Wheel Balance Question

[cyberswine]

Just had a pair of Rosso IIs installed by a very reputable shop and I'm feeling a very slight vibration in different power bands that wasn't there before.  I think.  Obviously they feel different so I'll continue the break in and run up a few more clicks over the weekend and see how it goes.  The question is that I find there are no weights on the front wheel at all when previously there were weights on both sides.  One of the threads I searched made reference to a rare "natural balance" without weights, just for my information if I do go back to the shop after the weekend..... how often are no weights required on a new tire install?

[oldndumb]

Front wheel "rare natural balance" is not that unusual. It actually depends on the empty rim balance.

What is unusual is to feel vibration immediately after a wheel balance.

[Speeddog]

I've had it happen 2-3 times in all the tires I've mounted.

Which would put it ~1% chance or less.

[BK_856er]

Just yesterday had some pilot power 3 installed on billet aluminum OZ wheels and the front didn't have weights.  Double checked with the installer and he said it balanced up fine without them.  Rear needed just a tiny weight.  Hopefully this batch of rubber is nice and true and not just sloppy balancing.  Haven't put the wheels on the bike yet.

BK

[Speeddog]

The fully machined wheels tend to be much better than the largely un-machined cast wheels.

I did some tires on some *old* wheels, they were so out of balance I took the tires off to check ....
IIRC the wheels with no tires took 2 oz or so.

[SpikeC]

Just had a pair of Rosso IIs installed by a very reputable shop and I'm feeling a very slight vibration in different power bands that wasn't there before.  I think. 

I would think that an imbalance would vibrate more as speed increased, instead of being related to power bands.........

[Curmudgeon]

Speeds..., or power bands?!

If the wheel and tire ARE truly balanced, maybe worth it to loosen up the front end, bounce it around a bit, and button it back up in the right order? Anything else different?

Good luck!

[theoneillusion]

Does anyone use those dynabeads to balance?

[Howie]

I would also check chain tension and condition as well as rear wheel alignment.  Wheel balance vibration is speed related, not RPM related.

Does anyone use those dynabeads to balance?

Not me.

[kokis]

Does anyone use those dynabeads to balance?

I had pack of them. Was not able to insert them into wheel. It took one hour to insert 5-10% of needed amount. And as I understand they don't work on slow speed. Balanced wheel with old school lead attachments.

[cyberswine]

Thanks for the responses, after a tank and a half of gas and some high speed slab and tight ramps it seems all is good notwithstanding the lack of weights on the front.  The occasional slight vibrations I was feeling seem to relate more to the tires providing a more direct feedback on differing road surfaces rather than wheel balance as first suspected.  They almost seem to be over inflated but I'm running at the book - and my regular - 32/36.  It's not unpleasant and the tires are excellent, just a slightly different feel to them.  I'm curious if anyone else using them has the same impression?

[Curmudgeon]

What are you using for a gauge? Are you sure it's precise? "Book" is 2.25/2.5 BAR = ~ 32.5/36.25 How much do you weigh?

Wasn't your bike delivered with Rosso's? Rosso II's are allegedly the same on the sides but harder in the middle for longer wear. Could that account for what you are feeling?

[Greg]

Does anyone use those dynabeads to balance?

Dynabeads are awesome, I've been using them in my bikes for a couple years now. Started using them after I bought a Nomar tire changer, and have not looked back since. My buddy also uses them in his Streetfighter and 848 and we've never had a problem, the ride is glass smooth every time.

If you take your bike to the track and get the tires very hot then don't use them. I used them in my Monster on the Q2's at the track and had no problems with them, but if you run warmers then definitely do not use them or they will stick to the inside of the tire instead of spreading out evenly.

I've heard a lot of people talk shit about them but funny how none of them had ever tried them, those that have loved them.

PS: Best way to achieve natural balance is to static balance the wheel without the tire on. Supposedly where the valve is should be the heaviest part of the wheel, but I've rarely found that to be the case. If you find that heavy spot and mount the tire with the dots next to it (instead of automatically at the valve) you will get a better natural balance. You might still have to add a little weight, but often far less then usual.

[cyberswine]

Rosso II's are allegedly the same on the sides but harder in the middle for longer wear. Could that account for what you are feeling?

Almost certainly the answer, although the sides are a different shape with a slight extra 'shoulder' to them.  Pressures are set with the same gauge I've used for several years, I've been tempted to try them with a little less air but don't want to degrade either performance or tread life.  Probably just over-thinking the whole thing 

[Curmudgeon]

Almost certainly the answer, although the sides are a different shape with a slight extra 'shoulder' to them.  Pressures are set with the same gauge I've used for several years, I've been tempted to try them with a little less air but don't want to degrade either performance or tread life.  Probably just over-thinking the whole thing 

Thanks for the info and feedback as that's probably my next set. Stiffer sidewalls is interesting. Harsher ride? Same good grip? Predictable? Post back here if you observe anything else.