My son is 5 and his current bike is a 12 inch Huffy from Target.
He rode on the training wheels last year and now I'm trying to teach him to ride without them. We went to the park today for practice and I noticed that the seat is too low for him and the seatpost is too short to move the saddle up where it should be.
I ordered a replacement seatpost today (which I may have to saw off, it's 300mm). I haven't checked yet how high I can raise the stem, but I'm sure not a whole lot.
So I'm wondering if I should move to a 16 inch model bike, or just keep tweaking the 12 inch until he's ready for a 20 inch (I'm not sure when that will be). My first thought is go for the best fit, but then I'm wondering, how important is the fit for learning to ride, he's not riding long distance, just learning the mechanics. Obviously his knees can't be hitting his elbows when he pedals, the longer seatpost should help that.
While we were at the park, two different 7 year old kids asked to ride it and they tooled around no problem. Heck, I can even ride the thing. I guess it would not be such a big deal to drop another $90 at Target, but I'm hoping to build him a bike and I don't think that will be very feasible until he gets to the 20 inch size.
Thanks in advance,