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Old 09-12-2011, 04:51 PM   #1
TheCowboy OP
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TKC-80 Front Tire Wear

I am on my 8th set of TKC-80's. on my BMW F-800GS My front tire wear seems funny - the two knobs on each side of the center knob always wears out first - leaving me with plenty of meat on the center knob. What causes this? The center knob looks like I still got a good 3000 miles left - but I hesitate to take off on a long trip with the two outside knobs worn down - they are not cupping - just normal wear. Any of you guys have simliar experience with the TKC80's? The rear tire wears normal - it's just the front tire wear that is weird.

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Old 09-12-2011, 05:36 PM   #2
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I get the same pattern on mine, -KLR 650-. I was hoping for a 2-1 (2 rears to 1 front) deal with the front, but there wasn't enough "two knob" tread to flip the tire.
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Old 09-12-2011, 05:52 PM   #3
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what pressure(s) do you run routinely ? do you air way down ?


I've had sawblade wear on the front Karoo T on my V-strom(33psi), ran higher pressure(36psi), didn't happen so severely, ran even higher pressure(38psi) and it went way
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Old 09-12-2011, 06:11 PM   #4
EnderTheX
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I've seen that happen too... I think it is from running low pressure. I never really worried about it...
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Old 09-12-2011, 06:13 PM   #5
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I have never aired down (on purpose anyway), pressure is around 32 psi. The same tire wear is the OP.
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Old 09-12-2011, 09:41 PM   #6
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Heat induced gyroscopic centrifugal forces causing outside two or every other center knob to wear. Should happen every time. Better than chunking knobs. The energy has to dissipate somewhere. Meta-physics of the algorithmic cross sectional tread design. Its a rubber thing.

It means: you've been riding! No worries.

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Old 09-13-2011, 04:20 AM   #7
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And or......you need to pack lighter.

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Old 09-13-2011, 04:22 AM   #8
TheCowboy OP
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TKC80 Tire Wear

I'll run 40 psi for a while (on pave) and see what happens. I run 45 psi on the rear and I get 6000 miles between changes - when I was running 25 in the rear I only got 1500 miles out of a rear tire... air pressure makes a huge difference. Of course riding on dirt/gravel requires an air pressure adjustment - we all know that.

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Old 09-13-2011, 12:47 PM   #9
sturgeon
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I just changed out a front TKC yesterday with about 16,000 km on it, mix of dirt and pavement, run at 32psi for the whole distance. Still had a fair bit of tread on it, surprisingly, but the every-second-knob wear had reduced them to wedges, from braking hard on pavement, I suppose. Trying a K60 now, just for fun.
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Old 09-13-2011, 01:09 PM   #10
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I run mine at 40 psi. At 7k miles now and still rocking.
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Old 09-13-2011, 01:23 PM   #11
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Quote:
Originally Posted by YetiGS View Post
I run mine at 40 psi. At 7k miles now and still rocking.
40 in the front?

Does it go boioioing when you hit a rock?
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Old 09-13-2011, 01:48 PM   #12
YetiGS
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Quote:
Originally Posted by sturgeon View Post
40 in the front?

Does it go boioioing when you hit a rock?
I air down off road. Somewhere around 25psi.
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Old 09-13-2011, 04:59 PM   #13
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Quote:
Originally Posted by Cowboy2 View Post
I'll run 40 psi for a while (on pave) and see what happens. I run 45 psi on the rear and I get 6000 miles between changes - when I was running 25 in the rear I only got 1500 miles out of a rear tire... air pressure makes a huge difference. Of course riding on dirt/gravel requires an air pressure adjustment - we all know that.

TheCowboy
+1

I've pulled 5-7,000 out of a rear TKC running 42 PSI in it. With that same rear I ran 38 PSI in the front TKC... it had lots of tread left even at 6,000 miles. Weird cupping going on though.
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Old 09-13-2011, 07:27 PM   #14
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All of the TKC have cupped on the front. I typically run the tires in the low thirties most of the time, so pressure may not matter.

When I see it, I flip the tire on the rim and the wear evens. From that point on it usually does not come back.

I doubt a dealer will do that for you, for fear you will crash and burn and he will get sued.
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Old 09-13-2011, 07:55 PM   #15
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Normal

This is a common thing with "tready" dirt bike tires.

Both my old 950 Adventure or XR650R both wore out the side treads first, and now my Caponord with TKC-80s.

When the tire rolls the center tread has a smaller surface area and just gets pushed into the tire. Where as the side treads as a team have a greater surface area and take the load of the weight.

If you air up the the tire too much then you will not have as much surface area contacting the ground, the tire will wander and it wont be good.

Have fun!
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