Author Topic: Tire bead question (Read 11392 times)

Semper-guzzi · « **on:** January 03, 2015, 01:41:08 PM »

When mounting the tube type tires like on, let's say, a Jackal, will I hear the bead pop on? I filled it up with about 45 psi, no air escaping (yay no pinched tube) but I didn't hear the bead pop on. Does it only do that on tubeless or tube type as well?

Doug McLaren · « **Reply #1 on:** January 03, 2015, 02:02:23 PM »

Although I've always heard tubeless tyres go "pop" when I've put them on. I've only heard tube type do that maybe once or twice. They seem to slide into position. I always make sure to check that they have seated fully by looking at the line near the bead and ensuring it's the same distance from the rim edge all the way round.

Semper-guzzi · « **Reply #2 on:** January 03, 2015, 02:05:45 PM »

Thanks Doug. I deflated it, and pushed all around on each side. It felt as if it was on.

charlie b · « **Reply #3 on:** January 03, 2015, 02:58:42 PM »

When installing tubeless tires on mine they rarely 'pop'. It depends on the tire, rim, lube, and how much pressure it takes to make the tire seat. Most of the time I get the bead to seat between 20 and 30 psi. Every now and then I get a stubborn one (like the last rear tire I put on) that is hard to seal and is hard to get the bead to set (40psi that time, and it did pop). Probably cause I cleaned the rim much better than I usually do :)

Semper-guzzi · « **Reply #4 on:** January 03, 2015, 03:16:53 PM »

Thanks guys. Just wanted to make sure I was ok.

charlie b · « **Reply #5 on:** January 03, 2015, 04:50:00 PM »

FWIW, the key is to look at that little mould line around the tire and make sure it is even with the rim all the way around on both sides. If it is, you should be fine.

Wayne Orwig · « **Reply #6 on:** January 03, 2015, 06:47:57 PM »

Quote from: charlie b on January 03, 2015, 04:50:00 PM

FWIW, the key is to look at that little mould line around the tire and make sure it is even with the rim all the way around on both sides. If it is, you should be fine.

^^^^^^^^^
This.

Often, cast rims, even tube ones, have a casting lip that the tire will 'pop' over. Or not.
Most steel rims won't have the lip to 'pop' over.

Semper-guzzi · « **Reply #7 on:** January 03, 2015, 07:57:53 PM »

I see the line. It's even all the way around on both sides. seems to be holding air. If I pinched the tube it would surely be deflated by now right?

pyoungbl · « **Reply #8 on:** January 04, 2015, 01:15:30 PM »

Funny that this would come up now. I'm having a problem getting the bead to seat with a new tire. Here are the details: new tire is 130/80-17, just like the old one (OEM, on a '13 V7 Special). The tube is a new heavy duty one rated for rims 4.50 ~ 5.11 and that's the size recommended by at least one tube size chart I have seen. The tire, rim, and tube are all 17". I get all but about 5" of the bead seated on each size. So far I have unseated the bead all around, twice; applied lots of lube to the tire and rim; pumped the tire up to 60PSI. Still no joy. Oh, and it's 73F today so I do not think this is a cold tire problem. Any suggestions are appreciated.

Peter Y.

PS, I should be out riding...not messing with this damn tire.

charlie b · « **Reply #9 on:** January 04, 2015, 03:39:19 PM »

Any chance the rim is 'rough' at that point?

Have you tried getting it to seat in that spot first, then the other side (yes, this is easier said than done)?

pyoungbl · « **Reply #10 on:** January 04, 2015, 04:12:14 PM »

Charlie, the rim is fairly new ('13) and in great condition...no roughness that I can detect. I went back to the wheel after letting it sit for a few hours and found that the bead has now set completely on one side and about 95% on the other side. The side that is not 100% also does not show a consistent gap between the tire line and the rim. I'm going to leave the wheel/tire in a warm spot overnight, then mount it and ride slowly around the block a few times. If that does not get this tire settled I'll have to go to plan B...whatever that is. Thanks for trying to help me solve this problem.

Peter Y.

Semper-guzzi · « **Reply #11 on:** January 04, 2015, 09:01:55 PM »

Ratchet strap around the circumference of the tire while filling it up slowly? I'm not a pro, and if it sounds dumb it might be because I have no experience. It's just what I would try.

Mike Tashjian · « **Reply #12 on:** January 05, 2015, 10:19:03 AM »

The ratchet strap is a great tool if the tire is not contacting the bead as you try to put air into a tubeless tire. As soon as the beads seal you should remove the strap so it can't break and maybe hurt you. Mike

mtiberio · « **Reply #13 on:** January 05, 2015, 12:38:41 PM »

look for the bead seating rib. a line cast into the rubber that should be about 1/8" outside the rims all the way around the tire. if it dives under the wheel at any point you are not seated...

pyoungbl · « **Reply #14 on:** January 05, 2015, 01:16:48 PM »

The bead seating rib is exactly what I am worried about. Although the tire is making full contact with the rim the rib is diving under the edge of the rim for a few inches.

Peter Y.

bigbikerrick · « **Reply #15 on:** January 05, 2015, 02:05:59 PM »

I would air it up to 45-50 psi, then if that doesnt do it, take the bike for a slow ride around the block. Ive had them do that, and and it has always gotten the tire to seat properly. I have also deflated the tire, pushed the bead down, spray some rubber lube between the tire, and bead, then reinflate to 45-50 psi.
It scares me to inflate higher than 50 psi., and dont recommend it. Good Luck.
Rick

mtiberio · « **Reply #16 on:** January 05, 2015, 02:36:40 PM »

rebreak the bead, and lube the crap out of it, then pump it up to about xxx (yes, 3 digits, have some ear protection in place)... it will seat. Sometimes if it is a tube tire, and you have trapped the tube between the tire and rim you need to clear this as the tube will lift the tire off the rim at that spot, making seating 180 degrees away impossible. If so, deflate, break bead, then inflate to about 5 pounds. drop the wheel onto the tire all the way around (pick it up drop it, rotate, drop it, etc). Then try inflating it again.

malik · « **Reply #17 on:** January 07, 2015, 10:22:10 PM »

All good advice. I do my own changes (tubed tyres on the V7 and the Enfields), and often they pop, but sometimes they ooze on. I have taken the pressure up as far as 100psi, then bounced it. If that doesn't work, I release the pressure, re-lube the tyre & rim, & inflate again. Once, I seem to remember, it took 3 goes. That little line on the tyre should run parallel to the rim. Just about to do another rear tyre. I'm encouraged to see you checked the tube size. I douse my tubes with a film of talc, and inflate a little to avoid pinching it, before setting the tyre on. We get better at it with practice. If things aren't going smoothly, a rest & a cup of tea (or other recreational beverage) often works wonders.

Mal

Semper-guzzi · « **Reply #18 on:** January 07, 2015, 10:30:09 PM »

I heard my rear tire bead pop on a few times. Not loud but distinguishable. The front more or less slid right on.
On a side note, so far so good with the Shinkos I installed. The Jackal seams to just fall into a turn now. But it could just be that the old tire was squared and crappy.

malik · « **Reply #19 on:** January 14, 2015, 02:29:17 AM »

Maybe not. I put a Shinko 120/60 on the 1100 Sport in NZ (instead of the usual 120/70) and it seemed to turn in sharper as well, as one would expect.

Mal

malik · « **Reply #20 on:** January 20, 2015, 04:17:01 PM »

Have just put another rear tyre (Avon AM26) on the V7C. The bead popped at 26 psi this time. I did use a little soap on the bead & rim.-
The previous Avon lasted 19,000k, with still a little tread in the centre & some scalloping on the side treads.

Mal--

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Author Topic: Tire bead question (Read 11392 times)