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**BigMacca** · 03 Sep 08, 11:23 AM

Hello all,

Sorry if this has been brought up before, I've searched but not found anything.

I'm just wondering whether people allow of ambient temperature changes when setting tyre pressures.

For example, I set my tyre pressures before every ride. So this morning when I set off for work they were at 33f / 37.5r (cold) but it was only about 8 degrees.

When I ride home this afternoon, the temperature is more likely to be something like 18 - 20 degrees and from experience my cold tyre pressures will now be more like 34.5f / 39r.

So should I be setting them a bit lower in the morning to account for the change in ambient temp (anyone know how to calculate the effect temp increase has on pressure?), or just set them and not worry about it?

03 Sep 08, 11:23 AM	#1 (permalink)
BigMacca Newbie Join Date: Mar 2008 Posts: 14 BigMacca's Gallery Bike: 2005 Multistrada S	Not your normal Tyre Pressure Question Hello all, Sorry if this has been brought up before, I've searched but not found anything. I'm just wondering whether people allow of ambient temperature changes when setting tyre pressures. For example, I set my tyre pressures before every ride. So this morning when I set off for work they were at 33f / 37.5r (cold) but it was only about 8 degrees. When I ride home this afternoon, the temperature is more likely to be something like 18 - 20 degrees and from experience my cold tyre pressures will now be more like 34.5f / 39r. So should I be setting them a bit lower in the morning to account for the change in ambient temp (anyone know how to calculate the effect temp increase has on pressure?), or just set them and not worry about it?