | TEKTRO Gemini disc hydraulic (6" rotors) | TRP Spyre C 2.0 mechanical disc, 160 mm rotor | ||
| Brake Lever | TEKTRO Gemini WS | -- |
| Front | -- | -- | ||
| Rear | -- | -- |
| Colors | -- | Nautical Navy |
| Length | -- | -- | ||
| Weight | 12 kg | 13.28 kg |
| Features | -- | -- | ||
| Additional Details | SIZE :14", 16" HEAD PARTS: AUTHOR Integrated 1.5" tapered CHAIN WHEEL : PROWHEEL 32 teeth 165 / 170 mm cranks |
Cargo rack : Bontrager Carry Forward |
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