I have one set of 126 wheels I respaced to 130 by adding two spacers. Unless you've had the wheel since they were new...
But when 130 became common for road bikes, I imagine even the cheaper hubs in 7 were spaced that way so Trek didn't have to produce different frames for the 1000 vs the 1400, for instance. 8 speed was reserved for nicer groups in that period.