Bumpy issues???
Never seen anyone with a bumper issue on my local track and have been running the original XB4 up until this week... Yes I swapped for the NEW XB4! Although it looks similar there are many very clever developments, it has gone to the next level again so smooth to drive and carries so much corner speed than the previous version
But bumper issues not heard of them, if your compressing the suspension that much then you probably need to run stiffer
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