Item #70748 This decking comes in two formats, Option "A" and Option "B".  The standard fender width for 1/25 is 24.40 mm, for 1/24 the standard width is 24.07 mm, for 1/16 the standard width is  38.00 mm and for 1/14 the standard width is 42.00 mm. For minor adjustments to fender widths up to 2 mm +/- contact us once you have placed your order and the adjustments will be done at no additional charge.  For fully customized scaling for all four scales, select desired custom scale in the dropdown menu and send us you required measurements. All customized scaling must fall within 5 to 10 mm of the standard options available.