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Schwalbe 28C Marathon Plus tyres won't fit my 28C rims

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Schwalbe 28C Marathon Plus tyres won't fit my 28C rims

Old 06-09-17, 02:48 AM
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Touriste
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Schwalbe 28C Marathon Plus tyres won't fit my 28C rims

Hi everyone, I have an Orbit Harrier tourer with Alesa 622 x 17 rims. It's currently fitted with Schwalbe 700 x 28C tyres, so I ordered some Schwalbe 700 x 28C Marathon Plus as replacements. I can't get them on the rims (the bead keeps popping out) and they look bigger than the existing tyres. Do I have to try harder, or is there an incompatibility here?
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Old 06-09-17, 04:38 AM
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Manufacturing defect, maybe? FWIW, some of my rim+tire combinations are a sloppy and loose fit until I get air pumped into them. I have to pay a little extra attention to the bead seat line and keeping the tires centered as I begin to inflate.

You do have hooked rims, right? You're not possibly riding some older bike without them?
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Old 06-09-17, 04:51 AM
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What happens when you inflate them? Do they fit then?
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Old 06-09-17, 05:33 AM
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Marathon Plus tires are pretty thick and stiff across the tread width, and this is a common problem.
You get the left bead on the rim, and while you're trying to get the right bead on, the left one falls off the other side.

This is probably your issue. It is extremely unlikely that the tire beads were made the wrong size. If they were, the area around the beads would show that it wasn't molded properly at all.

One thing you can try is to put the tube inside the tire, and then wrap 8 turns of masking tape around the tire (like, wrap loops of tape around the tire+tube at 8 evenly spaced intervals) and then try and mount and inflate the tire like that. The tape holds the beads together during mounting and the tape just rips with inflation. You just peel off what's sticking out and the tape bits left inside won't hurt anything.

After they've been mounted a while this problem goes away.
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Old 06-09-17, 06:07 AM
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Originally Posted by Doug5150 View Post
One thing you can try is to put the tube inside the tire, and then wrap 8 turns of masking tape around the tire (like, wrap loops of tape around the tire+tube at 8 evenly spaced intervals) and then try and mount and inflate the tire like that. The tape holds the beads together during mounting and the tape just rips with inflation. You just peel off what's sticking out and the tape bits left inside won't hurt anything.
What an interesting idea! I like it. This will be a great trick to pull from the proverbial hat someday should I ever encounter a situation like the OP's.
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Old 06-09-17, 07:47 AM
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Old 06-09-17, 07:48 AM
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I have Marathon Plus' on two of my bikes, they can be a pain to mount. I found that I can get them on pretty easy now by wearing mechanics gloves, and inflating the tube just enough so it won't fold over itself. The trick seems to be when you have just about 8 inches of bead to go, let the air out of the tube and pinch the tire on the opposite side and get the bead set into the channel of the rim. This give you just enough "slack" to be able to roll over the last bit of bead and get it set. I've never used tire levers, or any other tool to mount them, it just takes some patience and some grunt.
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Old 06-09-17, 08:28 AM
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Guys, half of you are reading the OP wrong. The beads keep POPPING OFF. He can put them on the rim just fine.
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Old 06-09-17, 09:43 AM
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The only way I could get them on. Bike Tools Etc. - 1000's of bicycle tools and parts for the home mechanic!
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Old 06-09-17, 09:46 AM
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What @corrado33 says.
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Old 06-10-17, 10:37 AM
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Originally Posted by 3alarmer View Post

I would have loved doing that in the rain.
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Old 06-10-17, 11:30 AM
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.
...once they've been mounted, inflated to pressure, and ridden for a while, they seem to be less problematic to remount. My experience, anyway. Maybe you just get used to them. I've never actually flatted one on the road. Maybe I would call Triple A.
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Old 06-11-17, 04:21 AM
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As you say they look bigger than the old tires, please look and confirm that on the side of the new tires it is marked "622-28" and not "635-28"
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Old 06-12-17, 07:30 AM
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Originally Posted by jimc101 View Post
What happens when you inflate them? Do they fit then?
I haven't tried yet because I can't get them on the rim. When I put the bead in one side, the other side pops out.
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Old 06-12-17, 07:37 AM
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Originally Posted by JonathanGennick View Post
Manufacturing defect, maybe? FWIW, some of my rim+tire combinations are a sloppy and loose fit until I get air pumped into them. I have to pay a little extra attention to the bead seat line and keeping the tires centered as I begin to inflate.

You do have hooked rims, right? You're not possibly riding some older bike without them?
I guess so (don't have the bike with me right now). It's about 10 years old.
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Old 06-12-17, 07:47 AM
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Originally Posted by Doug5150 View Post
Marathon Plus tires are pretty thick and stiff across the tread width, and this is a common problem.
You get the left bead on the rim, and while you're trying to get the right bead on, the left one falls off the other side.

This is probably your issue. It is extremely unlikely that the tire beads were made the wrong size. If they were, the area around the beads would show that it wasn't molded properly at all.

One thing you can try is to put the tube inside the tire, and then wrap 8 turns of masking tape around the tire (like, wrap loops of tape around the tire+tube at 8 evenly spaced intervals) and then try and mount and inflate the tire like that. The tape holds the beads together during mounting and the tape just rips with inflation. You just peel off what's sticking out and the tape bits left inside won't hurt anything.

After they've been mounted a while this problem goes away.
Thanks for your reply. This is exactly my problem (yes, that's what I meant by 'popping out'). I'll try your trick when I get home.
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Old 06-12-17, 08:03 AM
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Originally Posted by 3alarmer View Post
What a pleasant speaking voice. And an encouraging, helpful video. The Bob Ross of bike maintenance!
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