John,
I hope someone chimes in, because that is exactually my question. The bike is built double butted Specialized Touring steel. 1986 was the first year the Hopper was made and the 4th fourth the Stump Jumper I think. The Stumpjumer at the time had lugs. Both bikes had XT components and similar otherwise - and I think both had the label Specialized Touring Steel - thats why I think Tange?
Mike