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Wheel heavier opposite to valve

Old 06-20-23, 06:32 PM
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Wheel heavier opposite to valve stem

Normally for unbalanced wheels the heaviest part is around valve hole but in case of Alexrims the heavier part is on the opposite side. Had no other choice but to somewhat balance it out by using some heavy spoke reflectors (serving too functions at the same time while avoid annoying reflective tape or any other non-standard solutions). Couldn't find any instant results on Google search regarding to this so asking here.

Couldn't edit the title again. Correct title was: Wheel heavier opposite to valve stem.
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Old 06-20-23, 06:39 PM
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Wheel heavier opposite to valve stem
I thought that was normal for a sleeve-joined rim.
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Old 06-20-23, 06:44 PM
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yes this is normal, especially if the rim is pinned

/markp
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Old 06-20-23, 06:48 PM
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Riders generally notice unbalanced bike wheels only when they take a wheel off the bike and spin it or when they spin the cranks while the bike is in a repair stand. The imbalance can seldom be detected out on the road.

That said, some people can't stand knowing the wheels are not balanced (the OP, maybe), and some don't care about it, having found it to be a non-issue (me).

Last edited by Trakhak; 06-20-23 at 06:52 PM.
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Old 06-20-23, 07:49 PM
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The reason why bicycle wheels don't need to be balanced is because humans can't provide enough rpm to it to put any wear on the bearings, as the entire wheel itself is practically weightless in the eyes of the hub.

Even in ebikes it has yet to be proven that they create a load on hubs.

The reason why automotive tires must be balanced is because of the overall heavy weight of a car wheel, where just one is as heavy as an entire bike. Any offset and you're changing your front wheel hub bearing assembly after 50 miles. That's why farm folks have to always wash mud out if their rims.

General practice is that the reflector is on the opposite site of the valve to mitigate some weight distribution.

Adding more artifical weight to counter the reflector is pointless, unecessary, and kills extra grams that your poor carbon fiber water bottle cage holder tried to save on.
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Old 06-20-23, 08:01 PM
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If bicycle wheel balance was a thing, big bike would capitalize on it.
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Old 06-20-23, 08:36 PM
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Originally Posted by sysrq
Normally for unbalanced wheels the heaviest part is around valve hole .
Interesting, had not heard this before. Maybe a fancy valve cap would be tidier than spoke reflectors.
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Old 06-21-23, 09:00 AM
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Sounds like a problem made for solution by the stem nut. (And people said there was no need for them!)
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Old 06-21-23, 10:07 AM
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Originally Posted by pdlamb
Sounds like a problem made for solution by the stem nut. (And people said there was no need for them!)
And as they say in Utah, why have just one? Could double or triple nut, chock full o'nuts, whatever.
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Old 06-21-23, 10:32 AM
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Originally Posted by shelbyfv
And as they say in Utah, why have just one? Could double or triple nut, chock full o'nuts, whatever.
Except if your valve isn't threaded...
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Old 06-21-23, 10:52 AM
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Originally Posted by pdlamb
Sounds like a problem made for solution by the stem nut. (And people said there was no need for them!)
Nah, to truly balance the wheel, you need 2 stem nuts - one on each side of the rim to truly clamp that valve in place.
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Old 06-21-23, 12:38 PM
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Originally Posted by soyabean
The reason why bicycle wheels don't need to be balanced is because humans can't provide enough rpm to it to put any wear on the bearings, as the entire wheel itself is practically weightless in the eyes of the hub.

Even in ebikes it has yet to be proven that they create a load on hubs.

The reason why automotive tires must be balanced is because of the overall heavy weight of a car wheel, where just one is as heavy as an entire bike. Any offset and you're changing your front wheel hub bearing assembly after 50 miles. That's why farm folks have to always wash mud out if their rims.

General practice is that the reflector is on the opposite site of the valve to mitigate some weight distribution.

Adding more artifical weight to counter the reflector is pointless, unecessary, and kills extra grams that your poor carbon fiber water bottle cage holder tried to save on.
1.. "provide enough RPM".. so a higher cadence will cause out of balance wheels to bounce up and down? and bearing wear is not the concern.. tires losing contact pressure and annoying vibration IS the concern... at high speeds... ever been on a bike going over 50 mph? Try 70+ sometime... Government Camp, Oregon.. Westbound on Hwy 26 should do the trick for you... i've now met two other maniacs that exceeded the 70 mph mark..on that Same Hill. hit the brakes early for the right hander after the runaway truck ramp.... and hope your tires don't overheat.... the RIM or Disc certainly will...

2... while wheel offset does lend extra loading to wheel bearings, it is not in any way related to wheel spin balancing, other than where weight should be added to counteract the out-of-balance condition... as with bicycles.. Automotive wheel bearings will handle loads FAR EXCEEDING any -out-of-balance loads imparted by an offending wheel/tire combination.... for YEARS. "... 50 miles... "??? HAH! good one!

3.. BUT the wheel/tire combo is always out to the REFLECTOR side, opposite the valve... let's look at WHY that is so...there is a plate and pins, or Welding beads, in the area opposite the valve hole in the rim... welded rims are closer to balanced, but not perfect... the reflector is placed there to make unknowing people feel good about it, and because that's a place where it's easy for factory workers to find for consistent appearance... and guess what? the wheel/tire combo is still unbalanced when the reflector is placed there... Every time... but it looks great, eh?

4..I balanced the wheel/tire combos on my Mitzutani.. the one that hit 72 coming down Hwy 26... it made a big difference..no more scary wheel bounce... well worth the few grams when you're flying down a mountain road at eye watering speeds... and my schwinn stingray got it's wheels balanced too.. smaller wheels spin at a higher rpm when you're flying down a mountain... the stingray regularly had it's speedo maxed.
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Old 06-24-23, 01:08 PM
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Originally Posted by shelbyfv
Interesting, had not heard this before. Maybe a fancy valve cap would be tidier than spoke reflectors.
That's according to Hambini, but apparently it doesn't apply in all cases.
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Old 06-25-23, 01:20 PM
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Government Camp, Oregon.. Westbound on Hwy 26 should do the trick for you...
I used to dream about going down that hill. Today there's so much traffic I'm wondering if a good early 6AM start might be the way.

Back in the 1960s in PA we had a few hills we could get over 50 on our 3 speeds. Never noticed any "humping" or unbalanced effects even though the wheels would right themselves valve side down with the frame upside down or suspended when working on them.
Having heavier frames may have absorbed such forces
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