Tired of your dull BMX in GTA Online?
As far as GTA Online glitches go, this is as harmless and as useful as they get. While the game always featured extensive car customization, which has since been significantly expanded via the ever-growing Benny's Original Motorworks introduced in the Lowriders DLC, bikes haven't really gotten a lot of love. In fact, the non-motorized ones have no customization options what so ever.

With the size of the GTA V community being what it is, it should surprise no-one that there are a ton of demographics within it with different in-game interests and tastes. There are players who focus entirely on stunting and parkour maps, some players roll with a full-on biker style going on. Others have their own taxi service, or go hiking frequently across the landscape of Los Santos and Blaine County.
Of course, there is also a bicycling subculture in GTA as well, though these people tend to fit into the stunting community as well. The vehicle of choice for these players goes on two wheels and needs some serious pedaling work to reach high speeds. Unfortunately, the bicycles in GTA Online are as you get them — no upgrades or customization.