Tried an MT43 rear today.
With 14/50 sprockets, it's got about 3mm or clearance to the shock guard and swingarm...
Not to mention an insane amount of traction.
Not as low geared as I'd like but not an issue.
I'd tried a worn Dunlop 801 trials tyre before and was amazed by the traction but a new trials tyre is on another level.
But it's cheating. There's no effort or skill involved. Just point and shoot.
Aim it at something gnarly and it just says "Yeah, I can do that" and yawns when you get to the top. The Shinko 705's however say "Oh shit!, Not again!" and "Well fcuk me!" when you get to the top.
I prefer the 705's...