Tyre Pressures on Rode Bike
Hi all..
Over the past two weeks I have been pumping my tyres up to 120 front an back.. Two Gawler Wheelers rides I have noticed with cross winds I seem to be getting knocked around a bit more than previous rides when I use to have 110 pressure in my tyres. Would the extra pressure be making me lighter on the road causing me to be effected by cross winds more than what I was use to ?
Replies to This Discussion
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Permalink Reply by Rob (Chewbacca) on -
Definitely you would feel the bumps more and not so comfortable on some of those roads up there....
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Permalink Reply by Patrick O'Kane on -
How can putting a couple of CCs of air in you tyres make you lighter?
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Permalink Reply by Matt "Boz" on -
Helium?
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Permalink Reply by Gillian on
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Smaller tyre footprint is all I can think of. Maybe like lowering 4WD tyre pressure off road to get bigger footprint and better traction, esp sand? Comment made with head and lungs full of gunge and therefore I reserve my right to delete upon recovery ;-)
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Permalink Reply by Lee Bakes on -
I agree with Gillian. Less tyre contact patch. Less give in the sidewalls of the tyres too I would think due to the increased pressure.
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Permalink Reply by Mike Brisco on -
Agreed - plausible explanation.
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Permalink Reply by Matt Brennan on -
if it does make you lighter Im cranking mine to 150 tonight!!
Perhaps the higher pressure made you feel a few extra bumps on the road Terry? Had you done the same GW route with lower tyre pressures?
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Permalink Reply by terry heney on -
Hey Matt...
Yer have done the same route before and no wayyyy did I feel as uncomfortable with 110 in tyres with cross winds compared to 120...Bumps I know I do feel more with 120...but I am sure I roll easier :)
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Permalink Reply by john mills on
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Terry, you get knocked around more the less your mass. Maybe you are losing a bit of weight with all your exercise. I don't think the harder tyres would be a factor, unless maybe you are bouncing off the ground as you hit the bumps!
There was no real gustiness as such on Saturday, but maybe you rode through a thermal or two. That would affect any rider, as it would alter the required 'lean angle' to balance the crosswind. If the thermal hits you suddenly, as they do, your reaction time to adjust means you become unbalanced for a moment. I have been capsized in my little sailing dinghies when thermals hit. But the sail area is a bit bigger than your flat spokes!
Like I said, the best way to combat gustiness is to wear a little lead belt, like the divers do. I think its going to get gusty up past Williamstown this weekend. I recomend you take on at least 5 or 6 extra kilograms mate! lol.
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Permalink Reply by gordon on -
Sidewall flex is your suspension on roadie. Tyre pressure affects compression/ rebound.
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Permalink Reply by terry heney on
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I weigh 75k and really haven't lost much weight since starting up bike riding...I dunno maybe its just me being paranoid about cross winds..Just seems strange since having tyres at 120 and now feeling cross winds more than I was use to...must be all in my head.. lmao.. I am going to go back to 110 over the next two weeks and see if this is all in my head :)
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Permalink Reply by Matt Brennan on
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hmmmmmm you might be a bit high pressure wise.
I'm about 10 apple pies over 75kgs and I run 110 front and 120 back.
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