The standard bicycle chain size for most bikes is 1/2 inch pitch with 3/32 inch width.
The standard bicycle chain link size for most bikes is 1/2 inch pitch, which means the distance between each pin is 1/2 inch.
The standard bicycle tube size for most bikes is 700c.
The standard bicycle handlebar diameter for most bikes is 22.2 millimeters.
The standard bicycle crank bolt size for most bikes is 14mm.
The standard bicycle handlebar diameter for most road bikes is 31.8 millimeters.
The standard bicycle axle thread size for most bikes is 9/16 inch.
The standard size of a bicycle rear axle nut for most bikes is typically 15mm.
Bicycle chains are generally cut to size. But most derailer gear bikes use 114-116 link chains.
The most common bicycle chain sizes available in the market are 1/8 inch and 3/32 inch. These sizes refer to the width of the chain, with 1/8 inch chains typically used on single-speed or fixed-gear bikes, and 3/32 inch chains used on most multi-speed bikes.
Most bike parts are generic, and built to certain standards. As long as you're able to figure out which standard your bike is you can get parts for them from pretty much any bicycle shop. The bikes are made by/for a company called HM bikes.
The standard bike handlebar diameter for most road bikes is 31.8 millimeters.
The standard bottom bracket width for most road bikes is 68mm or 70mm.