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Discussion Starter #1
Hello everyone.

I'm hoping someone might be able to give me a bit of advice regarding the tyre wear on my 2011 Gen 4 and whether the wear pattern is saying something about the bike setup and potential improvements I could make.

I currently have on the bike the Q2's and they have 2000km's on both the front and the rear (1240miles) and they seem shagged. After my latest ride there appears to be chunks coming out of my rear tyre and what I think is blistering on my front. I've never had blistering before and I'm worried about what I'm doing to cause it. Photos below btw I used a torch to highlight the wear.







I have had my stock sag set by a local suspension specialist (he was grumpy and didnt tell me the sag settings :dontknow: but he is a well known guy in Canberra and known to be good) and I run the tyres 36 rear 32 front. I am currently 87kg (190lbs) with gear.

Other riders I have asked seem to get significantly more milage out of the Q2's tyres (though on different bikes). I run the bike on full power with traction control mode 2.

Anyone in a similar situation? any hints about what the wear is saying?

Any help would be appreciated.

Cheers
 

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Well, I'm no expert, but those look bad. Diagnosing tire issues is an art for sure.

The front is tearing something awful. With that pressure in the front, it may be allowing the front to build too much heat and you're hot tearing the rubber apart. First thing I would do is increase the front pressure slightly (try ~2psi cold to start). Increasing the pressure will help stiffen the carcass and not build up so much heat in it from flexing.

The rear to me looks like it's been ridden hard, but not really abnormal. Those "chunked" areas are just what's left of the tread blocks on the sides.

Q2's are not a good tire for mileage at all, but the fact that you're still riding on tires in that condition is a testament to their traction level. Those tires are definitely shot and I certainly wouldn't be running on that front tire any longer in that condition.

Here's some more info if you're interested.
http://2wheeltuesday.com/2009/06/diy-how-to-read-the-tire-wear-tire-tear-on-your-motorcycle/
 

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Discussion Starter #3
cheers for the link!. Some good info there.

Those chunks are actually in a different location than the original side tread grooves. Thats why I was concerned.

I know tyre reading is definatley an art form I wish I had more experience with it.

Thanks
 

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how old are those tires...4 digit date stamp is on the side. i've ridden thousands of miles on q2's and never seen that happen. it does with old tires, or ones with had a lot of temp changes or are stored improperly or
 

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Wouldn't be to concerned with the rear as mine looks the same and I've got an ohlins rear shock I run tc1 and full power mode... I usually only get around 2000 to 2500kms out of a rear Q2 which I still found was better then s20s. :headshake
 

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i usually get between 6-8000 miles on q2's...not sure how you guys are getting so few...

well, rooter, for you i'd say heat.
 

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Your front tire is way to high. Your rear is just a little high. Dunlops are a hard compound tire and need far less pressure then say michelins or pirellis. Try 32/30 or 30/28. Was that street riding or track?

Also how did the bike handle? Slow, very tippy, front trying to wash out, rear sliding a lot, etc...?
 

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i usually get between 6-8000 miles on q2's...not sure how you guys are getting so few...

well, rooter, for you i'd say heat.
There's no way I could ever get even half of that... In the club I ride with which all are very experienced riders, most are racers if not ex racers and one Steve Mudford owns a sportsbike suspension store all get around the same best is around 3800km on Q2s.

On Dunlop sportsmart which I don't think you get in the states there getting around 5000km.

Hate to say it but if you're getting 13000kms out of Q2s or any soft tire you're going to slow :wink:
 

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There's no way I could ever get even half of that... In the club I ride with which all are very experienced riders, most are racers if not ex racers and one Steve Mudford owns a sportsbike suspension store all get around the same best is around 3800km on Q2s.

On Dunlop sportsmart which I don't think you get in the states there getting around 5000km.

Hate to say it but if you're getting 13000kms out of Q2s or any soft tire you're going to slow :wink:
out of a street tire i am, daily commuting and weekend twisty riding. i have a track bike for going fast haha and those do not last very long but even on the track i get q2's to last a good long while

one thing to keep in mind is the heat of aus probably plays hell with the tires as well, don't really have that problem up here
 

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out of a street tire i am, daily commuting and weekend twisty riding. i have a track bike for going fast haha and those do not last very long but even on the track i get q2's to last a good long while

one thing to keep in mind is the heat of aus probably plays hell with the tires as well, don't really have that problem up here
Fair enough... Yeah no commuting on mine and it does get hot here
 

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Discussion Starter #12
I have only done weekend spirited street riding with the tyre. Though the route has aggressive surfaces and some undulations I was hoping for more life. The tyres arent that old. The temps I ride in go from around 15 dgrees centigrade to 30 degrees. I dont ride in temps over that.

The front felt alright with turn in. I was less alright after seeing the tyre after my last ride though.the strange thing is I nomally hit the right hand turns harder but the damage is on the left side of the tyre.

The rear felt like it was skipping over bumps alot. Im not very experienced with high power bikes but I assume that may be the tyre spinning.

The pressures are what ive been recommended by the suspension guy.

(Kind of) Glad to see im not the only one with low tyre life. I hear people quoting 2 to 3 times my tyre life and get worried.

Cheers
 

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One way to get an idea of what your tire is experiencing, is to measure the cold pressure (prior to riding) vs. when the tire is hot (after riding)

A good indicator that you are somewhere close to where you need to be is to get a difference of 10% pressure reading between hot and cold. Eg. 30psi cold vs. 33psi hot
 

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30/30 is a good starting point for the Q2's for the track. Are you checking them after you heat them?
 

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Discussion Starter #16
I havent been checking hot pressures. As I've been street riding only.

I will start measuring hot pressures.
I see 36psi reccomended alot as a hot pressure.

Whats a recommended pressure for Q2s?

Cheers
 
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