The wheel can go only as far as the screws allow it to. It's definitely safe from the moment the QR-nut doesn't come outside the dropouts. (don't know if that's clear?)
@WimVDD started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
The wheel can go only as far as the screws allow it to. It's definitely safe from the moment the QR-nut doesn't come outside the dropouts. (don't know if that's clear?)