According to the manufacturer (http://www.followme-tandem.com/followme-f...): All 26" - 29" (up to max. 2.6 tyres, depending on tyre profile) with and without rear suspension ("Fully") with quick release wheel mounting.
Wheels with solid axle, thru axle or hub gears can be prepared with optionally available adapters.

So this is likely to be rather tight...