So, what’s the issue when the rear wheel doesn’t stay locked when you pick up the bike, even though the seat post is fully retracted?
The plastic disc that the rear shock rubber is mounted on and which the rear triangle latch engages with may have rotated so it doesn't engage any more.
@Brommers started
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So, what’s the issue when the rear wheel doesn’t stay locked when you pick up the bike, even though the seat post is fully retracted?