Help "Designing" a micro mini for 4 year old
Looking for a quick good bike for my son.
Currently looking at Brew Micro mini frame.
Would like 18" tires and rims for starters and be able to convert to 20" at later date.
Frame is 360.00 and I'm curious how much the rest is gonna cost to build.
Looking for recommendations as to parts that will serve the purpose of a 4-6 year old (he's short) and keep the price within reason. If parts could be interchangable to a mini frame later that would definitely be a plus.
All help appreciated.