This is where things get interesting... 

Tops:

Start things off with a Merino Base Layer. If the ride starts cold, but is going to get warmer throughout the ride, a Micro Climate Jacket or Micro Climate Vest will be perfect for laying over your warm weather top. If its in the low end of this zone, go for the Merino Grid Thermal, the upper end choose the LS Micro Grid or a SS jersey with Arm Warmers. 
Cold hands? We have DnD Gloves and Merino Knit Gloves

Bottoms: 

This is a great zone for our Stretch Knit Leg Warmers to come in. Extremely versatile in many temperature ranges, these can span the cold start and come off if it warms up.