Well .... as a "supplemental method" anyway.
Last month I swapped on a new set of 235/55-17 Goodyear RS-A tires
in place of my 2008 Mustangs OEM Pirellis that were showing cracks in the tread grooves. The wheels are chrome American Racing Torque Thrust M 17"X 8.0" with 30mm offset. The TPMS sensors are located opposite the valve stems. We balanced the tires several times until we got them as perfect as the machine would allow and as a result, most all the added weights wound up nearest the valve stems. Several ounces actually .... each wheel.
Well, they were at least as well balanced as the Pirellis (also weighted heavy at stems
) .... but not really "glass smooth". In the last couple of drives on really smooth roads I noted some slight tire imbalance. I have been considering breaking them down and removing the TPMS altogether. I've never needed them before, got along just fine without them.
Many will scoff at the following
..... that's OK.
Was once a time I would have as well.
I was interested in trying a "supplemental balancing"
system, or "maintenance system"
as some put it. Been reading about it mostly on 4x4 and some MC website forums I visit. A few years ago I tried it using "Ride On" liquid tire seal & balance liquid in a pair of Gold Wing tires and they were silky smooth .... same thing except for the mess it can make. Did some investigating and found that bead balancing isn't recommended as a total balance system for 65 or lower profile aspect car tires .... but I have read several industry articles on static imbalance that creeps in when one is balancing a tire dynamically, seems it's more possible with wider low profile tires .... and a couple suggest bead balancing as a means to fine tune the tire statically once the dynamic balance is done.
But in searching for stories / articles outlining actual experience with low profile tires as a supplement to dynamic balancing ...... I found none
readily popping up .... just a few who had read what I read on industry sites.
Yesterday I removed each wheel, one at a time and rolled into the basement, aired down, broke the bead loose on the one side only being careful to avoid the TPMS and poored in 3 ounces of Red Jacket 6MM .15gr Airsoft BBs
. I bought a 10,000 count container of them for a little over $15 at Walmart a few days ago. My math tells me that it takes about 189 of them to make an ounce. I did not count out 567 of them beady little things ..... rather I just weighed them out on a postal scale. Reinflated the tire to seat and adjust to 34 psi and after applying some cleaning and paint to that wheel's brake rotor ..... reinstalled.
Last evening we drove over to Penny's Diner in Low Moor, Va. and used Interstate going over and old US Rt60 coming back. Wide variety of speeds, some hard acceleration, bumps, RR tracks, I'm telling you for a fact that those 3 ounces of plastic beads smoothed it out so there is NO imbalance felt at any speed
. I hit bridge gaps and other thumps and if the beads were dislodged, they rebalanced before we could feel it. "Wife Unit" even commented on how smooth it was.
I know that when the car stops the beads fall to the bottom of the tire .... but as soon as you accelerate, before you even feel any imbalance .... that same imbalance is causing the beads to form up and they balance again .... and seems to me it's happening before you feel it.
I've read of copper coated lead BBs turning to powder, but lead is heavy in relation to volume and not very tough so I can see them beating the crap out of each other. Steel is more dense than these beads so smaller size = same weight ... but then maybe that concentration is why they don't seem to work as well in low profile wider tires?
Dyna Beads are ceramic I think, very small so they can be inserted through a valve stem with the core removed.
These plastic beads don't have the mass per volume as steel or lead or other heavy media, so an ounce will spread out over a larger area
. They are also pretty tough and so they should not turn to dust. I'm sort of believing that their 6mm diameter and lower mass is a plus here in these 235/55-17 tires.
In the next week or so I will be putting another set of 225/60-16 tires on my '92 Thunderbird Sport with it's 16x7 wheels
. It costs so little to try, I am going to simply poor 4 ounces (more because it'll be the primary
) of these same beads into each tire before inflating to try them out as a primary method on a 60 series tire. The web sites that say their beads won't work so well on these tires refer to much smaller more dense ceramic or glass beads .... but these hard red plastic BBs will spread an ounce out across a tire fast (being 6mm diameter each and 189 being an ounce
). Worst thing
that can happen is I have to vacuum the beads out and balance them dynamically first.
I'll post results here.
Maybe someone else has experience in this area to share?
Maybe there's someone looking for info like I was?