Question about tires - BMW Luxury Touring Community
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post #1 of 6 Old Aug 26th, 2016, 2:19 pm Thread Starter
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Question about tires

The tire in question is a Bridgstone Battleaxe 021, but I think my question is not brand specific.
How important is direction of rotation? Is it just to help the tread evacuate water from under the tire? or, Is it related to the cords, or carcass plys? Will I damage the tire by running it backwards?

The tire in question is from a K1200S rear wheel. I want to run it on a R1200GS.

1999 K1200LT Rat Bike Sold
2000 K1200LT Black Bike SOLD
2003 K1200RS Alpine White and Blue SOLD
2002 R1150GS sold
2008 "smart"
2001 K1200LT current project, AKA M1.2, AKA Horten 229
2002 F650GS It's runnin y'all
2005 K1200S
2012 R1200GS Rally
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post #2 of 6 Old Aug 26th, 2016, 3:06 pm
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Re: Question about tires

The word from Metzler listed on another forum.

From: "Metzeler B2C Moto, US"
Date: November 29, 2010 15:50:31 CST
Subject: RE: Front Tire rotation direction

Hello

Tire's have a tread pattern and tread cap (compound) orientation that is important to the safe handling of the application. Metzeler uses a ME880 tread orientation for the front tire (that is different than the rear) to promote the best possible water dispersal and to help clear a path for the rear. This tread design also helps the tire wear as evenly as possible over it's lifespan.

The construction differences between a front and rear tire are radically different in material, shape, pattern, and compound because each tire has a different function. So we can say the front tire steers, handles the big braking forces, and clears water for the rear in the wet, and the rear puts down the power and propels the bike forward.

If after checking you find the tire is actually mounted backwards then for safety sake you probably should replace it. We would suggest that contact your local Metzeler dealer and ask for assistance in this matter. Thanks for the question and have a great day.

NA Metzeler Consumer Affairs
877 202-4993

Gordon
Sugar Hill, GA
2001 K1200LTI – Champagne (current ride) Lazy Susan
1998 R1100RT – Never should have sold it
1974 Yamaha TX 750 Twin. Omni Phase Balanced


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post #3 of 6 Old Aug 27th, 2016, 1:39 pm
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Re: Question about tires

Rule of thumb if you are using a tire that is designed to be a "rear" tire and you are using it on the front - reverse the direction. Like wise for a front on the rear. A rear tire is designed to grip the rim and resist spinning on the rim under acceleration and a front is designed to resist spinning on the rim under hard braking.

In your case is the tire is on the rear of the GS you need to fix it.

John
2009 K1300GT Red Rocket
2009 R1200GS (Gone)
2005 K1200LT Ocean Blue Blue Wizard 110 K and counting...
2006 Bushtec Turbo+2 Spell
2004 330 Ci Convertable
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But lack DE, MA, RI and CT with the 2005 LT

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post #4 of 6 Old Sep 17th, 2016, 10:24 pm
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Re: Question about tires

I've heard from a "friend" that he mounted a rear backwards and that he didn't discover it until he removed it, he couldn't tell for the life of the tire (12k).

I look at all the motorcycle tires and car tires and all their different tread patterns and have pretty much decided that there isn't one optimal tread pattern. It really doesn't matter as long as it sheds the water, otherwise all tires would have pretty much the same pattern -it seem to really be about marketing.

Would I not do best with what a MotoGP rain tire has for a tread pattern?

_____________

Kim Thomson
Motorcycle Cigar Smoker
05 K1200LT - The Golden Rocket Ship
91 K100RS - The White Stallion
85 K100 Standard - Big Red
79 R65 - "The Bee" is a buzzin' again!
06 525i - Premium, Sport, Comfort, Xenons

Gone, but not forgotten...
02 K1200LTC - Big Blue (accident at 40k)
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post #5 of 6 Old Oct 4th, 2016, 8:32 pm
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Re: Question about tires

Guess my comment was out to lunch. I was half right but for the wrong reason. Here is a FAQ from the Avon web site:

Can I fit a front tyre on the rear and a rear on the front?
Avon would not normally recommend this fitment. If you do this however, due to the way tyres are manufactured, you should reverse the tyre’s direction of rotation if you fit a front tyre on the rear or a rear tyre on the front of your bike. During tyre manufacture, a length of tread rubber is wrapped around the carcass and joined together with an angled bevel type joint. This joint is orientated so that as the tyre rotates, this joint stays shut. As the rear tyre provides drive and the front tyre provides braking, the joint is made one way for the rear tyre and the opposite way for the front. Fitting incorrect tyres could cause potential MOT/insurance issues and may affect the bikes handling capabilities.

I had always thought it was grip on the rim but it appears to be the way the rubber is applied to the carcass.
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John
2009 K1300GT Red Rocket
2009 R1200GS (Gone)
2005 K1200LT Ocean Blue Blue Wizard 110 K and counting...
2006 Bushtec Turbo+2 Spell
2004 330 Ci Convertable
K4AN

Have ridden a Motorcycle in all 48
But lack DE, MA, RI and CT with the 2005 LT

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post #6 of 6 Old Oct 29th, 2016, 6:05 am
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Re: Question about tires

Nice.
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