This... Unknown brand, has a Grange Cycles sticker on the front tube. Shimano Deore XT group set and some funky forks. Paintwork poor, has been in my garage for over 15 years. Good for parts or resto.
Safe to assume the Suntour seatpost is seized in given there is no seatbolt in the frame. I think more likely Track Twos as the dropouts are inline and the blades don't taper, bolt layout looks the same too. Mavic headset too.