Yes, there is a scientific reason. The black is carbon powder added to the rubber. Basically, carbon improves the puncture strength and tread wear resistance to rubber.
They were not always black. At one time, most of the pneumatic tires were white. But you were always fixing flats on these tires at the side of the road because the rubber was soft and gummy.
You research it, and it isn't always simple.
One can find discounted Michelin tires online at websites such as Discount Tires or Black Circles. One can also go to Canadian Tire, Walmart or Sears to find these tires for lower prices.
You can always check online at the Honda website. You may also find deals at one of your local car dealerships.
You can find tires for your car at firestone.com. Fire Stone always has great deals or offers on every product, this is where I buy my auto parts so I totally recommend it.
Big O Tires, Discount tire sales, and Tieman tires are all tire sales that offer both new and used tires. You could also find new/used tires on Craigslist.
Wal-Mart has some of the cheapest tires that you could find. They always strive to keep their prices as low as they can for their valued customers. They have them starting at $59.00.
Yes, black widows ARE always black. But, then again, not a lot of people get close enough to find out and live...
Many times you can find used tractor tires at tire business around you, I would call around first and compare prices as todays gas prices are insane, or you could always search www.ebay.com for used tractor tires.
try carfax.com
craigslist
WAL-MART. I love Wal-Mart, their prices are out of this world and service is not bad either. I always tires for my car there at a great price. Good luck.
You can find discount on tires in Gurgaon at Chunna Bhatti Chandimandir.