JGardy_781
Member
Sure.erick1670;132921 wrote: ...can I run slicks on the RC?
Sure.erick1670;132921 wrote: ...can I run slicks on the RC?
Heartland.pearsonm;132932 wrote: Anyone know which is the least abrasive between Hallett, Heartland and Barber? I may be doing Hastings, Putnam and (hopefully) Iowa as well.
mike574;133313 wrote: for the 2 rears i have been through that is the same wear I am getting. I did have one come aspart after 1 session though, trying to get it replaced.
looks like youy have suspension issues. could be anything from the looks of it. im not a big fan of diagnosing suspension from a picture but it doesnt look goodmike574;133313 wrote: for the 2 rears i have been through that is the same wear I am getting. I did have one come aspart after 1 session though, trying to get it replaced.
This is basically what I've been hearing from other sources as well. I ran another day at MAM on Monday, using warmers this time. Wear looks more or less the same, the rear is basically toast at this point. The front still looks great. I think it's time to go to a harder compound rear and save the other med/soft for the fall.alphamale;137467 wrote: That is completely normal wear for Soft 209 GPA rears with or without tire warmers.
They are meant for the spring and fall, not so much for the summer.
I've been racing with them this year with decent results until the track temps have really soaked up the summer SUN.
The 211GPA medium rears won't melt like that in the summer heat, but they have issues of their own (like separations at the seam) after enough wear and tear.
(heavy sigh)needknees;137473 wrote: This is basically what I've been hearing from other sources as well. I ran another day at MAM on Monday, using warmers this time. Wear looks more or less the same, the rear is basically toast at this point.
+sasrocks;137515 wrote: lots of sage advice here. But guys, all this angst over tire wear and abrasive vs non abrasive tracks and trying to conserve your tires to get the last penny from them is right and noble in the financial sense... However, one truth is self evident:
Studies show that tires are in fact, cheaper than body work.
Run the right pressures, make every effort use warmers for those tires that need it, try to get the right compounds for the temps and surface, but sometimes thats not possible. Dont sweat it. Change them out before they let you know you were too late.
And if you are running a liter bike, dont be surprised when your tires get gnawed up :d
More or less two so far. I had a third but I didn't ride much and it was all in the rain or on a wet track, so that doesn't really count. I'll grab pics tonight of their current state. I should be able to get one one more day out of them but I am going to buy some takeoff slicks to use at MPH coming up in a couple weeks.pearsonm;137499 wrote: (heavy sigh)
So how many days did you get out of the rear? I saved my D209's for Heartland 7/25 with the hope that I'd like them for Barber 8/28-8/29, but now it looks like I need a cool as well as non-abbrasive track.
needknees;137580 wrote: but I am going to buy some takeoff slicks to use at MPH coming up in a couple weeks.
That's good to know. Thank you for the information. I've got to decide if I'm going to burn these up at Heartland and MAM or save them for Barber.needknees;137580 wrote: More or less two so far.
I am not sure about this. Some tires are in fact more expensive than some bodywork. :dunno:sasrocks;137515 wrote:
Studies show that tires are in fact, cheaper than body work.
needknees;132340 wrote: Yesterday was my first time to the track with actual track tires!
Something isn't quite right.
Info:
Bike - CBR1000RR
Tire - Dunlop D209GPA. Med/soft rear, Med front (Trackday Store super combo special)
Track - MidAmerica Motorplex. 2.2 miles, 14 turns, clockwise.
Rider - intermediate noob.
Weather - ~80F and mostly sunny
Pressures - Started the day 31F/21R cold per Dunlop's suggestion. Hot off the track I was at 35f/27r. I dropped the front down to 34 and rear to 25 hot. After that I had more or less consistent hot pressures of 34f/26r. IIRC Dunlop suggests hot pressures of 34F/24R but don't quote me on that.
This was after only one day at the track, put 104 miles or 47ish laps on them. The front looks pretty good (might want to go down a psi or two???) but the rear isn't looking too hot... what the hell do I need to change?
Right side of rear
Edit: Won't let me post all the pics. Will follow up with the rest.
It doesn't look quite as bad as I thought it did at the track, but :damn:. Is this some kind of hot or cold tear? Rebound issue? I need to watch that OTT Dave Moss video again.
Edit. Watched part of the dave moss video. Sounds like it was a cold tear. Then I found this: http://www.dunlopracing.com/Pressures.pdf . That kinda backs it up. I was running way too high of pressures.
Thoughts or suggestions?
I bought a set of warmers and ran them at my last day. The wear looks very similar. Here's current pics -- Two good days, one rainy shitty day with little riding on these tires. I agree there's something up with the rear shock rebound, I'm getting a buildup of rubber on the leading edge of the sipes. Do I need to increase or decrease rebound?Big Deezul;137867 wrote: looks like you could get some of that rear wear out by playing with your rebound settings. They do tear if you are not running warmers, but most of that can be adjusted out