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Bicycle Mechanics - Silca Super Pista Problem

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Btflmutant

11-19-09, 05:38 PM

I posted this problem earlier today, but somehow it disappeared. Does anyone have a problem with their silca not letting go of a presta valve after you've inflated a tire? I've actually pulled stems off because it's on there so tight. Any help would be appreciated.

10 Wheels

11-19-09, 05:45 PM

I think the tube valves are defective.

I put a drop on oil in my pump heads.

Had three valves from different brand tubes come off this year.

28 flats ytd.

ls01

11-19-09, 05:58 PM

I used some silicon grease on mine, now I just wiggle it a little and pftt! Off it comes.

Torelli4

11-19-09, 06:41 PM

Just this yearI ripped out a couple of stems and couldn't get seem to always get a good seal. Since I'd had the pump for about 5 years I replaced the rubber donut. The pump functions like it's brand new now. Don't ask me why it was so hard to get off the stems before. You'd think it would've been be more loose.

Btflmutant

11-20-09, 07:13 AM

Thanks, I'll try silicone and if that doesn't work I'll replace the gasket again.

davidad

11-20-09, 10:16 AM

I put the stemnut inside of the rim. It keeps me from pulling the stem off the tube. You must be carefull and make sure the nut is not pushing the tube under the rim. Since I have been doing this I have not ripped off the stem.
My Silca pump head is hard to remove with a new gasket installed.

roadfix

11-20-09, 10:49 AM

I believe the brass chuck was originally designed for threadless valve stems. It's a joy to use it on smooth stems.

bleukahuna

11-20-09, 11:05 AM

I put the 90 degree lever lock head on mine years ago, eliminated the only problem I ever had with my Silca.