| Selected Bikes |  Author Ultrasonic 27.5 2021-22
Brand: Model: |
 Jamis Explorer A2 Step-Thru
Brand: Model: |
Brand: Model: |
Brand: Model: |
| Speed | 11 | -- | ||
| Frame | Triple butted hydroformed alloy 6061 27.5" | 6061 TIG-welded aluminum, all-new sport comfort design with upright ride position, replaceable derailleur hanger, center-mount kickstand bracket | ||
| Stem | AUTHOR alloy | Jamis alloy, angle-adjustable, 90mm ext x 150mm quill (14–18") or 110mm ext x 180mm quill (19–21”) | ||
| Handle Bar | AUTHOR Flat Top bar 9° 620 / 640 mm | Comfort hi-rise, steel, 25.4 x 80mm rise x 15˚ sweep x 620mm | ||
| Fork | Front : RST F1RST 27.5 air, lock out (80 mm) | Hi-tensile steel unicrown, radius blades with dropout eyelets | ||
| Seatpost | AUTHOR alloy (31.6) | Alloy micro-adjust, 350mm x 27.2mm, with alloy QR clamp | ||
| Grip | AUTHOR kratton rubber | Kraton comfort | ||
| Crankset | -- | Forged alloy, 48/38/28T, 170mm with chainguard | ||
| Pedals | Alloy | Comfort platform with TPE non-slip insert | ||
| Chain | KMC X11 | KMC Z7 | ||
| Shifters | SHIMANO SLX (11) | Shimano EZ-Fire Plus, ST-EF500, 21-speed | ||
| Saddle | AUTHOR Champion Author Navigator | Jamis Comfort with extra thick padding, synthetic suede top, burnished side panels and bumper springs | ||
| Headset | -- | Internal cup, threaded, 1 1/8” | ||
| Derailleur Front | -- | Shimano TY510 top swing/dual pull | ||
| Derailleur Rear | SHIMANO SLX | Shimano TY300 | ||
| Hub Front | AUTHOR Xenon 32 holes | -- | ||
| Spoke | Black stainless steel 2.0 mm | -- | ||
| Cassette | -- | Shimano freewheel 7-speed, 14-34 | ||
| Bottom Bracket | PROWHEL BB unit | Sealed cartridge, 68 x 110.5mm |
| Front | CST B-Trail aramid 27.5" × 2.25" | CST - 1918, 27.5 x 2.1 | ||
| Rear | CST B-Trail aramid 27.5" × 2.25" | CST - 1918, 27.5 x 2.1 | ||
| Wheel / RIM | Rims :AUTHOR Xenon TRC 27.5 32 holes | Alloy 36H rims, Formula alloy hubs, QR front and rear, 14g stainless steel spokes |
| Front | TEKTRO Gemini disc hydraulic (6" rotors) | ProMax alloy direct pull brakes with Shimano levers | ||
| Rear | TEKTRO Gemini disc hydraulic (6" rotors) | ProMax alloy direct pull brakes with Shimano levers | ||
| Brake Lever | TEKTRO Gemini WS | -- |
| Front | -- | -- | ||
| Rear | -- | -- |
| Colors | -- | -- |
| Length | -- | -- | ||
| Weight | 12 kg | 13.8 kg |
| Features | -- | -- | ||
| Additional Details | SIZE :14", 16" HEAD PARTS: AUTHOR Integrated 1.5" tapered CHAIN WHEEL : PROWHEEL 32 teeth 165 / 170 mm cranks |
Sizes : 14”, 16”, 18" |
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