Probably a late 90s early 2000 Yamaha something or another rear wheel.
Looks straight, comes with rear rotor, no cush. White in color. 17 x 5.5, so 750ish rear wheel or more probably an FZR1000 rear wheel (or YZF1000 or the like).
Contact TAMMY at VANMAR for a screaming deal on this wheel!!!!
Tammy at Vanmar Racing
303-944-0334
vanmarracing@mindspring