Ok, so this is tricky because as said in the earlier post the furthest extending parts are the folded up supports at each end of the bike platform but these are only at each end of the rack. At the badge the furthest extended part is the bottom rail, which I measured to be around 115mm (A). The part that extends furthest back overall is the supports at end of each side and using a few spirit levels I reckon these are around 160mm (B) back when the distance is transferred to where the badge is.