tacx turbo trainer tyre

Tomc273
Tomc273 Posts: 29
edited December 2013 in Workshop
Recently bought a turbo trainer tyre and was wondering if it replaced the original tyre or went over the top of it? I have 700cx25mm tyre on at the mmoment and I bought a 700cx23mm trainer tyre. Will it go over or do I just need to replace the tyre?

Cheers

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