Originally Posted by
rothenfield1
I was wondering too. I never had a chance to look in the Miyata 1000's tubing to see if it was 'rifled' i.e. spiral; but I did check out the Columbus TSX frame I had and it was.
Here's a rendering of the splines from the '86 catalog, courtesy of miyata catalogs.com:
http://2.bp.blogspot.com/_whtVpXkKwl...600/img100.jpg
http://www.miyatacatalogs.com/2007/1...alog-1986.html