Metzeler ME 880 Tire Pressure - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 32 (permalink) Old 02-20-2012, 01:42 AM Thread Starter
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Metzeler ME 880 Tire Pressure

I've got Metzeler ME 880 Marathons. Front 100/90; Rear 150/90. Vulcan Verses says to run 29 psi front and 34 psi rear, but these specs are for the original stock tires. Tires are stamped max cold psi 42 front and 50 rear. I weigh 235 and only ride solo. Any recommendations on what tire pressure I should run? Thanks

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post #2 of 32 (permalink) Old 02-20-2012, 04:35 AM
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I have always run ALL tires, both car and motorcycle, at the "max" recommended pressure stamped on the sidewall. Though it says "max", it is well within the safe range. Tire companies are probably the most often sued of all vehicle component manufacturers, and they would never recommend anything unsafe, or even close to it. I also have ME880s, and run them at that pressure. I got over 18,000 miles out of my last set. I weigh 220, and carry another 30-40 pounds of stuff around with me. Underinflation is the leading cause of tire failure and excessive wear. I have found the Vulcan 750 to have soft enough suspension to more than compensate for proper tire inflation. Many people run their tires underinflated for a better ride, but IMO that's just asking for it.

I'm pretty sure the pressure recommended by the original tire manufacturer (Bridgestone) was well above 29 and 34.

Ford messed up big, and got several people killed, when they recommended inflation pressures that were to low for the Firestone tires the Explorer came with. They did this in response to complaints from customers about the Explorer's rough ride, then tried to blame Firestone. I'm surprised it took so long to figure out.

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1997 Vulcan 750, purchased about a week ago
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post #3 of 32 (permalink) Old 02-20-2012, 08:53 AM
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Most folks run the 880s at 38F and 42 rear. This was at one time posted at the Metzler site as the reccomended pressure for the Vulcan 750.

Given your extra weight you might want to increase the rear psi and see if it feels better.

MAX pressure is exactly what it says "maximum safe pressure" there is no reason to run them that high on this bike unless you're approaching maximum load on the bike itself. (360 something pounds)

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post #4 of 32 (permalink) Old 02-20-2012, 09:14 AM
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"Maximum safe pressure" still leaves a wide safety margin. You can bet the tire manufacturers lawyers are not going to let them get anywhere near the edge with their recommendations.

I am a motorcyclist, NOT a biker.


1997 Vulcan 750, purchased about a week ago
2006 Sportster 1200 Low
2013 Royal Enfield Bullet 500, converted to carb
2001 Yamaha XT225, heavily modified
2004 Honda Rebel 250
1979 Vespa P200E
2002 Vulcan 750 parts bike
1994 Yamaha XT225 parts bike
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post #5 of 32 (permalink) Old 02-20-2012, 10:09 AM
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Here we Go...again




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post #6 of 32 (permalink) Old 02-20-2012, 10:12 AM
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The Metzeler website specifies 36psi front/40psi rear minimums for the VN750. Note these are Metzeler's minimums; add psi for passengers, heavy rider, luggage, I hate 36psi, I only run max psi, whatever, etc.

I run 36-38psi front/40-42psi rear for my 155lbs body, no passenger. The +1-2lbs psi doesn't seem to change performance any (that I can tell) and I find that the Metzelers loose a about 1lb psi per month. So, I always add an extra pound or two of pressure to give me a little extra window of time. Beyond 45lbs I find that the performance and ride comfort degrades. Never got to 50lbs, but I'm sure that it would feel like riding on tires made of stone (again, I only weigh 155lbs).

Your weight suggests that you should start a bit higher than the minimums (as Knifemaker indicated) and add pressure or you could go with the posted max (per Jerry) and release pressure to find the right setting for you. Either way enjoy the Metzelers (after you break them in). They turns the VN750 into a sport bike!


Chris Glennon - Portland, OR
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post #7 of 32 (permalink) Old 02-20-2012, 11:27 AM
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For what it`s worth, I read recommendations somewhere that the proper cold inflation pressure is where tire pressure rises 3 psi after 30 minutes or so of highway riding.

Gordon

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post #8 of 32 (permalink) Old 02-20-2012, 11:54 AM
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Quote:
Originally Posted by Knifemaker View Post
Most folks run the 880s at 38F and 42 rear. This was at one time posted at the Metzler site as the recommended pressure for the Vulcan 750.
^^ DITTO ^^

Quote:
Originally Posted by denny6006 View Post
Here we Go...again
LMAO....couldn't agree more
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post #9 of 32 (permalink) Old 02-20-2012, 11:56 AM
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Shouldn't that be again, and again, and again and..............................

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post #10 of 32 (permalink) Old 02-20-2012, 12:21 PM
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Quote:
Originally Posted by OlHossCanada View Post
For what it`s worth, I read recommendations somewhere that the proper cold inflation pressure is where tire pressure rises 3 psi after 30 minutes or so of highway riding.
That's a general guide, but you have to factor in - what's the ambient tempature? A blacktop road on a hot summers day can alter tire pressure even if the bike isn't moving.

The proper way is to take tire tempature readings. A tire with "too much" air can read the same tempature as one with the right pressure, but your supposed to take the lowest pressure with the lowest tempature increase.

Buy one of those infer-red laser temp gauges and you can find your optimum pressure yourself.

You can do it by just checking pressure as Olhoss said , but don't get stuck on finding that 3 degree increase, just find the lowest increase over all at the lowest tested pressure.

OK...now what oil should you use?

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