Drastic change in tire pressure during break in? - MVAgusta.net
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post #1 of 17 (permalink) Old 09-10-2006, 10:01 PM Thread Starter
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Drastic change in tire pressure during break in?

I got my bike about three weeks ago and it handled like a dream. About four or five days ago, I noticed it felt like it was turning in two piece -front and then back instead of one piece. And, the front tire was harder to turn at stand still. Also, I noticed wear up to the edges (usually for the level I'm riding at). Well, I checked my tire pressures and it was like 26/32! I normally like it a bit higher at 34/36.

At first I thought Pro Italia lower the pressure to help me get my feet on the ground but after bring it to 34/36, it handled just like when I bought it.

So the possibilites are:

1) Someone lowered my tire pressure; or
2) I'm loosing are (but I checked for nails and damage - nothing)

Is it normal for a new tire to loose air in three weeks and 300 miles?
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post #2 of 17 (permalink) Old 09-10-2006, 10:16 PM
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What tires are you running?

it's definetly not normal for tires to lose that much pressure so quick.
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post #3 of 17 (permalink) Old 09-10-2006, 11:01 PM
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Was the tyre temperature checked and tested when the tyres were cold? Tyres temperature rises quickly with only about 1km of slow riding.

Slow is smooth and smooth is fast!!
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post #4 of 17 (permalink) Old 09-10-2006, 11:53 PM Thread Starter
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Stock tires were the Pirellis Supercorsa Pro.

I was thinking about tire pressures. I think Pro Italia may have set up the bike in the morning and was probably around 70 degrees. When I adjusted the pressure it was probably around 80 degrees. I thought that temperature may have been a factor but I didn't think it would be that great.

So, is it better to check tire pressure when it's ambient is cold? I assume as it heats up, the pressure will increase, right?
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post #5 of 17 (permalink) Old 09-11-2006, 12:18 AM
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Changes in atmospheric temperature can make a drastic difference in tire pressure, I check mine every second time im on the bike just to be safe.

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post #6 of 17 (permalink) Old 09-11-2006, 03:18 AM
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Temperature is probabaly the culprit here, It seems to make massive differences to these Supercorsa's, I went out on mine the other day and turned around and went home because it felt like I had a puncture, turned out the front had dropped from 33 to 30psi, I don't think these supercorsa's have a lot of feel either, they certainly grip well, but somehow they just don't have the feel like the 3 sets of Michelin Powers I had on my last 1000 did.
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post #7 of 17 (permalink) Old 09-11-2006, 04:28 AM
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I always check tyre pressure before I go for a ride, ie when the tyres are completely cold.

Its important to us an accurate tyre pressure guage. I use a portable el-cheapo pump to pump up the tyres when required. The guages at the filling station most likely been dropped and abused and out of calibration.

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post #8 of 17 (permalink) Old 09-11-2006, 04:54 AM
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i checked my tire pressure at 400 miles for the first time.... after 3 days of ownership
they were
22/34
i am NOT kidding
i was SURE that there was a leak in the front tire
i filled them to 34/36 and rode for 25 miles
got to the dealer and they were the same and they've BEEN the same for 2 more weeks.... almost 1,200 miles on the bike now
HOW did this happen?
who knows...... did they NOT PDI the bike properly?
seems UNlikely..... but, there is little other explanation

i check my tire pressure EVERYTIME i ride



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post #9 of 17 (permalink) Old 09-11-2006, 03:52 PM
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Quote:
Originally Posted by spalding12
i checked my tire pressure at 400 miles for the first time....
i check my tire pressure EVERYTIME i ride
"seems" to contridict each other
just wondering.....calm down
take a deep breath
not trying to imply I do it everytime
I do it once a week just because I'm lazy
don't mind me......doesn't matter.......just being picky....I ask too many questions
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post #10 of 17 (permalink) Old 09-11-2006, 04:58 PM Thread Starter
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Quote:
Originally Posted by spalding12
i checked my tire pressure at 400 miles for the first time.... after 3 days of ownership
they were
22/34
i am NOT kidding
i was SURE that there was a leak in the front tire
i filled them to 34/36 and rode for 25 miles
got to the dealer and they were the same and they've BEEN the same for 2 more weeks.... almost 1,200 miles on the bike now
HOW did this happen?
who knows...... did they NOT PDI the bike properly?
seems UNlikely..... but, there is little other explanation

i check my tire pressure EVERYTIME i ride
That was pretty much around the psi I was at. I'll check it on Wednesday afternoon to see how it's changed.
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