>>989059only 2 ways I can possible see, maybe in combination
1) Rear section twists left and right directly below the seat.
2) Front sections Forks move up and down in different directions, tilting the front wheel left and right.
Guessing by the bikes setup, it does both and with the increases in complex mechanisms, will break down and require regular maintenance/parts replacements.
True improvements on the design on bikes includes longer lasting, water/mud/etc resistant materials that weight less and handle stresses/temps of the road better than previous materials.
Simplification and strengthening of gear shifting mechanisms
Lighting simplification/safety reflectors/paint jobs/etc
Suspension system improvements
-including tire lining to protect from glass/metal/thorns
-longer lasting/tougher/easily repaired inner tubes(solid tubes prematurely wear out/destroy spokes and bike frames/shocks)
-tougher/better transmition of pedals to rear/or front tire(chains are still king because you can almost always fix them in the middle of no-where with little extra weight versus whole sale replacements of belts/drive trane)
-brakes(each their own/ will always wear out because friction is how all breaks work) reduce failure rates/increase ease of fix/replace/reduced carry cost to fix/replace
Electric bikes have an advantage of relatively simpler drive(almost always direct transmition)(recovery of power on down hills/braking)
Negatives of expensive/high weight/long charge/sensitive batteries/power supply.
Gas/motor
-VERY WELL developed(motorcycles anyone??)
-VERY CHEAP FUEL(100 mpg mopeds/motorcycles are entry level)
-High maintenance/high license/insurance/large amount of personal protection required/low traction in wet weather/winter not safe at all(winter biking is doable just because of extremely fat tires/good brake/gear setups)
