The most expensive bicycle in the world is generally considered to be the House of Solid Gold “24K Gold Extreme Mountain Bike,” valued at about 1 million US dollars.

What the bike is

This bike is a fully functional fat-tire mountain bike that has been turned into a luxury art piece rather than a practical trail machine. It was produced in an extremely limited run (reportedly only a handful of units), which also drives the price so high.

Why it is so expensive

• The frame and many components are plated in 24‑karat gold, giving it the appearance of a solid-gold bicycle.

• It features luxury details like an alligator-leather saddle, a jewel‑encrusted emblem, and hundreds of gemstones including black diamonds and golden sapphires, emphasizing collectability over performance.

Other notable ultra‑expensive bikes

• The Trek Butterfly Madone, a unique art bike by Damien Hirst linked to Lance Armstrong, has been reported at around 500,000 US dollars, placing it among the priciest road bikes ever sold.

• Art and luxury collaborations such as the Aurumania Gold Bike Crystal Edition and various special Trek art bikes also reach into the six‑figure range but still cost less than the 24K Gold Extreme Mountain Bike.