Originally Posted by
Koyote
Many years ago, when my much-loved Avocet saddle wore out, I peeled off the plastic cover, peeled and scraped off the rotted, mildewed layer of padding, and was left with a bare (and hard) plastic shell. My local cobbler cut and glued on a thin piece of leather, and I used that saddle on a road bike for a few more years. It was a great racing saddle, as it weighed very little and was comfy for even the longest road races that I was doing at that time.
I have seen the same thing: Under some of the crappy ripped up vynil-covered saddles that I took off bikes to flip I found the same hard light-weight moulded black plastic "GRAND PRIX" shells you referenced.
For the most part, I donated them to a bike repair course and they wound up on kids' BMX bikes, probably never to be sat upon again.
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