Erm guys, does anyone of you know what is a "steerable " tag
axle and "non-steered" tag axle? FYI, the Volvo B10MA that SBST
used to have also have a tag axle, but is Steerable. SMRT's O.405G's tag
axle (or B axle, the middle axle) is non-steered, meaning it cant
be steered whatsoever . The LO3x , VO3x and VSO and B9TL also have
non-steerable tag axle. You guys really sure that the LO3x, VO3x
the tag axle is steerable?

The axle that's pointed at is the tag axle, the one behind it is
the drive axle. Are you really sure that this axle(tag axle) can be
steered? 
From what i believe, in order for the tag axle to be steerable, it
must be behind the drive axle, otherwise the vehicle might
'crab-walk". That explains why most of the steerable tag axles
found on coaches and city buses are behind the drive axle, not
infront of the
drive axle.