They MIGHT take 28mm, (I haven't tried it on mine) but it would be very tight indeed if they will. The new Defy Disc would have better tyre clearance. I imagine that they would take 28mm without issue. They come with 25mm, but mudguards (I used Crud Roadracers) will only fit without rubbing with 23mm.
I've got a 2015 Defy 0... GP conti 2s 28 fit fine on rear but no room for anything else. When fifted to the front wheel they just barely rub on the brakes so o need 25s on front..
I could not fit 28mm Continental GP4000 II on my 2014 Defy with the specific Giant Defy Guards, I tried with a couple of different rim widths.
I really like the Revolt. It's a little heavier (of course) but it's comfortable and handles well. Not quite as responsive as the Defy, but a bit more relaxed. I'm running 28mm slicks on it as I use it 99% on road.
Thanks Mike, not sure about the look, the sloping top tube and back end look a bit odd to me but, will see if I can get a test ride. At the end of the day, its the ride not the looks that really matter. Cheers
It is odd looking, but it seems to work. I fitted a rack to mine so it does light-touring duties as well, it hides the odd rear end somewhat