inspectsir
Member
Just got new front tires (Vredestein Quatrac) on the RT. Running 20 psi and getting some bounce. Should I lower the pressure?
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Front Tire Bounce
- Thread starter inspectsir
- Start date
K80Shooter
New member
Yes you need to lower the pressure some (16-18 psi). Was the tire balanced? Also was the DOT lined up with the valve stem?
Did you furnish the tires or the place that installed them? I would take it back and have the balance re-checked.
Did you furnish the tires or the place that installed them? I would take it back and have the balance re-checked.
BajaRon
Well-known member
It depends on what is causing the bounce. If you hit a bump and it bounces too much as a result, lowering tire pressure should help. But if it's just bouncing for no apparent reason, then you're probably looking at an Out-Of-Balance tire. And tire pressure will probably do little to correct it. Alignment, though very important, probably won't help with this particular issue either.
Be sure the tire is fully seated on the bead of the rim, inside and out. I've seen this cause a balance issue. Did they balance the tires when they mounted them? Spin the tire by hand off the ground and check for roundness. This will also show a bead seat problem. Vredestein makes an excellent tire. But no one is perfect. Could be a bad one.
Hope it's a simple fix.
Be sure the tire is fully seated on the bead of the rim, inside and out. I've seen this cause a balance issue. Did they balance the tires when they mounted them? Spin the tire by hand off the ground and check for roundness. This will also show a bead seat problem. Vredestein makes an excellent tire. But no one is perfect. Could be a bad one.
Hope it's a simple fix.
BLUEKNIGHT911
Sadly Passed Oct 2024 - RIP
:agree: .... That Q-5 could be bad , but it's not likely..... not all spin balance machines are created Equal, and IF they arn't checked for calibration periodically, they may not give accurate info, also the person doing the balancing may not know how to use the machine properly. good luck .... Mike :thumbup:
BajaRon
Well-known member
Good advise. These systems, (Laser Alignment, tire balance, etc.,) are not magic. They still require a skilled operator with enough integrity to do the job right. Anyone can buy the equipment. Getting someone who will take the time to do it right, not so common.
LongIsland
Member
K80Shooter: Can you explain the need to line-up DOT with the valve stem? I have never heard of doing this.
Thanks.
inspectsir
Member
I furnished the tires, from Tire Rack. Will call the bike guy to see if tires were balanced.
K80Shooter
New member
Some, not all will have a blue dot on them and the dot should be placed in line with the valve stem and should help with balancing. Not all tires will be marked. Also on problem tires or tires that require excessive weight sometimes it helps to deflate the tire and rotate it half way (180 degrees) then reinstale and rebalance.
BajaRon
Well-known member
The Yellow Dot indicates the Light Point in the tire. Aligning this dot with the valve stem (typically the heaviest point in the wheel) helps balance the assembly, thus requiring less weight to get to final balance.
The Red Dot indicates the highest point in the tire. Tires never being perfectly round. Some wheels have an indicator for the lowest point (Blue Dot or drilled). Lining up these 2 points will tend to give the roundest tire.
The Red Dot takes precedence. But most wheels have no indicators, so the Yellow Dot is what is usually used.
I am not sure what a Blue Dot on a tire would be. Maybe just a Yellow Dot in a different color.
All of this is generally ignored when mounting a tire. Saves time and the wheel isn't going on their vehicle.
Here is an article that explains this.
https://www.topgear.com.ph/features...the-sides-of-new-tires-are-for-a2600-20181008
K80Shooter
New member
Ron, the blue dot means either the person is color blind or his memory is fading, I fit in the latter category. 
pps:
There was once a blue dot on some wheels which is where one would align the red dot on the tire with, sometimes there was a dimple on the wheel. (I see Ron posted this also)
pps:There was once a blue dot on some wheels which is where one would align the red dot on the tire with, sometimes there was a dimple on the wheel. (I see Ron posted this also)
arkyleo
Member
Good luck finding a tire shop or car dealer with small enough cones to fit the Spyder front wheel holes. Mine are slightly out of balance so I called or visited every tire place with an I-force spin balance machine and their smallest cones were too large, The center holes (on the 2021 and probably others) are 1.9" or 48.5 mm.
I know my Can-Am dealer (100 miles away) can do it, but they are running 6 weeks out with only one tech. I may try a bubble balance that I can do myself and see it that makes a difference until I can get an appointment with the dealer or LaMonster.
I know my Can-Am dealer (100 miles away) can do it, but they are running 6 weeks out with only one tech. I may try a bubble balance that I can do myself and see it that makes a difference until I can get an appointment with the dealer or LaMonster.
PMK
Active member
Others have visited a good local tire shop, found out the model of the tire balancing machine they use. Then purchase the correct cone themselves. Take the cone and tires when balancing is needed.
RICZ
New member
You live in the wrong part of the country. Many tire shops and full service garages here will mount and balance. I went to favorite and they were happy to do it all on a ride in basis.
RICZ
New member
I-force not needed on tires that carry such a light load compared to cars and trucks.
BLUEKNIGHT911
Sadly Passed Oct 2024 - RIP
I find this contrary to everything I know about - Why front tires need to be balanced..... There are two ways to learn if your tires are balanced ... #1- you drive your Spyder and discover whether they cause a Vibration .... or #2- you spin then on a machine and the machine tells you if they are or arn't balanced. The LOAD on the tires is not part of the equation..... There are some very lightweight motorcycles that will let you know if ther tires are balanced or not ..... good luck ..... Mike :thumbup:
RICZ
New member
Easy there Mike. Yes, tires need to be balanced, no question. But the I-Force is not for the lightly loaded tires of a Spyder. IMHO
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