OK so chrisking for stock is the best...( i need maximal safety)...but there is 6 versions...Classic, ISODisc, Universal, SingleSpeed, SingleSpeedDisc, Tandem....so WHICH ONE ??? i don't need disc brake mounts
i think zoo (new one). It's stronger than echo and BB high 55mm is better than 10mm. And in my oppinion zoo is more flexible so you can jump higher, but i haven't tested it !