What is causing this back wheel wobble? (While riding I also feel a vertical wobble in the back wheel) Is this doable at home for someone who does minor services like changing pedals, tyres and tuning brakes and derailleurs?
What is causing this back wheel wobble? (While riding I also feel a vertical wobble in the back wheel) Is this doable at home for someone who does minor services like changing pedals, tyres and tuning brakes and derailleurs?
byu/mattiius1457 inbikewrench
by mattiius1457
18 Comments
The rim looks alright so I guess the tire is not seated properly.
It looks like the rim is more or less straight, but the tire is not seated correctly. Look at the thin black stripe on the inside of the grey sidewall, it is very uneven. You need to make sure this is even all around. Deflate the tire, pull on the low areas and reinflate, if it does not pop out, you can also try lubing it up with some soapy water.
Deflate the tire fully. Apply soapy water between the rim and tire. Reinflate.
If that doesn’t work, do it again, but hold the wheel horizontal and overinflate by 30% or so.
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Tyre.
My guess is rim tape is stopping the tyre from sitting in the bead seat. Tyre off and check.
Tire not seated uniformly. Deflate, wet the bead with soapy water and quickly inflate to just above the max pressure. It should “snap” into place. You may have to try this several times.
When you say “vertical wobble” do you mean a periodic bumping feeling? If so, check whether your valve is sticking through the rim straight or at an angle. If it’s at an angle then your tube may have folded up on itself. Fix this by deflating, re-aligning the tube so the valve sticks through straight and then reinflating. Might have to pop one side of the tyre off if it’s stubborn. If the valve is straight then go around the rim and check the bead is seated properly all the way round – you could possibly have a little bit of tube pinched between bead and rim.
Deflate and spray the beads with soapy water pump till you hear some pops
Maybe the spokes are not properly tense. There is this red little tool which you can turn the small piece on the outer part of the spokes with. It’s not easy to get it right so watch a tutorial or get help from someone who knows (if that’s the problem)
Tire isn’t seated properly, I can see it in the pic
I can see where the tire dips in the video. The beading on the tyre is not seated.
Remove some air pressure spray some soapy water where the dip is and inflate again. You should see an even band around the rim when it’s seated correctly.
I’ve had tires go bad from storing bikes the tire sidewalk/ tread gets damaged from the weight of the bike sitting on it while flat. So if it was stored long term it could have a flat spot.
If it’s a newer tire then remove it re install it you may have not set the bead correctly.
Or it could be a bad from the factory tire.
Its very clear the tire bead is not seated properly on the bead seat of the rim.
Older rims can sometimes be problematic in this sense. You should inflate the tire more until the bead actually seats. The tire will make a loud snapping or pop sound when it is seated, usually a few of these sounds. Sometimes you’ll need to physically pull the partially inflated tire up onto the bead seat.
To be sure its seated, look at the side wall. That gray stripe should be equidistance from the rim. You see how in your video that is not the case? That gray stripe hops around?
Spokes being lose/too tense can cause that.
Had the same problem. Gave it to a mechanic who started adjusting the spokes.
Its not perfect but its not as bad anymore (it still has a bit of that issue since Im doing a lot of MTB downhill where the Wheel is under loads of pressure and forces).
Take the tyre off and reseat it.
If the problem is still there then cast the tyre. Your rim isn’t wobbling (as far as I can tell) so the problem lies with the tyre.
I posted the same problem in this sub, soap and over inflating did the trick
Is that a Vittoria terreno? Thats an asshole to get seated properly!
Tire is not seated properly.