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Old 07-28-2014, 07:01 AM   #1
Cortez OP
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Location: Croatia
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How worn are my Metzeler Z6?

This question pops up a lot of various forums since these tires don't have
a groove over the very center. Mine are obviously not that worn yet, but
I have no idea if I'm looking at 1/3 left or 2/3 left, I never measured anything
while they were new.

Someone who went through more then a few sets might be able to assess
these better then me.

Tires are 13 months old and have 10.000km on them (6250 miles) on a
FZ6n (not a heavy bike, not much torque, I'm ~220lbs+gear):







Outer tire wear indicator says 3mm:


Inner tire wear indicator that's closer to center says 2.9mm:


I tend to ride rather conservatively and keep the rear tire between the low
and high value recommended for the bike (since I'm not that light and always
have a topcase with crap in it).

Any ideas how much miles this tire has left if I'm at the 6k mark now?
Thanks!
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Old 07-28-2014, 12:11 PM   #2
TrashCan
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I would think you have a little less than half left.

When the center looks like it has 1/4 left, it really does not. The last part goes quick.
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Old 07-28-2014, 12:49 PM   #3
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In the UK its 1.0mm limit for bikes .... and 1.6mm for cars - over at least 3/4 of the tread pattern.

This is a minimum and something I always thought as strange as a bike is more reliant on tyre condition/grip more than a car
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Old 07-28-2014, 05:32 PM   #4
k1w1t1m
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In the first pic you can see the wear bars in one of the grooves.
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Old 07-29-2014, 02:01 PM   #5
Cortez OP
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I shot that shot with the grooves visible on purpose, but there are none
in the middle so it's hard to say.

I've read elsewhere that the middle of the tire goes very fast once it comes
down to last 1/3 of the thread, but honestly, that tire looks like it's got at
least 4k miles in it, if I've done 6k now.

Thanks for the replies.

I'm looking at a 1000 mile trip so.. has me thinking.
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Old 07-29-2014, 10:46 PM   #6
L.B.S.
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Cortez mate, I wouldn't trust it unless you know for sure there are bike shops with tires you would want available, along your journey.

I learned an $$$$ expensive lesson with my Metz Z6 on my BMW. I thought it had lots of life left, and then the next morning, bam! Cords showing! In the middle of freaking nowhere, a loooong ways away from any place with a motorcycle tire period, let alone one that would fit my bike.

Don't be here, with a shagged motorbike tire





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Old 08-01-2014, 09:02 PM   #7
Cortez OP
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Yeah, that seems to be the main concern, but I honestly don't think mine are
that worn at all, there's hardly a flat spot on the center, but maybe it's just
worn evenly and I can't notice how much is missing.

I love the tires other then that design flaw, they're really great, and cheap too.
I'd hate to have to spend more money on the rear tire for this trip then the
what the whole trip will cost me, I haven't had a job in 9 months so I'm a bit
short on cash, and tires here cost more then in USA (about $170 for the rear
Z6).

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Old 08-01-2014, 09:39 PM   #8
BMW-K
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From my experience (four sets of Z6's) Just my opinion but that tire has less than 2,000 miles left on it.
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Old 08-02-2014, 01:18 PM   #9
L.B.S.
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Quote:
Originally Posted by Cortez View Post
Yeah, that seems to be the main concern, but I honestly don't think mine are
that worn at all, there's hardly a flat spot on the center, but maybe it's just
worn evenly and I can't notice how much is missing.

I love the tires other then that design flaw, they're really great, and cheap too.
I'd hate to have to spend more money on the rear tire for this trip then the
what the whole trip will cost me, I haven't had a job in 9 months so I'm a bit
short on cash, and tires here cost more then in USA (about $170 for the rear
Z6).

An FYI if you didn't know; the Metzler Z8 models that superseded the Z6's have hash grooves that cross the centre plane of the tire, making it much easier to see tread wear in the middle.
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Old 08-02-2014, 02:03 PM   #10
Cortez OP
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Quote:
Originally Posted by BMW-K View Post
From my experience (four sets of Z6's) Just my opinion but that tire has less than 2,000 miles left on it.
Thanks!
Today I asked a few friends, I got everything from 2000 miles to another 6000
with the same tempo. It's somewhat annoying.
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Old 08-02-2014, 02:11 PM   #11
Cortez OP
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Quote:
Originally Posted by L.B.S. View Post
An FYI if you didn't know; the Metzler Z8 models that superseded the Z6's have hash grooves that cross the centre plane of the tire, making it much easier to see tread wear in the middle.
Oh yeah, I saw them when they first came out.
I read tire reviews almost religiously.

There's a lot of local riders that seem to prefer the Z6.
Most of them also said that the Z6 lasts longer.

However, most of the same guys said that Z8 is a bit more sporty (easier
turn in and better grip), but the main "issue" for me is that they're considerably
more expensive (PR3 teritory or Pirelli Angel GT, and I'd rather try those.)
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Old 08-02-2014, 06:21 PM   #12
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I ran the Z8s and found them to be worse handling & wore quicker than Z6s. Tried Pirelli Angels & they were worse yet. One of my Z6s had the air showing through on a ride out of town--not fun. On top of that, it was new at the start of the trip. Early reviews on those said the wear indicators were the cords...

I really like the handling of the Z6s, but if you are starting on an over 4K mile trip, start with a new set. I now run Dunlop Roadsmart IIs for those trips.
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Old 08-02-2014, 08:07 PM   #13
Cortez OP
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Quote:
Originally Posted by VFR View Post
I ran the Z8s and found them to be worse handling & wore quicker than Z6s. Tried Pirelli Angels & they were worse yet. One of my Z6s had the air showing through on a ride out of town--not fun. On top of that, it was new at the start of the trip. Early reviews on those said the wear indicators were the cords...

I really like the handling of the Z6s, but if you are starting on an over 4K mile trip, start with a new set. I now run Dunlop Roadsmart IIs for those trips.
Interesting how some people stick with the Z6 and don't like anything else,
I've seen that a lot around here, I'm guessing they just fit some bikes great
and/or a certain riding style.

I think these are the best tires I've had. Sure the qualifiers had more grip,
and the Roadsmarts (1st series) seems to wear a bit slower, but the Z6
feels better to me and it's cheaper then all of the tires both of us mentioned.

My trip will most likely be 1000 miles, MAYBE 1500, that's tops, and
that's NO interstate, probably never over 75mph. I hope they got that much
left in them.
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Old 08-06-2014, 01:15 PM   #14
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If the tire is hardly flat-spotted it has a lot of life left in it. Z6 rears start life with a bit more than 5.5 mm of tread depth. Yes, without sipes on the centerline it's impossible to measure wear with a tool but easy enough if you can imagine the tire profile as a fair curve. Do what you can by measuring the sipe depth close as possible to center and interpolate the rest.

I ran Z6s back in the day, when I was going through 6 rears a year at 6,000 each, and liked them very much.

Judging from the tire scuffs......I didn't think the roads were that straight near your home.
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