This might be of interest to someone here. My son has outgrown his XS Nickel so moved him onto a larger frame. This fits perfectly for kids from 4'8" to 5'1" or so. Can push slightly to 4'6" with a shorter stem, but 5'1" is about as big as will fit.

Santa Cruz Nickel LT XS - Buy and Sell and Review Mountain Bikes and AccessoriesPaid Spam XS Santa Cruz Nickle FS-p1000105.jpg