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Hmm, SPC happens when the bolt backs out enough over time that the bolt backs out and spins. Here’s a solution that doesn’t void your warranty or cost tons of money
With every oil change tq the crank bolt to spec.
Bingo! Problems solved just tighten the bolt my friends it’s honestly that easy
If you don’t wanna do that get the single large key crank hub precision dynamic offers. The 4 keyed if not drilled properly will fail. Precision has fixed quite a few already fixed crank hubs with the 4 keys and utilized their own with no failures
The problem with the 4 keyed failing is improper installation. If the drill isn’t perfect 100% straight your basically gonna fail and it’s only a matter of time.
Precision dynamics will mushroom inside the crank case allowing them to not have a perfectly drilled hole but will fit perfectly while other companies your relying on installation perfection and that’s not something to put your hopes on
Last edited by M2_MEDUSA; 03-26-2021 at 05:41 PM..
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