HPR customer appreciation lapping day

[Bueller]

Forecast is down to 36 for a high Sat. doesn't look good for the bike day, car guys are looking @ 47

[madvlad]

Brrrrr!

[The GECCO]

its in Roadracing World magazine number -1 - 2013,it was the same spot Zach Kinzler hit next day - they didnt said how old it was

That's it. That article was rather misleading regarding details about the airfence, but Aaron is fine.

[Grim2.0]

Wonder how the DRZ would do?

[madvlad]

Wonder how the DRZ would do?

Definitely bring tire warmers if you do, even then grip will be a problem

[WolFeYeZ]

Wtf is this grim 2.0 bullshit?

[madvlad]

Wtf is this grim 2.0 bullshit?

Its grim's updated firmware for a new and improved ice cream sandwich

[Radek]

That's it. That article was rather misleading regarding details about the airfence, but Aaron is fine.

yeah,when i rode Sears point ,there was no airfence in last turn that has wall so they didnt let us in that turn,I never rode Pikes peak ,so I dont know whats the problem,sure the fences from someones borrowed hay are better then nothing

[Grim2.0]

Its grim's updated firmware for a new and improved ice cream sandwich

What he said

[Bueller]

Definitely bring tire warmers if you do, even then grip will be a problem

Tire warmers won't do shit at these pavement temps. by the time you roll out to the track the tires will be cold.

[madvlad]

well then nvm on the warmers lol

[Scer]

The real problem is friction. Although asphalt/concrete has a higher friction coefficent when colder (not icy), rubber is the extreme opposite. Rubber acts more like plastic the colder it gets. The softer the compound the more pronounced it becomes as well. Thus why some street tires are better (for durability) on cold days than some race tires. Like bueller says, warmers won't do too much for you after the first lap. Talk to your tire vendor to help with your cold riding needs.

Appreciate on appreciatas

[Grim2.0]

The real problem is friction. Although asphalt/concrete has a higher friction coefficent when colder (not icy), rubber is the extreme opposite. Rubber acts more like plastic the colder it gets. The softer the compound the more pronounced it becomes as well. Thus why some street tires are better (for durability) on cold days than some race tires. Like bueller says, warmers won't do too much for you after the first lap. Talk to your tire vendor to help with your cold riding needs.

Appreciate on appreciatas

How do you think the PR3s would do opposed to the Bridgestone battle axes at 35 degrees?

[Tiutis]

The real problem is friction. Although asphalt/concrete has a higher friction coefficent when colder (not icy), rubber is the extreme opposite. Rubber acts more like plastic the colder it gets. The softer the compound the more pronounced it becomes as well. Thus why some street tires are better (for durability) on cold days than some race tires. Like bueller says, warmers won't do too much for you after the first lap. Talk to your tire vendor to help with your cold riding needs.

Appreciate on appreciatas

The softer the more pronounced it gets?
I'm thinking about car tires but it should be the same principal. Why are snow tires made of softer compound? Those grip better at near freezing than harder compound all season tires?

[Bueller]

Race tires come in around 175*F IIRC. That is where they have the best grip and that is where they are soft. Cold race tires are like rocks when they are cold.

This is one of the big reasons race takeoffs don't make good street tires if you don't know what to expect out of them. They really never come up to temp on normal street riding and don't have good grip.

[Tiutis]

Race tires come in around 175*F IIRC. That is where they have the best grip and that is where they are soft. Cold race tires are like rocks when they are cold.

This is one of the big reasons race takeoffs don't make good street tires if you don't know what to expect out of them. They really never come up to temp on normal street riding and don't have good grip.

Makes sense now.

Did anyone go to HPR today?

[Bueller]

After seeing the weather I am wishing I would have now

[Grim2.0]

Decided to take the kid to the museum instead i got my dosage of going fast in today chasing her around.

[Mother Goose]

What makes you say that?

Cause I'm racing this year! Duh!

[Tiutis]

Almost 50 tomorrow! I'm taking my car tomorrow to have some fun. Anyone else coming tomorrow??

[Scer]

How do you think the PR3s would do opposed to the Bridgestone battle axes at 35 degrees?

Unfortunately, I don't have much experience with those specific models. You might want to ask the vendors (or dealers) for those tires. Sorry!

Race tires come in around 175*F IIRC. That is where they have the best grip and that is where they are soft. Cold race tires are like rocks when they are cold.

This is one of the big reasons race takeoffs don't make good street tires if you don't know what to expect out of them. They really never come up to temp on normal street riding and don't have good grip.

Right. Plus snow tires aren't designed (mostly) to be ran on the asphalt. They were made to run on snow. So the softer rubber allows the tires to gain traction by mechanical grip and not so much by surface friction. Take those same puppies around some laps on an asphalt track and watch them disappear in front of your eyes.

grip on grippas