asalvo TRIO GENIUS 16850 Manual De Instrucciones página 22

2a.Lift the handle up as pic 2a
2b.when the stroller is opened as pic 2b, you should hear "click" sounds
on both side of the stroller, please examine if the stroller is locked in
safety position before you use it.
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3a.To assemble the rear wheels: Take one side of rear wheels, Insert the
rear axle into the plastic hole as picture 3a, until it is locked, install the
other side of the rear wheel in the same way.
3b.To disassemble the rear wheels: Pull the rear wheel express iron as
arrow 1, remove the rear wheel in the direction of arrow 2 then finish the
disassemble
OPEN THE STROLLER
ATTENTION! Check if the mechanisms are well engaged.
ASSEMBLE/DISASSEMBLE REAR WHEELS