MPA Vibration

[Deadeye]

Had a Michellin MPA put on my GL1800 Hannigan this morning.Mounted in reverse. <br />
Y'all were right - ride and handling (and steering) immediately improved over the Metzler that was there when I bought the trike.<br />
OK now the problem- there is a quite strong buzzzzz(vibration) between 25 and 35 miles per hour. I can feel it in the handlebars and it is the same when accelerating or decelerating and with clutch in or out. If I gently depress the front brake I can feel it in the brake lever too.<br />
Has anybody had this problem and if so, what did you do about it?<br />
I've only put 100 miles or so on the tire - maybe the buzzzz will just go away? <br />
Thanks in advance for your thoughts.

 

[Lucky]

Not an expert,but I would think you have a balanceing problem.RIDE SAFE

 

[Gold Rush]

I imagine some of the MPA users will chime in here soon but I believe that is the "Buzz" most MPA tires have when used on trikes. Can't imagine you haven't seen it mentioned many times...

 

[1800 06 Champion Trike]

No problem with my MPA mounted in reverse at 41 psi.
I got 28,000+ miles out of my first one and now have 3,000 on the new one.

I would recheck the balance.

 

[jfingalls]

Mine never made a noice but do what our friends above suggested, balance it. I have yet to find a tire that is perfectly balanced. By the way, I mounted mine in the proper rotational direction and did not get the buzz. Good luck....

 

[Tip Schwartzbeck]

I am curious as to if you have weights or balance beads?If beads,you may have a vibration up to around 25 or so with Dyna Beads.I have a "buzzing" sound on occasion but I think it is my beads.
Good luck,
Tip

 

[john]

put on a set of centermatics on your front wheel. i did and have no more problems with balancing my front wheel. and 10000 miles with no cupping.tire is real smooth.ThumbUp

 

[msrvpeig]

Deadeye, I have had 3 MPAs on two different trikes, all mounted in reverse and all three caused a "buzz" between 25-35 mph. Some were balanced with weights and some with dyna beads. Didn't matter. Overtime, either I got used to it or it disappeared, not really sure which. I got in excess of 20k miles on each one, but they all cupped to some degree.
Fyi, I'm currently trying a Bridgestone 45 with dyna beads. No "buzz" for the first 5k miles. I have also installed the Tireguard TPMS system and no cupping so far. If the mileage equals that of the MPA, I'll be a Bridgestone 45 fan going forward.

 

[Deadeye]

Thanks all for your thoughts. The tire is balanced with no dyna beads. I have put on another 150 miles or so and the buzz is still there. I may just have to learn to enjoy it but I want to make sure it won't be a problem as I'm leaving by myself to Alaska in about 3 weeks.
Thanks again,
Deadeye

 

[Comanche]

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<img src="images/misc/quote_icon.png" alt="Quote" /> Originally Posted by <strong>john</strong>
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<div class="message">put on a set of centermatics on your front wheel. i did and have no more problems with balancing my front wheel. and 10000 miles with no cupping.tire is real smooth.<img src="images/smilies/thumbup.gif" border="0" alt="" title="ThumbUp" class="inlineimg" /></div>

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</div>Me too. I also put nitrogen in all three tires. Definitely have a softer ride and nitrogey has larger molecules than air and supposedly makes the tire ride cooler.

 

[dstott]

Me too. I also put nitrogen in all three tires. Definitely have a softer ride and nitrogey has larger molecules than air and supposedly makes the tire ride cooler.

You are aware that air is already 78% Nitrogen, I assume? My assumption has always been that as I lose air through the permeable rubber sidewalls, it is the smaller molecules that are lost and that by replacing that loss with 78% Nitrogen air, I am constantly increasing my Nitrogen percentage. It will never reach 100%, but since my project is free, it seems close enough. I'm more than willing to hear from a more learned source if my theories are incorrect.