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Buell Forum » 1125R Superbike Board » Archives 001 » Archive through November 02, 2009 » Tyre Tread Markers « Previous Next »

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Mr_christopher
Posted on Saturday, October 31, 2009 - 01:59 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

First of all my spell checker is working - tyre is Australian for tire ; )

Got a track day at Phillip Island coming up and I was giving the bike a once over when I noticed the front tyre has hit the tread markers. Now I'm wondering if I should replace them before the track day (on Wednesday) or will they be safe enough to get me through.

I have the original stock tyres and I've done 7,000 kms How many kms (or miles) do you get once you hit the tread marker?

Also I don't know if it's a good idea to hit a track on new tyres, maybe it's better to finish off the fronts on the track and buy a new one in a week?

Advice?
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Kevin_stevens
Posted on Saturday, October 31, 2009 - 02:25 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Many track organizers specify 90% or newer tires. At the tread markers I'd recommend contacting them ahead of time, because very little sucks more than showing up to a track day and not passing tech.

I would definitely want new tires rather than old, just because of the profile flatspotting that typically happens. And personally I'd go to considerable effort/expense to accomplish that, especially if I'd made a significant investment in a trackday.

New tires aren't a problem at the track, it's very common and they get scrubbed in within a couple of laps.

KeS

(Message edited by kevin_stevens on October 31, 2009)
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Tasmaniac
Posted on Saturday, October 31, 2009 - 03:32 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

G'day Chris

A Pirelli corsa thats down to the tread markers wont get you through two sessions on Philip Island.

Michelin Pilot Power 2CT tyres are the grip/mileage tyres i've found i've got 30,000k's on my 08 R

Did the afterburner in march and got 10,000 out of the rear and 12,000 on the front as well as track days at Symonds Plains

Regards Brett
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Mr_christopher
Posted on Saturday, October 31, 2009 - 04:58 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Thanks guys. Now the challenge is to find somewhere that'll do it on Monday (Tuesday is a public holiday here).

Silly question - but I'll ask it anyway - is it ok to have different front & rear brands? My rear tyre is fine and I'm wondering if I can upgrade just the front at this point.
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Jdugger
Posted on Saturday, October 31, 2009 - 08:11 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I have been known to mix and match tires, and it works OK, with the expected impacts on handling. A lot of times the bike isn't "ideal".

You know, I really recommend you go get your baby some new shoes. Spoon on a new set, front and rear, of the Corsa III. Take those to the track, enjoy them, and then ride them on the street after your trackdays. You will get a lot more even wear of the tire.

There's nothing that makes a bike run better than a new set of tires.

You know how your car always runs better after you wash it?

It's like that... only much better.

All fun and kidding aside, new tires are the right choice, K?
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Jdugger
Posted on Saturday, October 31, 2009 - 08:15 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Oh, on the Corsa III, for a novice pace, aim for your STRIGHT OFF TRACK, HOT PRESSURE to be about 33 front and 33 or 32psi rear.

If you feel the rear give, back it down to as low as about 30 psi HOT, and the front can be as soft as 32 HOT.

That's going to translate to between about 26-28 psi cold pressures.

It seems ludicrous at first, in particular if you are used to "street" pressures like 34/36, but it's the right settings to use.

The tires will get a lot hotter and perform much better if you run them at the correct pressures for application.

I'm so jealous because I know it's summer there. We didn't get a summer this year in Dallas, Texas. Only rain and cold.
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Slaughter
Posted on Saturday, October 31, 2009 - 09:51 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Something to consider regardless of whether or not you have "enough" rubber left: the whole tire profile has changed which will affect turning/handling.

NEW is good all around. Tires (tyres too : D) are the LAST thing you want to have in your mind as you're entering a turn on the track!

Phillip Island... you're getting a LOT of us jealous here! (especially as our season is ending)
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Fresnobuell
Posted on Saturday, October 31, 2009 - 11:47 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Going to the track with flat bottomed tires is not fun. Going to the track with fresh rubber is awesome. Change the tires.
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Kevin_stevens
Posted on Saturday, October 31, 2009 - 04:18 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Something to consider regardless of whether or not you have "enough" rubber left: the whole tire profile has changed which will affect turning/handling.

NEW is good all around. Tires (tyres too ) are the LAST thing you want to have in your mind as you're entering a turn on the track!

Phillip Island... you're getting a LOT of us jealous here! (especially as our season is ending)


Here in CA the season never ends! Just to keep you jealous, I have a track day scheduled at Laguna Seca next month. The CR is my fallback bike - hopefully I'll be on a new BMW S1000RR.

KeS
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Mr_christopher
Posted on Saturday, October 31, 2009 - 08:24 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I have a track day scheduled at Laguna Seca next month.

Wow, Yeah I think Id swap The Island for a crack at the Laguna Seca.

Thanks for all the help. Seems fairly unanimous I guess! I know that tyres are a personal thing but is there a consensus on the better tyres for our specific machine?
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Jdugger
Posted on Saturday, October 31, 2009 - 08:57 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

The only thing wrong with California is.... Californians.

What a waste of an amazing place.

: )
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