Hi. I need a new chainring for my lafree lite. its 37t. I followed fleccs link and have had a duscussion the Giant at Shoreham. They can provide a chainring kit that has 37t and 28t chainrings. They need to be ordered from holland but they dont have any more information. at over£80 i want to make sure theyll fit. does anyone know what this kit is? do they bolt to a slier etc??