adult electric tricycle is good for old man.all parts is good quality brand  parts .   1.frame use front 24*4.0 rear 20*4.0 kenda with 6061 Aluminum alloy frame.    2. motor  use 36v250w / 48v500w/48v750w bafang motor power .  3. battery  use 36v or 48v10.4ah /14.5/16ah panasonic or samsung  lithium battery   brake system  use tektro mechanical disc brake      4. front fork use no suspention alloy front fork or MOZO suspention front fork.  5. display use King-meter LCD or LED display /APT brand LCD display   6. alloy rear basket with LED light . 7.wellgo alloy pedal .  8. velo  leather grip and saddle . 9.promax  seat post and handlebar  prowheel crank. 10.front &rear LED light  .11 KMC chain.  12.shimano altus 7 speed