How can you tell how many speeds you have on a bicycle?
960317
Technically your bike has 21 gears--the number of rings on the front times the number of rings on your cassette in the back.  However, you don't really have 21 usable different gears.  This is because:\n\n1) Depending on how many teeth are on your chainrings (front rings, you have 3) and your cassette (7 rings on back), you may have some gears that repeat.  It is all about the ratio between the front ring and the back ring the chain is on.  For example, let's say your middle front ring has 38 teeth and one of the rings on your cassette in the back has 19 teeth, you have a ratio of 2 to 1 when your chain is on these two rings.  If your smallest ring in the front is 28 teeth and your smallest ring in the back is 14, you again have a ratio of 2 to 1, so these gears are actually the same.  \n\n2) There are also certain gears you should not use.  You should avoid cross-chaining--being in smallest ring in front (closest to the bike, on the inside) and the smallest ring in back (farthest away from the bike) or largest in front (farthest away from bike) and largest in back (closest to the bike).  Either of these gears, or close to them, puts a lot of stress on your chain because it torques it sideways.  This will cause additional wear on the chain and shorten the life of it.  Most bikes will allow you to do this because the chain is put at a length to allow for it, but it will also likely cause your chain to rub somewhere and also possibly make your bike not stay in gear very well.  \n\nHowever, these days, rather than multiplying the number of front and back rings to get speeds, bikes are now often referred to by the number of rings on the chain ring and cassette separately.  You ride a 3 by 7 (3x7).  A double road bike with a 10 speed cassette (typical of today's high end road bike) is a 2x10.  A more touring oriented road bike often has a triple chainring and is likely to be a 3x9 or 3x10.  A fairly typical mountain bike is a 3x9, but there are a lot of 2x9 or 3x8s out there too.
377707
That has nothing to do with speed. Click start and get into your control panel where it says C: or D: depending on your make and model Right click and hit properitys, Thats your space. Now open up your control panel again and look for a icon called System, click it, thats everything you need to know about your computer speed.
891081
Actually, contrary to an answer above, braking on a bicycle, when done correctly, is about 80% front wheel and 20% back wheel.\n\nIt is going to be tough to come up with a new bicycle design, as most builders primarily concentrate on improving the performance of an already proven format. Going outside that format is both very expensive and is often met in failure.
946694
Gears on a bicycle are really only there for one reason.\n\nIt is so you can maintain your speed and/or cadence (pedals per minute) over varying terrain. Maintaining cadence is a pretty essential part of riding efficiently.\n\nSo, lets say that you are pedalling at 60 rpm on level ground and you come to a hill. The incline of the hill forces you to either increase your power to the pedals, slow your pedalling, or both.\n\nSince you want to maintain your cadence, you reduce your gear and take the reduction in speed.\n\nYou'll also likely find the most advanced designs on multigear bikes, so that is another thing to think about.
439730
107.23 mph.  Do I get 10 pts?
259433
try now at: http://www.pedalinghistory.com/
370194
its 225 mph or 362 kmph
674183
I have been cycling for about 15 years. The best way to train for cycling is to be a 'spinner' not a 'grinder'. A spinner is someone who is constantly pedaling. The key to being a spinner (i have found) is train your body/mind to downshift BEFORE you need it. If you are pedalling and you think that there is 'too much resistance' at the pedal (aka--that the pedal is getting hard to push) then you are downshifting too late. Lance Armstrong is a excellent example of a spinner. \nA grinder is someone who uses a higher gear that generates a lot of power, but generally that uses a lot more energy from pushing a higher gear.\n\nMy personal favorite way to keep my spinning technique up is to use a computer that measures your cadence. Normal bicycle computers mount a sensor on your front tire and fork. This measures how fast you go, but you could ride a down a mountain at 25 mph without pedalling much--and that would not necessarily be a good overall training indicator. A computer with cadence mounts on your crank and it measures crank rpm. If money is no object, you can get gear that measures the amount of watts you are producing. This can get pretty pricy though. \n\nHope this helps you out.\n\nIf you have any more questions (need gear recommendations or anything). Feel free to email me at whostolemymojo at yahoo . com\n\n=)\n\nOh and to answer your original question. I watch a lot of cycling on t.v. myself. Most riders maintain a constant (fairly constant) pedal cadence. This definitely varies when they are riding in a pack as drafting or obstacles (riders in front and/or on both sides of you) take place. You might have to coast/stop your cadence momentarily in those circumstances. Also, weather, terrain--down a steep mountain grade, curves, etc can affect you as well. Watch more racing and see how often most guys pedal. You will notice it is almost always non-stop when there is no outside factors hindering their progress. The key to cycling is to go as fast as you can while expending as little energy in the process--hence drafting is a great way to conserve energy for the sprint at the end of a race.\nUnfortunately, if you are training for triathlons, you will not have the good fortune of drafting--triathlons have many rules prohibiting drafting.\n\nGood luck!
210959
Maybe the following picture will give you an idea:\nhttp://pg.photos.yahoo.com/ph/dpeter508/detail?.dir=/c51a&.dnm=b97fre2.jpg&.src=ph\n\nThis is a binary pattern painted on the shaft, with three sensors (red dots in the pic).  The outermost sensor will detect black and white squares, and can determine rotational speed based on the rate that the black and white squares go by.  As the shaft rotates, the sensors will detect the 3-bit pattern painted on the shaft at any point.  If the shaft is turning in one direction, the pattern will appear to "count up" or down depending on direction.
101070
There's no spec on this, since it depends on the weight and number of riders (up to 3). Reportedly online, some have said upwards of 50 mph.
538198
It depends on the bike. The kind of bike you might buy at a toy store is measured by the wheel diameter. More expensive bikes for serious cyclists, measure the wheel diameter and the frame.
687139
I don't know has the speed and or revolutions ever been measured before for it? Good luck!!!!
1077010
All I can think of...\nGravity (weight of bike + person), friction (of ground and all axles), pedal force (not constant because you are pushing on an arc), air resistance, inertia (this is why it gets easier to pedal once you get to constant speed), sprocket ratio, gyroscope effect (makes it easier to balance).
729580
I suppose your talking about High gear or Low gear.\n\nLets say 1-18.\n\nLower gears like 1-10 will be tougher to pedal. And are great for going up hills or getting a leg workout.\n\nHigher gears like 10-18 will be looser and easier to pedal. Great for flat surface or going down hill.\n\nSpeed is only a factor when the amount of force applied meets the momentum required to achieve the speed.\n\nIf your legs are strong enough in low gear you can push hard and move fast. If you've got some good cardio going, that you can really get moving in a high gear too.
1162904
You can use these to find the year the bike was produced. Use a search engine to find a Schwinn site that deals with the "vin code" on your bike. if you already know the model bike it is, look under that series then they will typically have the years and the serial numbers that were put on bikes made in those years. good luck, you might find out your bike is worth more than you thought... i made $100 off of one i found in the trash down the street once on ebay lol.
221158
A good site is Weight Weenies.  Shows the weight of many bicycle parts.
972585
When you are doing each, stop and take your heart rate (radial pulse in the wrist is probably easiest) for 15 seconds.  Multiply that by 4 and that's your heart rate.\n\nYou can then compare the two.