The Baby Jogger Summit X3 has quick release wheels - front and rear. Removing the wheels makes it more compact when folded for storage and transportation. It can also help reduce the transfer of dirt from the wheels to the inside of your car.
Quick Release Front Wheel
The front fork and wheel assembly is a single unit which can be removed with ease and simplicity from the main frame by a quick release system, the metal release lever is concealed below the footwell
press the release lever
remove wheel downwards
to mount the front wheel simply apply the front fork to the pivot and it automatically clicks on
Quick Release Rear Wheels
On the rear axle is a release button for the wheel axle.
press the release button and pull out the wheel
to mount the wheel simply re-insert the axle and push until you hear it 'click' into place, then give the wheel a tug - just to double check it is securely locked in