Quick turbo trainer question

thefd
thefd Posts: 1,021
edited April 2013 in Road general
My wife would like me to put her bike on the turbo so she can have a shot when the kids have gone to bed. Her bike is a mountain bike - so I would like to get a slick tyre for the back wheel. The size is 26 47/52. Can anyone explain that to me. 26 is presumably 26 inch diameter. What is the 47/52?

Would this tyre be suitable?
2017 - Caadx
2016 - Cervelo R3
2013 - R872
2010 - Spesh Tarmac

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