It doesn’t, but don’t overestimate them. My 3year old son went straight from push bike to biking and learned in a week. It took a some running next to him and a few heart attack moments, yes, but he got it immediately. Your kid may start to over-rely on stabilizers and hence learn the real thing much slower IMO.

No it doesn't come with 'training wheels' or stabilisers, if that's what you mean. The best process for our 2 boys was to go straight from a balance bike (when they could coast and steer safely) to these great bikes, which are very light and easy for them to control. After a few days of pushing themselves along, they start pedaling with no need for stabilisers.