Alex may be on holiday, but Ollie makes sure your questions are answered within the allotted time!

In this edition of the GCN Tech Clinic, questions on bike computers, vintage wheels, tyre sealant, and of course everybody's favourite - waxed chains!


00:00 Welcome to #askgcntech
00:23 How does my head unit estimate calories burned?
03:28 False readings of waxed chains
04:49 Why air liners/tyre liners can slow you down?
06:46 Can I run 28mm tubulars on vintage wheels?
08:41 Do I have to clean tyre sealant if it is not in use for a long time?

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As Ollie said, if you have any questions, fire away using #askgcntech

Watch more on GCN Tech...
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📸 Photos - © Velo Collection (TDW) / Getty Images & © Sprint Cycling Agency

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