When the say the size of bikes what are they measuring on the bike?
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.
1099013
well, since your other question dealt with threaded vs. threadless steerers, I'll assume you're not talking about new technology.\n\nA lot of the time, bike types are referred to by the diameter of the wheels, 20" bike is a standard BMX type, for instance.  26" used to be a fairly popular size for '10 speed' road bikes.\n\nA 66 cm bicycle frame is HUGE, most manufacturers standard sizes stop at around 60-62cm.\n\nThe way to find out what size your frame is would be to take a tape measure and find the distance between the middle of the crank axle and the middle of the seat tube/top tube junction on a standard diamond farme.  Basically, you're measuring the length of the seat tube.  For more information, refer to the website below.
228405
When you see a size like 16" or 20" or 24" this refers to the wheel diameter. So you would measure the diameter of the wheel.\n\nThe other measurement is frame size -  this tyically is the length of the tube the seat post slides into. \n\nHope this helps
55982
for measuring the length of things though each gives you a different unit.
1046463
approx\nnew bike 60-70kmpl\nold bike 45-50kmpl\nnow multiply by 2.617litres
343636
The correct method of measurement for an 'English' saddle is different from the method used for a 'Western' saddle.   We find that many US riders often specify their saddle size as smaller than really required. For example, a Western 15" saddle equates to a 17" English saddle.
1099358
The kind that hold 4 bikes! LOL check with your LBS.
835130
The word you're looking for is "measured"..?
285712
I have made and ridden motorcycles for 20yrs and the biggest factors with tyre sizes are stabilty from centrifugal force. Bikes with small wheels are unstable at higher speeds, they are inherently closer to destruction because at the same speed a smaller tyre is revolving faster. Tyres are critical on bikes. As a bike leans in to a corner, the tyre, because of it's shape or profile, increases in contact surface to counteract the amount of force pushing the bike to the outside of the corner. These forces get to a certain point before the bike will slide and crash. Things that affect the performance of this are, heat in the tyre, weight vs power vs tyre size, tyre profile, diameter, motorcycle geometry.\nBasically you do not change wheels or tyre shapes on a bike unless u are prepared for the consequences. Harleys may put really big tyres on but they are not performance orientated. \nAlmost all bikes these days have a 120/70 17inch front and depending on power a 160-200/55 17inch rear. Most bikes pre-1988 ran 18inch(or bigger) tyres. The simple reason for this is stability vs steerablity. 17inch is the best compromise. If you are designing a bike, stick with these sizes and work on suspension, geometry and weight distribution as they are more changeable. cheers Neil
236276
It usually depends on who your customer is.  If you mean metric or inches.  Automotive, Medical uses metric, but most other industries still use inches.  I am automotive mostly we use ISO as a dimensioning Standard
956062
Hiya,\nI cant find the weight but to be honest I can't be bothered to read thru it all but here's the thing Ive found:\n\nhttp://www.mongoose.com/bikes/detail.php?id=493&brandLine=Pro_International&brandID=83\n\nSorry if its no help but Good Luck   :-)
302252
You are looking for the amount of work done by the bicycle.\nWe know this value will be less than 5.4X10^3 J because energy is always lost when using a machine.\nIn addition, the answer is equal to the efficiency (62%) times the amount of work the cyclist does. \n(I wouldn't be right if I did your whole homework problem so I'll stop here)
767443
Usually, 700C x 45 tyres will fit. \n\nCuriously, after only a few years of using the 28" designation, a change was made that changed how tyres were measured.\n\nYou might even find some 700Cx45 tyres also labeled as 28x1-1/2
848353
Best to take hi or her to the eqipment shop and get them measured there
286847
you're probably looking at a 14"-15" inch frame.  size small most likely.
1027822
Seat posts range in size.  With most common being 27.2 mm.  There are 26.4, 27.0 etc.  Do not guess, if the seatpost is too small and you try to ride on it, it can irreversably damage the frame. If it's too large, then obviously it will not fit.  The way to go is to take the bike to a bikeshop, they will have a special measurment pipe that's inserted into the frame and tells you precise diameter.  Seatposts are not cheap, but it would make sense to buy at the bike shop as well, rather than to wait for 2 weeks on ebay and save 10 bucks.  \nTo prevent stolen seatpost get a special leash that goes on the seat and attaches to a frame ($6) or go for extra cool and secure Onguard seatpost skewer (usually $50 in a set along with two wheel skewers).
206912
Check this site about bike laws. They vary by state.