Interesting. I've never had an issue with mine and I'm using a Specialized pump. Have you tried contacting Silca? Are your extensions sized correctly and are not too short?

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I have not contacted them about the valve extenders. I am assuming there is nothing wrong with them - I (along with a few other folks I have had help me) am just for whatever reason incapable of using them without a huge headache. Until I put the disc cover on I never noticed the issue because I was using my over sized pump head that worked. I've had them for over a year at this point but just started using the disc wheel cover in the past month.

I did try to contact them when I thought the issue was the disc wheel adapter. If I recall correctly, they assumed I was using it wrong (might be correct) and referred me back to the retailer who sent me a replacement.

As a note, I like Silca. In fact I was a backer for the T-Ratchet + TI-Torque Kit and love that thing. They make some cool stuff. My intent here is not to trash them in anyway - just looking for a potentially better alternative. Maybe something with a longer threaded section that a pump head or the wheel adapter can latch onto?

What depth is your wheel, what size is the valve on the tube, and what size is your extenders?

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Make Inside Out Sports your next online tri shop! http://www.insideoutsports.com/

Front Wheel - Flo 60 (62.77mm), Vittoria Latex (51mm), Silca 34mm extension - total length = 85mm

Rear Wheel - Flo 90 (94.8 mm), Vittoria Latex (51mm), Silca 60mm extension - total length = 111mm

Plenty of valve sticking out (if not too much). The valve extensions came with the Flo wheels at their recommended length for use with 48mm valve stems.

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"It's good enough for who it's for" - Grandpa Wayne

Ok just wanted to make sure. I double checked the size chart and your extensions are correct. I would give Silca a call.

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Make Inside Out Sports your next online tri shop! http://www.insideoutsports.com/

I might do that assuming no one comes up with an alternative suggestion to try. Maybe they can provide a dummies guide to inflating your tires for me.

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"It's good enough for who it's for" - Grandpa Wayne