Tyre pressure for climbing
gdcfc1
Posts: 127
Have a longish climb to do this weekend. It's about 11.5km at 6% average with some steep bits and couple of hairpins.
looking into the +1
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Never heard anything like it.....0
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90 psi if the hairpins are both left and right handers, if they're right handers then you'll want slightly more pressure on the right hand side of the tyre, if left handers vice versa.0
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Give up cycling. Please. Just give it up.0
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90 psi if the hairpins are both left and right handers, if they're right handers then you'll want slightly more pressure on the right hand side of the tyre, if left handers vice versa.
What about on the straight bits? How much pressure in the middle part of the tyre?looking into the +10 -
Well, you can't have everything.0
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it might be quicker to just run up the hill0
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but if the tyres are to soft won't that make the running difficult pulling the bike along as well?it might be quicker to just run up the hilllooking into the +10 -
Fill with helium to the max stated pressure on your tyre.0
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but if the tyres are to soft won't that make the running difficult pulling the bike along as well?it might be quicker to just run up the hill
not if you carry it on your back0 -
Once you have found the correct tyre pressure you must then adjust it as you climb due to the associated drop in atmospheric pressure with increased altitude.
The link below shows a table you can use this in order to get the optimal tyre pressure relative to the atmospheric pressure as you climb. This is best achieved by letting some air out of your tyres every few hundred metres and monitoring your tyre pressure with a gauge. Please ensure that you save the released air as you will need to top the tyres back up bit by bit on the descent.
http://www.engineeringtoolbox.com/air-altitude-pressure-d_462.html0 -
+10% for for efficient climbing.
-10% for more grip descending.The above may be fact, or fiction, I may be serious, I may be jesting.
I am not sure. You have no chance.Veronese68 wrote:PB is the most sensible person on here.0 -
You could try hydrogen instead, as it's a lot less dense than helium. The only problem is losing traction on the inside of tight hairpins, as your bike will have the tendency to drift into the air due to the buoyancy. For this reason you should UNDER NO CIRCUMSTANCES use 25mm or larger tyres.Fill with helium to the max stated pressure on your tyre.
Oh, and you have to watch out for them exploding in a ball of flames if you brake too hard on the descent.0 -
Instead of trying to get hold of pressurised helium or hydrogen (what are you lot like! :roll: ) you could under-inflate the tyres and then heat them up with a heat gun until they're at a higher pressure. You get your low-density gas with the added advantage of being able to adjust the pressure without all that exhausting faffing around with a pump.
Don't forget to take a battery and heat gun up the hill with you! Rookie mistake, that.- - - - - - - - - -
On Strava.{/url}0
