Bike tires for heavier people

Sounds like you need to increase the air pressure. I am ont sure what type of tire your using so I will not make a recomendation but try increasing your air pressure by 10-20psi and see if that helps. I bet it will save you a ton of energy and some cash

Good for who? Good for you or good for a shop employee?

My moutain bike I can get away with 35psi in my tires on my cross bike I am running 50-55psi in my tires and my road bike is well about 120psi.

A buddy of mine that runs the same tire on his MTN bike is at 20psi on his cross bike is at 30 psi and his road bike is 100psi

The difference is I wieght 245 he weighs 160. The more weight your putting on those tires the more air pressure you need to support that weight. Bring your bike back to the shop ask them to check your air pressure, then climb on the bike while still at the shop and have them look again. There is supposed to be a bit of defromation in the tire (mostly the rear) when you have weight on it but it should not look flat 

With all due respect to your bike shop, tires lose pressure over time and pressure can also be affected by temperature.  That's why it's standard practice for most folks to top off their tires before riding, or certainly just prior to a race.  Heavier riders generally need to run higher pressure.  I'm about 190 and use 120 lbs in mine (the max recommended pressure will be molded on the sidewall of the tire).  If you don't already have one, a floor pump with a built-in pressure gauge is a good investment.

Mark

Tires can drop pressure quickly.  I air mine up before every ride which are typically one or two days apart. 

However, to answer your original question I ride and have always ridden Gatorskins.  But again like most replies have said it isn't a tire issues its an air pressure issue.  Rear tire probably needs to be 100 to 110 psi.  Front tire 90-100.  I started my journey at 260 and if the pressure is right then tire won't appear flat.

I've seen this posted a few times. So what pressure does your tires say on the sidewall? My vittoria zaffiro's say 140 max but I keep them around 130, helps the ride feel a bit softer.

This.  I usually pump in at the top end of the manufacturer's limits.

Thanks for all of your input.

I have this fear that my tire will pop if I over-inflate. I will check out what is written on my tires and check the pressure with my tire pump I have. Thanks again!