It's a bike frame that measures 18" from center of bottom bracket to top of seat tube. 18" would be just a tad shy of mid-sized.
no a lawnmower engine is too big try a weedwaker engine
It depends on the bike, the size of the frame, number of gears and the size of the sprockets and the chainwheels. In short the chain has to be fitted to the bike, and for that you need a chain breaker tool. Easiest way to get it back together is to use a quick link / master link.www.sheldonbrown, www.parktool.com and www. bicycletutor.com have instructions on how to size your chain, but basically it should be long enough to go round big-big + 2 links.
Huffy mountain bikes are available in most big box stores. (i.e. Walmart, Kmart, Target, etc.)
On modern Big Twins the VIN is stamped into the frame on the right side just below the steering head. On Big Twins made before 1970 there is no frame number; they use the motor number for their VIN.
It depends on the type of bike cause if its a bmx bike or something related to it then it will be small but if it is a mountain bike then it will be bigA bike can be as big as you want they come in all different sizes there could be a 2 ft. bike or even a 2 in. bike. Of course the 2 in. bike would be a barbie doll bike.
If your still quite young then 18" but 16" other wise
Bicycle sizing is very personal, and depends on many different dimensions of your body, not just your height. A reputable bike shop will be able to offer you a fitting service. This can ensure that you get the right size of bike, including changing certain parts of the bike if necessary.
The Big Bear Mountain Resorts are located in South California. In order to access the Sky Chair with a bike you must wear a helmet. One's bike must have a breaking system of some kind, though BMX bikes or bikes without both front and rear hand breaks are not recommended.
Depends on how much too big it is, you need a bit of clearance between top tube and crotch to bunny hop. As long as you have that you can bunny hop.
21 is probably the measurement in inches, which works out as 53 cm. Trouble is, there's no telling if this is the top tube length or the seat tube length. For a road bike, it's probably the seat tube height for a mid-sized bike. If it's seat tube for a MTB, it'd be a big bike.
Three kids on one bike, that's a tall order. I thing the best option - if they're small - would be a Bakfiets, a Dutch cargo bike. From the bars and back it looks like a normal bike, but ahead of the bar the bike has a stretched, low frame that holds a big box. Or you can have one in a seat on the rack and two in a bike trailer. Or one on a generation tandem, one in a seat on the rack and one on a trailer bike. Or get a stretched bicycle, a Surly Big Dummy or an xtracycle, which can fit two child seats, then add either a trailer bike or a bike trailer.
a bernese mountain dog is a big mountain dog