Tyre Losing Air.

[Helpmytrap]

If its a minor dent use a shift spanner instead with some cloth wrapped around it and gently wedge it back to shape. Start from the outside and move towards the middle of the dent. Then move to the other side and repeat.

 

Johan will chime in any moment now with the correct procedure

I suppose a shifting spanner makes more sense as you'll have more control while bending it since you have to keep a pliers compressed while trying to bend it. "Luckily" the dent was only on the one side.