oh man fuck aluminum.. my friend jordan and i hit the most perfect, mellow 8 kink in the world last year and werent aware of the effects of aluminum... he went first and went head over heels at the first kink. he was like DUDE you CANT slide this shit. but i thought he was just being a pussy and told him so and dropped. i skidded thru 3 kinks before nose divinginto the concrete stairs...shit is absolutely impossible to slide with edges. when i rip the edges out of my beat up tm's i think im gonna go back..i think that will work