Clunk

I disassembled a clunk of bicycle today. In these days, I dried to disassembled it by normal tools in my company. But, I could't. So, I bought a special tool for it by Amazon, because the tools was not expensive.
I could disassembled it easily by the tools. And I washed around there. And, I measured the dimension around bottom bracket.
The system of the dimension is very complicated. So, I might missed the selection of bottom bracket.