retrobloke
Dirt Disciple
Thanks for the replies everyone
The 1993 & 1994 Explosif had a ribbed down tube not a spiral.Tange made a spiral tubing like that. I know Kona used it on their flagship MTB in the early nineties. I have a weak spot for unusual tubing. I love my Colnago Conic SLX, as it was the first bike to have an expanding downtube. Love my lugged Gilco-tubed Cinelli MTB too. Two bikes I'll have 'til I die.