BH Bike Iconby Byron Published August 22, 2006August 3, 2016 Bike Plates Sponsored by the Bicycle Alliance of Washington, Washington State is offered share the road bike plates. As of August 1st, over 1150 plates have been sold, which explains why I’ve been seeing them so much! … We're riding townies, adventure, and mountain bikes. Find recommendations on our store page. As Amazon Associates we earn from qualifying purchases.