The invention on the good saddle tree also allowed advancement of your real stirrup as it is known now.[15] Without having a stable tree, the rider's weight within the stirrups generates abnormal force points and will make the horse's again sore. Thermography experiments on "treeless" and versatile tree saddle designs https://collinkwhrb.bmswiki.com/5457139/saddle_pads_things_to_know_before_you_buy