The most obvious difference is that the 20" bike has 20" wheels and the 26" bike has 26" wheels. After that it's details like how the bikes are intended to be used. A 20" bike is likely to be a BMX, good for tricks, stunts and short courses, but not so sutiable for longer rides. A 26" bike isn't as nimble for tricks, but better at going faster and longer.
No set answer to that.
You can get department store bikes for USD 100-200, or race/competition bikes for USD 2000 and up.
Or get one from Craigslist, yardsale or similar for maybe USD 15-50.
The size of a child's bike ranges from a 12 inch wheel size for ages 2-5 to a 24 inch wheel size for youth ages. Usually a child with a height of 28-38 inches will need a 12 inch wheel size while a child that is 48-60 inches tall will need a wheel size of 20-24 inches.
A 20 inch tire.
It depends on the bike your getting. most wieght 20- 27 pounds
Depends what size you are im 5 feet 10 and i ride a 20 inch bmx bike
Neither is better than the other It's simply down to personal preference Some factors to consider are: 20 inch bikes are easier to jump and you can jump higher 24 inch bikes are better for jumping large gaps on, and will often have better brakes than 20 inch bikes (20 inch bikes usually have U brakes while 24 inch bikes have disks)
The difference between 110% and 20% is 138.4615%
Mountain bikes have a taller scale than 20 inch bikes, but are better suited for outdoor ruggedness.
The 20" will ride smoother on uneven ground, but IMO 3-speeds aren't enough. with 3-speeds you get fairly large jumps between the gears. If it was me I'd go with the 6-speed.
20
20
What is the difference between 10 and 20 volume creme developer?
The difference between +120 and -20 is 140 degrees.