Ground mounted speed appears to be additive

[Danali]

Good morning,

Unsure if this is a focus at the moment, but it appears your flying and ground mount, when both equipped, add their ground movement bonus together.

I tested with Young Dark Brown Horse item ID 481682.

Young dark brown horse movement speed: 160% (No shoes or barding)
When I equip 10404423 Wyvern Mount from Ksavari gulch (+50 ground speed), my young horse's movement speed: 235%
When I equip 1423828 Pegasus Mount from Isle of dawn (+70 ground speed), my young horse's movement speed: 265%

Tested again with lvl 40 horse (Venerable White Horse, item ID 481707). Base movement speed (no shoes or flyer on): 205%
with Wyvern: 280%
With Pegasus: 310% zoomzoom

Please be aware the inverse does not appear to be true, in that when I equip a faster ground mount, my flyer speed is not affected (Though this might be related to the fact that flyers do not appear to be using their ground speed at all, only their air speed...both wyvern and pegasus produce 265 move speed even though they have different ground speeds on tooltip. Additionally, shoes/barding do not apply bonuses to flyers when they are on the ground).
Pegasus/wyvern base: 265
Pegasus/wyvern with any horse type equipped: still 265

Additional info, the movement speed on the char sheet does not match ground mount tooltips:
Lvl 10 Horse tooltip: +40 ground speed, actual move speed: 160%
Lvl 20 Horse toolltip: +50 ground speed, actual move speed: 175%
Lvl 30 Horse/camel tooltip: +60 ground speed, actual move speed: 190%
Lvl 40 Horse/camel tooltip: +70 ground speed, actual move speed: 205%
Shoes and barding scale similarly:
Base lvl 40 horse: 205%
With Basic Horseshoes (item ID 481729) which are +5: 212%
With Rank 2 Tack (Item ID 481745) which is +6 : 214%
With both items (total +11): 221.5%
This might just be a math/percentage thing I don't understand.

Thanks!