What brand/year/make is this road bike? This is a mystery frame that I got and built with a lot of spare parts I had. Can someone help we identify it? Also the rims are 700c.
It's a Mongoose Detain frameset. Originally retailed for around 200 dollars at Walmart as a complete bike. 

Comparing the op's frame to the one above it's clear they're not the same if only because the backwards circle has a double seatstay sort of thing. Anyway, the frame matches a google image search so I'm 99% sure I'm right