So it broke when i wanted to make it stiffer but currently only have money for one the front one is rusty but i think it become weak do I save and buy both or only replace back one it broke on Christmas have been riding it is sways back and forward when starting and breaking it doesn't really bother me but im scared it brake more because there's wiggle coming from the back also why does my fork vibrate rapidly when starting thank you sumer is coming and want to fix everything