Couched Lance

Lances.

They do thr+3 imp damage.

A stout knight with a ST 12 will do 1d+2 imp.

That's just him stabbing with it.  This is all you can do with a heavy spear without stirrups.

If he has stirrups and can couch the lance he can then charge with his ST 24, Move 7 Warhorse he can get trucking at a move of 8.

Figuring out the damage for this is (Horse's ST)*(Move Last Turn)/100.  This is 24*8/100 or 1.92 dice.

Or, 2d.  Add the +3 as well for 3d-1 imp.

That looks better!

1d+2 will average a hit of 5 and will deal 10 to an unarmored opponent.

3d-1 will average a hit of 9 and will deal 18.

A Napoleonic or Uhlan lancer use a lighter, faster horse with ST 22 and Move 8.  22*9/100 or 1.98 or...  The same 3d-1 imp.

That assumes the horse is in no-encumbrance state.

The example armor for a 15th century German Ritter is wearing 46.7 lb of armor and the horse has 54 lb of barding.  Plus the 150 lb Ritter, 6 lb. lance and 30 lb. saddle.  That's a total of 286.7 lb. of gear.

A heavy warhorse has a basic lift of 115.  286.7 lb. of gear is 2.49x the basic lift putting us in medium encumbrance and that changes the move from 7 to 4.

Charging speed of 5 results in a straight 2d imp.  That's an average hit of 7 and 14 dealt.  Better than just poking at them, but...

A lancer is not carrying near the mass of armor!  The Uhlan lancer is lugging a lot of gear nonetheless.

273.6 lb of rider and gear on his horse's basic lift of 97 lb.; 2.82x or medium encumbrance which makes the horse's move 4.  Charging speed of 5 gives 2d-1 imp.  That's an average hit of 6 for 12 past the armor.