An ergonomic, low-drag bicycle with a reclined seat and integrated lockable storage box for daily commuting and campus/industrial use. The recumbent posture spreads body weight over the back/hips (reduced wrist/neck strain), lowers the center of gravity for stability, and improves aerodynamics for higher cruising speeds on flats. A long chain is routed via idler(s) to a rear derailleur drivetrain; steering can be USS (under-seat) or OSS (over-seat). The rear tail section carries a 20–35 L storage box for tools, laptop, or groceries..

Parts Used:

1. Frame & Fork: Mild-steel (MS) or aluminum tubing (SWB or LWB geometry), head tube, dropouts
2. Seat Module: Molded FRP/ABS seat or mesh seat with adjustable seat-back angle (≈25–35°)
3. Steering:
4. USS: under-seat handlebar + linkage rod to fork, or
5. OSS: riser + tiller bar above the knees
6. Drivetrain: Crankset (e.g., 48/38/28T) + bottom bracket, long chain (≈2–3 standard chains), idler pulley(s) with bearings, rear derailleur + 8/9/10-speed cassette
7. Wheels & Tyres: 26″ rear + 20″ front (common SWB) or 26″/26″; double-wall rims
8. Brakes: Mechanical or hydraulic disc brakes (front & rear), rotors 160–180 mm
9. Storage Box: 20–35 L lockable ABS/FRP tail box mounted behind the seat (quick-release bracket)
10. Controls & Safety: Shifters, cables/housing, mirrors, flag mast, bell, front/rear lights, reflectors
11. Other Hardware: Headset, stem/riser, hubs, spokes, pedals, kickstand, mudguards, chain tubes (optional), fasteners
12. Finish: Primer + powder coat/paint; anti-corrosion treatment for steel