When using a Shimano 12-30 10-speed cassette on a bicycle, it is important to consider the compatibility with the rest of the drivetrain components, such as the derailleur and chain. Ensure that they are all designed to work together with a 10-speed cassette. Additionally, consider the performance implications, as a wider range cassette like the 12-30 may affect shifting smoothness and overall gear ratios compared to a narrower range cassette. Adjustments may be needed to optimize performance and ensure proper functionality.
Bicycles rarely become valuable collectibles, so probably not a lot. Have a look for similar bikes on eBay and craigslist to find out what they are selling for.
There are 2 main reasons, first is that with every up-shift of the transmission the mechanical advantage of the gearing lowers.( example: riding up hill on a 10speed bike in 1st gear vs.10th gear, 1st is easier.) The second reason is that wind resistance increases 4times when the speed doubles. (example: sticking your hand out the window of a car going 20mph vs. when the car is doing 100mph and you'll feel the difference.)Wind resistance is main limiting factor for top speed o most sports cars.
That depends on what you mean by "fast".Here are some statistics, from which the answer to the questionyou actually have in mind can probably be teased out:Celestron 8:Objective mirror diameter . . 8 inchesObjective mirror area. . . . . 50.3 square inchesFocal length. . . . . . . . . . . 2,032 mmFocal ratio. . . . . . . . . . . . f/10Speed. . . . . . . . . . . . . . . solidly anchored for observingHST:Objective mirror diameter . . 2.4 meters (94 inches)Objective mirror area . . . . . 7,012 square inchesFocal length . . . . . . . . . . . 57.6 metersFocal ratio . . . . . . . . . . . . f/24Speed . . . . . . . . . . . . . . . 4.66 miles per second (16,800 mph)And PLUS . . . Hubble operates with zero atmospheric absorption or turbulence.