I got a new clamp for my Speedball seatpost,
it's the same as the Joplin. The original clamp
failed. I'm having problems keeping it tight.
The saddle won't stay put. I don't want to
tighten it anymore, I think something would break.
I've cleaned it up, there is no grease on it.
Mtbr's 2016 Winter Biking GearReviews and Roundups
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Thread: Speedball seatpost