The kart had the original golf cart tires which were basically tread less. I did go with wheel barrow rims and tires because they cut through the weeds rather than plowing them over and added a little height as well. My son crashed into a tree and bent the front ‘axle’ along with a crack in the frame just behind the axle and snapped a steering wheel arm. I temporarily half-ass fix the issue and lasted for 3 years until he out grew it. Being retired and have some free time I plan to do a totally modified restoration fiberglass, roll bar,lights, tires, hub caps,electric squirt guns etc to a spider man buggy theme. Back to springer spindles. Do they have the same vertical angle as regular spindles and how long should I make them? I’m not using them as a shock absorber per-say rather as something to cut down on vibration