Please help gang, this is driving me nuts. Been working on a lil refurb of this 1995 Trek Multitrack and the end is in sight. I throw on some nice new Gravel Kings and notice this hop while it’s in the stand.
Rim appears to true and round with no flat spots. Appears to lesser degree with a different tire. Spokes and rim tape seem fine. Tested a different tube to no avail. What is the issue? Weird casing, wonky tire? 🤔
Thanks so much!
Gravel King tire out-of-round? Noticeable wobble/hop driving me nuts
byu/wunderball inbikewrench
by wunderball
9 Comments
Not seated correctly. let all the air out, put soapy water between it and the rim, pump up as high as you dare, leave to dry. Then later on let it down to regular riding pressure.
Like someone else said, it’s not seated fully.
Check the rim strip it’s most likely not seated correctly and wrinkled. Cheap rim strip is constant pain. I recommend installing tubeless tape even if you use tubes, it ain’t going nowhere. Damn even properly installed electric tape is a viable alternative. Degrease the rim put a couple layers of electric then cut some gorilla tape to size to fix it in place where the valve hole is. GL!
That’s the tire not the rim from the looks of it
Pump to maximum pressure or abit over and leave it
Bead is not seated in the rim properly.
Try getting a 2finger wide paint brush, a solution of 50:50 water and washing up liquid and painting the inside of the rim and the outside of the tire liberally before refitting the tire to the rim. Then quickly inflate to 50% over the psi limit of the tire. Probably around 100psi or so. It should audibly ‘pop’ as you inflate. Then let some air out again.
This might work.
Other times, somehow some rims just dont like the bigger folding tires over the narrower tires they came with from the manufacturrer.
let the air out, fill it up again
Wet the bead with soapy water and pump it to 80 psi, that hop usually snaps right out.
Rim looks goog. Remove the tire and reseat it. I used to hate to fix flats because I could never thet that tire perfect. Though after lots of tries it became easy to seat them. I also use a little spray bottle with water and dish soap sprayed around the bead. Using low pressure and building up while massaging the tire. You will get the hang of it. From time to time you wil have a tire also that – needs to be replaced. good luck.