Originally Posted by
WhyFi
As noted, the ~73psi limit is an ETRTO guideline; Zipp and Hunt aren't the odd ones out, these are standards that many wheel and tire manufacturers are building to. Just something to be aware of if you stray from Giant's own tires in the future.
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I'm wondering how the actual ETRTO reads. I have a feeling maybe that max psi could be dependent (like maybe it should be) on the inside rim width. Enve, similar to Giant with its 19mm wheels, departs from the 73psi, but only for its 21mm width wheels (the 45/65 models).
