Shimano Tourney is a model of front and read deraliers, not a bike
try this web site http://techdocs.shimano.com/media/techdocs/content/cycle/SI/Tourney/RearDerailleur/SI-5V80A-En_v1_m56577569830612967.pdf
Shiman doesn't make bikes, only bike parts. And they have the whole range, from fairly basic stuff to real nice racing equipment. As long as you're aware about what to expect from the grade you've bought Shimano has a good reputation.
shimano dxr is the best for bmx racing
Shimano 600 components were introduced in the 1970s, and Cannondale did not begin manufacturing bicycles until 1983. Therefore, Shimano 600 components could be found on Cannondale bicycles from any model year, and the presence of such components is not a viable way to determine a bicycle's age.
IT would very much depend on the vintage and quality of the bike. If it's a fairly recent bike I'd just buy the cheapest Shimano derailleur with the correct hanger (either bolt on or integrated) and the odds are good that it will work.
On a MTB it's usually a clamp that goes around the seat post. On a road bike it can also be screwed on to a soldered tab on the frame.
Mercier has released many different models of bikes. Some of their bike model names include Shimano Equipped Steel, Shimano Equipped Aluminum, and Campagnolo Equipped Steel.
Shimano's population is 7,003.
Shimano's population is 975.
It's got Shimano 3x8, Acera. Entry-level stuff.
SLX bicycles are manufactured by Shimano, a well known and quality bike part manufacturer. Famous for their gearing systems, the SLX are featured in the top mountain bike brands, such as Marin.
Shimano.