Does under inflated tyres make a difference...

[Shortmember]

I just pump my tyres up until the handpump overheats or I can't push any more air in- whichever comes first.I'll put up with a boneshaking ride on rock hard tyres rather than the pedalling-through-treacle feeling that comes with underinflation.

 

[HLaB]

Depend on the surface, on a perfectly smooth surface it makes a massive difference IMO but less so on a rough one; however, if your tyres are too low pressure it doesn't really matter as to the surface tyres are just too sluggish. FWIW I run my tyres at 105psi rear 95psi front and they often fall by 10-20psi and I don't notice much change but if they fall further I do.

 

[steve52]

mmm did the op really have to ask?.i noticed the differnce when aged about 7

 

[byegad]

Plus, you run the danger of "Pinch Flat", when the tube gets trapped between the rim and the road in an unproductive way. Manufacturers specifications always work best, it seems.

Exactly for the minimum pressure, I'm talking about a small %age reduction in pressure only.