My info about the main tubes come from the sticker attached to my former 86 Technium 440 and Raleigh USA's brochure. The frame sticker looked like this one off an 88 model.

I believe I have a similar sticker on my unknown-year Technium Pro.
Did they make ongoing manufacturing changes through the Technium product cycle? Could the 6013 tubes be spec for their Mtb's?