Shimano FH-7370-R is a 7-speed freehub that has been improved in terms of spoke holes, sprocket spacers and freewheel body. The sprocket spacer now features a different color (brown) and thickness (3.3mm), with space between gears reduced by 0.25mm per gear. The freewheel body length is reduced by 1mm and has a notches for distinction. Spoke holes are cut at a slant to enhance durability of spokes.