When my buddy is riding behind me he says my wheel is not spinning true, its a tiny bit wobbly. I can feel it sometimes, and im kinda worried that it might cause an accident at higher speeds. Could this be an alignment issue, or do I need a new wheel ? Also, my front tire is a bit sun damaged (cracking) and I dont want a blowout on the highway, and the back tires feels a bit spongy when im riding. Where is a good place to have these 3 things looked at ? Could the bent rim be causing headshake when I take my hands off the bars when going slower ?