FiveAlpha
Retro Guru
It's not Gilco tubing, it's regular Columbus pipes that someone has fluted, after purchase. I've seen quite a few frames with fluted tubes, including one which seemed to be fluted SLX.
My guess would be that anyone can flute tubes after they've bought them from Columbus (if they have the means), but perhaps 4 flutes is a copyright of Gilco, as I've only ever seen 5 flutes.
My guess would be that anyone can flute tubes after they've bought them from Columbus (if they have the means), but perhaps 4 flutes is a copyright of Gilco, as I've only ever seen 5 flutes.