Recommended Tyre Pressure

I've just put 28mm types on my road bike. (Yay!). There is a pressure range on the sidewalls (Max of 95lbs).
I ride on primarily well paved roads in Texas and weigh approximately 210 lbs (95kg).
What would be a good pressure to start with?
Thanks!!
I ride on primarily well paved roads in Texas and weigh approximately 210 lbs (95kg).
What would be a good pressure to start with?
Thanks!!
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I'd start at 85 rear, 70 front and see what happens, but only you can tell really
Typically I've been running ~70/77PSI, but around 11th Feb, I randomly increased them to ~77/83PSI... I then had the front tyre go from under me on Valentine's afternoon, while trying to turn right at a mini roundabout at roughly my usual speed!
Consequently, pressures got reduced back to normal and considering how sore I was that first night, I was amazed to feel up to riding again the next day... While taking 90 degree bends far more cautiously than I was!
2020 Voodoo Marasa
2017 Cube Attain GTC Pro Disc 2016
2016 Voodoo Wazoo
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Im not an expert on this by any stretch, but doesn't recent research indicate that pumping tyres rock hard causes bouncing on imperfect road surfaces which actually increases rolling resistance?
I was always a big fan of inflating to max 120psi and I never knew any different but I started trying 75 front 85 rear and the terrible Scottish roads suddenly became a LOT more comfortable . I use 25mm tyres. It didn't affect my speed according to strava/garmin
This^
Tyre Width=20: = (0.33 * Rider Weight in lbs) + 63.33
Tyre Width=23: = (0.33 * Rider Weight in lbs) + 53.33
Tyre Width=25: = (0.33 * Rider Weight in lbs) + 43.33
Tyre Width=28: = (0.33 * Rider Weight in lbs) + 33.33
Tyre Width=32: = (0.17 * Rider Weight in lbs) + 41.67
Front pressure 0.9 x rear pressure.
I'd much rather they stated "fully kitted out rider weight," which could easily be a few kilos more. And don't forget to include your water bottle, if applicable.;)
2020 Voodoo Marasa
2017 Cube Attain GTC Pro Disc 2016
2016 Voodoo Wazoo
This definitely does not work for me! I'd be riding my 28s @ 103 and 92. Youser!!!!
Using that I should be running my 25s at 90psi rear and 81psi front which isn't far off what I actually use, I guess it works well up to a point
I have also heard this but I can't say I've ever experienced it. When I let my tyres down to a lower pressure I can feel the increased drag but I don't think the level of cushioning offsets the increased contact patch.
My theory is the tyre acts like a spring damper combination. If you change the tyre pressure you change the natural frequency of it. If you are unfortunate to have a combined mass of rider and bike that sits you in the natural frequency of the road imperfections, the bike will vibrate. My combined bike+me is ~80kg and I don't think it seems to affect me as much.
Again, this is just me from experience, I have no valid data to back any of this up.
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You're over thinking this. If you run a solid wheel (which is basically what you have with a tyre pumped up to max) over a rough surface, such as a road, it will have to ride up and down every imperfection, which a) will naturally slow it down, and b) create a harsh ride for the vehicle that it is attached to. The whole point of using a pneumatic tyre is to smooth out the imperfections found on the usual road surface. The only place where where a rock hard wheel is faster is on the smooth wooden floor of a velodrome, and no road is like that.
You might think that a hard tyre is "faster" due to all the vibration that you feel, but it really isn't. That vibration is slowing you down.
Just watched the above -- Good link.
He also provides a link to an spreadsheet tire pressure calculator that handles variables including rider/bike weight, tire width and road surface. Seems like a better place to start.
I'm around that sort of weight, I have 33mm tyres which I run around the 60psi mark.
bare in mind most pumps are not that accurate.
But a lot will depend on you, some folks like the zing of higher pressures and other don't mind the vagueness of much lower it really is try and see.
According to their system I should put 58 psi in the front and 63 in the rear on my 28s, which seems a bit low, and is quite a bit lower than what I'm running them at atm. Si runs his about there, and he is only 2 kg heavier than me, so I guess it must be ok?
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