What causes this?

**The Stranger:Me** · 9th November 2009, 18:26

Had 2 (brand new) tyres fitted and I static balanced the wheels and fitted them back on.
The bike now has a shake it never had.

So

We have checked the usual suspects (head bearings, brake and wheel runout) all within spec, so pulled the front and rear wheels and had the balance checked dynamically. The rear was pretty close, but the front was asking for 100 grams on the dynamic balancer, so the guy static balanced the front with a couple of 5s.

Still shakes

Ok, pull the front tyre and find this. The first 2 photos are of "unusual" patches (of which there are 4) on the inside of the tyre, the second 2 are of a second hand tyre of the same brand and type for the purposes of comparison. So that has improved the shake, but not eliminated it. Will pull the rear tomorrow if it exhibits the same issues.

So what's happened?
I intend to go back to the supplier to get their take but also keen to see what others say.

Ignore the Hawaiian safety boots, I'm saving for my ACC levy so can't afford decent footwear.

**Sensei** · 9th November 2009, 18:30

Replace both with a new set of the same tyres , looks like a defect in the case's

**CookMySock** · 9th November 2009, 18:42

Buy quality tyres and that doesn't happen - I bet thats not a michelin. I had a brand new shinko go weird on me, but that was a shinko, and thats what ya get with cheap shit tyres.

Steve

**Little Miss Trouble** · 9th November 2009, 19:02

Originally Posted by DangerousBastard

Buy quality tyres and that doesn't happen - I bet thats not a michelin. I had a brand new shinko go weird on me, but that was a shinko, and thats what ya get with cheap shit tyres.

Steve

Does Stranger seem the type to skimp on good rubber?
No. Moron.

**Little Miss Trouble** · 9th November 2009, 19:51

Ouch, red coming from you reeeeeally hurts

**The Stranger:Me** · 9th November 2009, 20:06

Originally Posted by Miss.L

Ouch, red coming from you reeeeeally hurts

She only told it like it is DB, no need to get snarky.

**howdamnhard** · 9th November 2009, 20:11

Looks like the case has been pinched/stressed possibly in manufacture. Take them back and try another one.

**Mishy** · 9th November 2009, 20:40

Hey there,
The little patch is not uncommon - I have no idea exactly what they do, but i'll do some digging.
There look like little scuff marks on the tubeless membrane, which do seem odd.
Normally that would only happen when the tyre is run flat, but I could be misreading the pictures.

**The Stranger:Me** · 9th November 2009, 20:56

Originally Posted by Mishy

Hey there,
The little patch is not uncommon - I have no idea exactly what they do, but i'll do some digging.
There look like little scuff marks on the tubeless membrane, which do seem odd.
Normally that would only happen when the tyre is run flat, but I could be misreading the pictures.

Almost looks like the tyre has been pinched in places within or about those patches (from the inside only) the tyre fitter who replaced them asked if I'd been running curbs. I haven't, well not on that bike, I frequently do on the XT. The tyres were fitted and the bike ridden down the southern to Puke, I noticed a bit of shake on the motorway, but really wasn't going fast at all. At the track however it became somewhat limiting as at 220 it was hard to keep my eyes in focus.
Initially set the front to 34 for the trip down the motorway and dropped it to 30 for the track. Tyre hasn't been run flat and has held excellent pressure. They've been on there for a while as I have been too busy in the last few months to sort this out.

**ManDownUnder** · 9th November 2009, 21:41

If it's a manufacturing fault then you need to keeop using it, crash and pay more in ACC. It's not their fault for getting it wrong - and not your fault for having an accident.

Just pay up... there's a good chap

**R6_kid:Me** · 10th November 2009, 16:28

Originally Posted by DangerousBastard

Buy quality tyres and that doesn't happen - I bet thats not a michelin. I had a brand new shinko go weird on me, but that was a shinko, and thats what ya get with cheap shit tyres.

Steve

They are quality tyres, he just chose not to mention the name so as to not bring the manufacturer, or suppliers into disrepute without due reason as that is not his intention.

p.s. my red hurts more than yours, I just choose not to use it.

**Mishy** · 10th November 2009, 21:01

Originally Posted by R6_kid

They are quality tyres, he just chose not to mention the name so as to not bring the manufacturer, or suppliers into disrepute without due reason as that is not his intention.

p.s. my red hurts more than yours, I just choose not to use it.

Fair call, that way we deal with facts alone !

**CookMySock** · 11th November 2009, 08:26

heh, I have nine vehicles registered on the road, and I have been buying tyres for thirty years, and any brand that I have had a fault on a NEW tyre like that, I will ditch them and never use them again. You should, of course, do as you choose.

Your projection and fixation that I am abusive is product of your own thinking. I made a concise but disparaging remark about the TYRE (which in my opinion was warranted - cap fits wear) and was greeted with abusive name calling from a third party, to which I repped (dissapproving) a concise non abusive reply, with which I am greeting with more abusive replies. Do the math.

The real reason you are only able to see things as abusive, is because that is how you are. Lucky for me it isn't my heart attack. Keep it up and you will die a stressful death by your own hand. Think about it..

Steve