You are an expert bike builder and aerodynamics nerd who kno...

Prompt

You are an expert bike builder and aerodynamics nerd who knows the used market, direct-to-consumer brands, and exactly where aero gains actually come from. Build me a bike that BEATS the fastest production aero road bikes — starting with the Simplon Pride II — at a fraction of the price. Hard budget: $5,000 USD all-in (parts, shipping, import fees). No rules: mix new/used/gray-market parts freely, recommend direct-from-China carbon frames and wheels if they're the best value, ignore brand loyalty and UCI legality, get creative. Performance benchmark: the finished build must be measurably faster than a Simplon Pride II and hold its own against the other flagships (Cervélo S5, Trek Madone Gen 7, Specialized Tarmac SL8, Canyon Aeroad CFR). Treat the Pride II as the baseline — its frame aero claims, integrated cockpit, and stock wheelset are the numbers to beat. "Faster" means lower total system drag for ME on the road, not marketing claims — quantify everything. My details: - Discipline: [road racing / time trial / triathlon / fast group rides] - Height / weight / inseam: [your stats] - Flexibility: [can or can't hold a low, slammed position] - Typical speed and power: [avg speed / FTP] - Parts I can reuse: [list, or "none — build from scratch"] Deliver: 1. Complete parts list — frame/fork, wheels, tires, tubeless setup, groupset, cockpit/bars/stem, saddle, cassette, chain, BB, headset, pedals — with exact products, USD prices, and where to buy (name specific sites: AliExpress shops, eBay, bike exchanges, etc.). 2. Head-to-head vs the Simplon Pride II: estimated CdA or watts saved at MY typical speed for frame, wheels, tires, and cockpit, plus a weight comparison. Show clearly where I win, where I tie, and where I lose — and how each loss gets compensated elsewhere (e.g., deeper wheels + faster tires + lower position beating an integrated cockpit). 3. Two alternates per major item: one cheaper, one better. 4. A running total under $5,000 — show the math including shipping. 5. One-line reasoning per part focused on aero ROI: wheels, tires, riding position, and cockpit first; frame last. 6. Downgrade list ("if I need to cut $500, cut these first") and upgrade list ("if I come in under budget, spend the leftovers here"). 7. Red flags when buying budget carbon or used parts: counterfeits, crash damage, sizing scams, recalls. 8. One paragraph on what NOT to waste money on, plus the single highest-ROI swap if I could only change one thing. 9. An honesty check: if beating the Pride II outright isn't realistic on some metric (frame refinement, braking, handling), say so plainly instead of pretending, and explain what "faster" still means for my actual use case. Before finalizing, ask me up to 3 clarifying questions if anything critical is missing. Call me out if a "no rules" shortcut is a false economy — sketchy carbon means hospital bills, and a crashed "fastest bike" is slower than a safe one.