Originally Posted by VegasTriker

Here's something to complicate matters even more. The bike you are looking at comes in three frame sizes. From the description of your height 5' it is obvious that you should get the smallest frame size. In case the salesman does no know how to measure the frame size, it is the distance from the center of the crank to the top of the seat tube (the part of the frame in which the seat post is inserted).

Here are the specifications as listed on the industry website bikepedia for the 2014 model year

2014 Trek Shift 2 WSD
Bicycle Type UNSPECIFIED Bicycle Type
MSRP (new) 0
Weight
Sizes 13.5 in L, 16.5 L, 19 in L (343 mm, 419 mm, 483 mm)
Colors Ecru Pearl, Sparkling Silver
Item ID 9258879
- See more at: 2014 Trek Shift 2 WSD - BikePedia