Great question — answering as the UphillTech team:
Fairly common late 1990's 'copy' of the original Specialized FSR Stump jumper, using a single pivot rather than the Horst link Specialized used (which was patented back then). Several manufacturers toyed with this 'kinds a motorbike' frame design before falling back to more traditional 'tubes' design. Weight was always a problem as soon as you moved away from a triangle and had cantilevers with open ends or solid beams instead of rear triangle. Great thing about that era was frame designers were 'brave enough to be different' and so were consumers. Shimano Deore indicates either a reasonable quality bike or it has been upgraded. Deore (on its own) was re-introduced as a name in 1999 with 9...
Full answer by mattnz: https://bicycles.stackexchange.com/a/93704 (CC BY-SA 4.0).
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