MrWasabi

I know it's not an exact but just looking for where others may be. I'm running GK Slicks in 35c w/tubes on my Fuji Traverse. My riding is about 80/20 paved/hard pack and I weigh 185. Panaracer has the max PSI at 75 w/tubes. I'm mostly worried about going too low but want to still keep the ride on the cushy side. Most of the guides I'm seeing out there are for tubeless so should I just bump up the PSI about 10-15% from there?

Thanks for any input.

hokiefyd 

What is your concern with low pressure? Hitting a rolling resistance wall...or pinch flatting? If the latter, I think you can go pretty low at your weight. I'm about 240 pounds and I ride 38mm tires (with tubes) at about 2-3 bar in the front (30-45 psi) and 3-4 bar in the rear (45-60 psi). I'll set it at the lower range if I'm on hard pack for more comfort and at the higher range if I'll be riding pavement and want to feel faster (note: "feel" faster; I don't actually "go" faster!). Even at 2 bar front and 3 bar rear, and at 240 pounds, I've never pinch flatted. If your 35mm tires are pretty true to size (and Panaracer tires generally are), then I think you could very safely run similar pressures to me for comfort.

MrWasabi

Thanks for the excellent input. My main concern would be the pinch flats. It sounds like I could roll for a good mix of riding with lesser pressures than I thought at my weight.

scottfsmith

Use the SRAM calculator for one opinion: https://axs.sram.com/guides/tire/pressure

Looks like they recommend 55 front 58 rear or thereabouts for road, 50 for gravel. I run less than that myself (40s, I am 160lbs) so I agree with hokie that you could try lower.

Pinch flats depend a lot on the kinds of roads, some roads are bad and the risk is high other places it is of minimal concern.

Iride01 

If you have a pinch flat on what ever your normal riding conditions are, then you know you need to run a higher pressure. Or, just wait for the next pinch flat. Or, go tubeless.

I'll probably never have a pinch flat myself, but I do lower my tire pressures and raise them for the type surface I'm going to be on. Chip seal roads get lower pressures, smooth asphalt higher pressure.

Sy Reene

This TIRE PRESSURE CALCULATOR puts you at recommended approx 50F/55R fwiw. Sure, go ahead and add 5psi to these if you want a little more pinch flat protection.

davidad

Ideal Tire Pressure - Google Sheets