Hello fellow riders I have an issue with my tire and thought you could help me.

Every time I get a flat and replace my innertube my tire sits lower in the rim in one section. It looks like the tire is sucked in deeper in one section of the tire.

Last time this happened the guy at the bike shop said I can rub soap along the tire to pop this section out. But I don't quite know how to do this.

Any help or suggestions would be much appreciated so I can save my self a trip to the shop.

Thanks,

Matt