the swytch conversion for this two wheeler: a 1985 panasonic 21 speed, with 27 inch wheels, was completed maybe 9 months after placing the order. very long lead time to get the kit, including a few delay notifications. it appears that components were shipped in two packages from different supply centers. the pricing seamed to be fair given any other alternatives for an on-line order of chinese components for a diy build. not knowing the cable lengths required and the exact battery placement, the longer cable length was selected. however, the cable for the on/off and speed selector to be located on the handlebars, was about 6 inches short to make a neat and tidy install on this bike. the battery was mounted on a third party front fork package carrier while the cabling was packages into a third party gear bag to adhere to the bike frame. The power wheel replacing the front wheel is only 250 watts on this build. it does provide a medium boost for uphill riding and with the control system, is only powered when the pedal crank is rotating forward. so when coasting, the front wheel actually induces drag and slows the bike down quicker than a non powered front wheel. the bike tires were upgraded from a width of 1.75 inch (4.45 cm) to 1.95 inch (4.95 cm), providing better tread for smooth and rough road surfaces. this bike has a three gear crank, and the swytch boost is proportional to the crank rotation, there is a "learning curve" to understand and realize the "boost" effect during varying grades surfaces of roads and trails using the three gear selections. one issue that was not really understood when placing the order for the kit, the kick stand mounded astern of the crank had to be replaced because of interference with the kit supplied crank sensor. kick stand was replaced with with a rear frame mount unit. spend an additional $100 to complete this build: new tires, rack, cable pack and kick stand. over all, a reasonable kit to upgrade this older bike.