Im buying a mountain bike because it fits my style more, feels better and looks better than a road bike...plus I like to do some stunts (like wheelies, jumps and drifts). But I wont be riding it on mountains or anything, just on the road and maybe some trails from time to time. So I need to know which tire size is faster on the road? Is it the 29ers? Or 27.5"? Or 26"?
Also btw, these are some bikes Im considering right now, so if you tell me which one you think is best, i would really appreciate the advice!
-Rockrider 540 -> https://www.decathlon.ie/rockrider-540-mountain-bike-en-s120355.html
-Giant ATX 2 (2017) -> http://www.giant-dublin.ie/en-ie/bikes/model/atx.2/28587/101110/
-VooDoo Aizan --> http://www.halfords.ie/cycling/bikes/mountain-bikes/voodoo-aizan-29er-mountain-bike
-Carrera Vengeance --> http://www.halfords.ie/cycling/bikes/mountain-bikes/carrera-vengeance-mens-mountain-bike-black
-Carrera Vulcan --> http://www.halfords.ie/cycling/bikes/mountain-bikes/carrera-vulcan-mens-mountain-bike
Also btw, these are some bikes Im considering right now, so if you tell me which one you think is best, i would really appreciate the advice!

-Rockrider 540 -> https://www.decathlon.ie/rockrider-540-mountain-bike-en-s120355.html
-Giant ATX 2 (2017) -> http://www.giant-dublin.ie/en-ie/bikes/model/atx.2/28587/101110/
-VooDoo Aizan --> http://www.halfords.ie/cycling/bikes/mountain-bikes/voodoo-aizan-29er-mountain-bike
-Carrera Vengeance --> http://www.halfords.ie/cycling/bikes/mountain-bikes/carrera-vengeance-mens-mountain-bike-black
-Carrera Vulcan --> http://www.halfords.ie/cycling/bikes/mountain-bikes/carrera-vulcan-mens-mountain-bike