Kris Green wrote:
>
> Howdy, Greg. Welcome to the list.
>
> Regarding your 1983 question; the list-keeper bumps the limit every year to keep
> it 20 years back, but there were some interesting forces at that time:
(cut)
> --Specialized introduced the Turbo line of tires, and Mavic the GP4
> high-performance clincher rim, offering an alternative to sewups.
Actually this happened quite a few years earlier. Michelin intro'd the Elan folding light weight clincher around 1975(?) and Mavic made the matching Mod. E ("E" = Elan) rim. There were also narrow clincher rims (13mm inner /19mm outer width) by Super Champion /Wolber, Ambrosio, etc.
The Mavic GP4 was actually a sew-up/tubular rim.
Chuck Schmidt L.A.
.