I think the exact method falls under personal rituals, but almost everyone I know prestretches tubulars. For high quality high-pressure ones, I'll inflate to more like 150 psi and leave them for several days if I'm not in a hurry. Some of the old tubulars, expecially Japanese ones, were damn near impossible to mount without prestretching.
I personally only apply one layer of glue, to the rim. My method is to inflate the tire just enough to give it shape, roll back a short section away from the rim, apply glue, then roll the section of tire back onto the glued rim. I work my way around in this way until the entire rim has been glued. Then I straighten the tire, infalte to maybe 150 psi again, and let dry for at least 24 hours.
I know some people apply multiple layers of glue, but I've never heard a good explanation of why this would be necessary.
For cheap tubulars, the above method stiil works, but perhaps at lower maximum pressure.
Regards,
Jerry Moos Big Spring, TX
Erik Jos Olsson <sparklinglime@mac.com> wrote: I'm about to glue up my first set of tubulars, and I've heard
that over-inflating them to 120 psi or so for 24hrs. before hand
to stretch them out, helps when you go to push/pull them around
the rim. Does this damage them, or over-stretch them in any way?
Also, should I apply one, or two layers of glue to the rims before
the final layer? And how many layers to the base tape of the sew-ups?
Any help would be greatly appreciated.
Erik "nervously caressing my new Nisis" Olsson Rochester, NY