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It's very unlikely, but is there a spacer on the cranks?
I've just had a similar problem fitting a set of rotor flow cranks to my TT bike. It turns out that if you buy 2nd hand rotor cranks that started out as OEM cranks on a Cervelo then they have a 15mm spacer built into the spider that means they can't be used on a regular 68mm BB shell without replacing the spacer with a regular sized lockring.
I don't know about the Style cranks, but possibly something similar going on?
see here (post 206 onwards): https://www.lfgss.com/conversations/231362/?offset=200#comment13630826
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I will re-examine tonight, but even if this spacer were to exist, it isn't an issue at the moment.
The Stylo cranks are 2-pc - the axle is attached to the spider and DS crank arm.
Once the axle is pushed through the BB as far as it will go, the spider sits outboard of the BB seal by about 5mm. So it's not that there's a spacer stopping the axle going through any further, more the axle diameter changes almost imperceptibly.
There was no spacer, nothing that seemed to be impeding the passage of the axle through the BB.
The only 3 possibilities I can think of are: