Folding bikes have been improved greatly over the last few years and the same can be said about ours the nimbus 20 wheel folding bike mixes riding comfort and foldability perfectly using a 20 wheel platform the bike is stable at any speed and can be ridden with confidence but with smaller wheels than a standard bike it folds down neatly to be carried on board a train or bus or stored out of the way at home with 6 speed shimano gears telescopic handlebar stem and alloy components it