It's a grey and purple Trek 2100 composite road bike, approximately 1993/94.Some identifying features are the back fender (the silver half, toward the front of the back wheel, is screwed on, but the black half is a removable fender), the blue grip tape is peeling on one side and has deep dings that look sort of like a bite mark, there are bolts to hold two water bottle baskets, but there's only one bottle basket, there are reflective sticks on the spokes of both tires, there is an attachment for a little computer on the front, but there's no computer, there's a flashing light (a tirefly) screwed on to the valve of the back tire.