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Buell Forum » XBoard » Buell XBoard Archives » Archive through October 31, 2004 » Tires/Pavement Temperatures.??? « Previous Next »

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Hogs
Posted on Monday, October 25, 2004 - 10:05 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Well what I`m trying to get at here is: Lets say air temp> = 12 degs. cels. during the day... But early AM: and evenings air temp>= 5 degs. Soooo
During the day riding the air temps. being higher(warmer) and other times being colder which times wd. the tires stick better all other things being equall??
daytime or other? Seems to me I heard that eveing cooler conditions the tires wd. stick better so in that case Early AM: or Evenings wd. be better?? Seems on top Fuel etc. drag cars they like the cooler temps . For traction ...What ya all think? Thanks Chris
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Ingemar
Posted on Monday, October 25, 2004 - 10:17 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Never thought about it. Always thought the higher the better, 'cos it means the rubber gets softer, no? Interesting though ...
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Glitch
Posted on Monday, October 25, 2004 - 10:26 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I like hot roads and hot tires.
I have more confidence on the same road when it's warm to hot out then I do when it's chilly or cold out.
I don't know about dragsters and track condition, may have to do with the amount of rubber coating the track.
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Henrik
Posted on Monday, October 25, 2004 - 10:50 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Dragsters may like cooler temps because of the higher air density. More oxygen for the same volume of air inhaled = more power.

Cooler temperatures ought to yield lesser traction all things being equal. You could decrease your tire pressure to get the tires to heat up a bit more. But if you stay with the same tire pressure, my guess is less heat in the tires = less traction.

Henrik
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Hogs
Posted on Monday, October 25, 2004 - 10:50 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Hmmm Tires are hotter ...yes... but the pavement being cooler less slippery more grip ahhh ????/ more Than hot pavement more warmer more slippery conditions..ahhh ???/ hot (tires) grips cold (pavement) ......hot (tires) grips hot (pavement)???

sort of speaking... Am I losing it??? :-)
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Hogs
Posted on Monday, October 25, 2004 - 10:57 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Thanks Henrik and all... Yes I should have said tire performance and not engine performance I know what ya mean there...

Interesting I`m still out on this though... The reason I`m asking those are the conditions I`m into now and only going to get cooler as time comes by.. Going for a ride now with the old lady on her xb hahah shes riding her own ..I am glad I read this ..Look like at first shes was going to ride me .. Well thats not bad either oh well :-) cya maybe put on 200 or so klms. will check back later :-)
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Fullpower
Posted on Monday, October 25, 2004 - 02:11 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

i have been riding around all weekend, 34 degrees and raining in the morning. up to 42 degrees Fahrenheit in late afternoon, still wet roads. Metzeler Z6 tires grip pretty good when cold and wet, highly recommended.
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Blake
Posted on Monday, October 25, 2004 - 02:40 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

On the street warmer is better. On the track, too warm will hurt traction as the tires get so darn hot from the workout. Watch a NASCAR or F1 race. When the cloud cover appears, the cars can almost always cut their laps times (increase speed) significantly.

But on the street our tires rarely get enough of a workout to get them hot.

Asphalt doesn't lose grip with increased temperature that I know. A road with tar as a binder certainly would though. Tar is very slippery on a hot Texas road. Tar sucks! Motorcyclists unite! Ban the use of tar on roads! Loose gravel sucks too!

Thus sayeth the grouchy old Buell rider.
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Glitch
Posted on Monday, October 25, 2004 - 02:45 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Tar snakes can kill.

I didn't know that about a track getting too hot.
Makes sense though.
Do yo know what the temp range for track is best?
Not air temp, but the track itself.
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Wyckedflesh
Posted on Monday, October 25, 2004 - 04:03 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Hogs, one aspect you aren't taking into comparison for your temp analysis is the effect of the humidity on the roads through out the day. The cooler morning temps can easily keep the roadway dusted with morning dew that will burn off as the day warms. That light dusting of dew can affect your traction. If it were not for that dew the temp range is close enough for street tires you really wouldn't notice a difference unless you were riding like Blake mentioned on a track, OR riding as hard and aggressive on the street as you would on a track.

Glitch I think it depends on the compound used for the track itself. Not all tracks use the same blends and some blends are made for high heat,very sunny areas and others are designed with the medium and low temps they reside in. Like the material used for Willowsprings Raceway will be different then that used for Pocono.
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Ingemar
Posted on Monday, October 25, 2004 - 04:26 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

When the cloud cover appears.

Doesn't that depend on the climate they are racing in? In some countries it can't get hot enough even with the sun out all day.

Very interesting. I didn't know it could get too hot for tires.
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Kowpow225
Posted on Tuesday, October 26, 2004 - 05:41 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

'Nuff said about the tar snakes. The only thing as awful are the huge planks of steel the highway dept. uses to cover areas of construction in the road. A faceplant waiting to happen.
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Dasbuell
Posted on Wednesday, October 27, 2004 - 11:34 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Some of them tar snakes in Kansas are like little patches of ice... nothing like having the front, rear, or both suddenly slip about an inch in the middle of a turn. I think they get slicker when they are hot. 100+ degree day and Kansas tar snakes can make a ride instantly exciting for about half a second!

Yes... there are actually a few twisties in Kansas1
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