Don't underestimate those Barbie bikes, some of them (but not the current ones) can be made to look quite good. There are several more serious options. For a modern sports bike there is this one, currently available in various colours, eg at Big Bad Toy store Road Bike (Baby Blue) 1/6 Scale Accessory (can't speak to this one personally). DiD French Resistance Pierre (Brad Pitt) came with a very good bike in the classic style DID F80078 1/6 WWII French Resistance PIERRE Brad Pitt With Bike Model INSTOCK | eBay Probably the gold standard is a company called Xonex, and they are probably what cdn_rhino is talking about. They make many different historical and current styles, licensing actual names and logos, and diecast in metal with working parts etc, so they're not cheap. (I got one that was missing a pedal so the price was less frightening).
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