10x weaker than the usual paper clip. Practically like thin copper wire. Most wheels I see are drilled for Schrader and include an insert for presta valves, so the wheel strength argument doesn’t delay, and I’ve never ever experienced a difficulty using a Schrader valve which can be more strong https://sites2000.com/story9438372/how-much-you-need-to-expect-you-ll-pay-for-a-good-presta-addons