What OP might have also been concerned for, for this forum, is that some, the "classic", have smooth stems but for the last 5mm. Most, however are threaded for the entire length. Ugly.
Someone else may know, for further authenticity, whose presta valves are removable --weren't they all, in the day? -- and whose snap off if you try to find out.
Anyone still hot-vulcanizing patches to repair their tubes should also report where they stash their flammables and the clamps that fix them to the tube during vulcanization.
Harry Travis Pine Barrens of New Jersey USA
On Sat, May 8, 2010 at 1:18 AM, M-gineering <info@m-gineering.nl> wrote:
> Andrew R Stewart wrote:
>
>> Marten- Actually the wholesale cost of like tubed but different length
>> presta valves is not different by much. Now the longer PV tubes were more
>> initially expensive (at the wholesale level) a while ago. But what things
>> cost at retail levels is often about economics of scale at the manufacturing
>> stage, managing inventory cost and the competition throughout the supply
>> chain.
>>
>
> here
> conti charges the same for 42 or 60mm
> Schalbe's 60 are 25% more expensive, and a lot more if you take into
> account I can't get them in boxes of 50
> Vittoria charges 53% extra for a 51 over a 42
>
>
>
>
> --
> mvg
>
> Marten Gerritsen
> Kiel Windeweer
> Netherlands
> _______________________________________________
>
--
Harry Travis