You can put a Super Moto X (2.4") in the rear and Big Ben 650B (2.0") in the front. Visual wise they both look very similar, Super Moto X looks like beefed up Big Ben.Your right Ravi do you have enough room. I wanted so bad to put them on my new EVO 27.5 the rear would fit but I
measured for hours and with the help from very nice people at Schwalbe (and exact dimensions ),it would rub on the fork cross
brace. But these are down scale Suntour forks.
27.5 x 2.40” (62-584 ETRTO)
Mounted on 21mm (internal width) rim
Width of tire at widest point (outer casing sidewall): 61mm +/- 2mm
Height of tire from top of rim sidewall/lip: 58.25mm +/- 1.5mm