I'm one of the mini surfers - I just noticed this post.
If I had to guess, the rear are 4 by 110 and the front will be 4 by 144. Same as it big brother DS450 OR Honda, Kawi, ect.
Wannabe Racer Dad of:
#34 Logan Dusenberry
2014 AMA/ATVA 450 2X National Champion
ALL OUT RACING
2015 CanAm JB/Mt. Dew Live Wire Amateur Race Team
2014 Sponsors: Extreme-Tec ATV, Makson Incorporated, Corrosion Specialties, Rath Racing, Walsh Racecraft, SF Racing, Baldwin Motosports, Apex Powersports - New Philadelphia, Ohio, Action Extreme Sports - New Philadelphia, Ohio,