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Help please!(9 posts)

Help please!look271
Sep 30, 2002 4:11 PM
I have a mid 80's (I think) Nishiki w/ Arrayo wheels. I had to replace the rear tire and used an almost new one that I had lying around. The friggin thing popped off the rim. I thought maybe it was a bad tire, so I put on another tire (kevlar bead Specialized) and it did the same thing. Is it that those older wheels had a different hook style or do I just have a bad rim? (Other possibility is that I'm an idiot and don't know how to mount a tire, but after doing this for over 10 yrs, I think that that is out of the realm of possibilities......)
Thanks for any insight!
re: Help please!desmo
Sep 30, 2002 4:48 PM
are you sure the rims are 700c?
Yep. Just in case, I checked.look271
Sep 30, 2002 5:25 PM
You'd have the opposite problem if they were 27'; it's slightly bigger than 700c, so you'd have a b*&ch of a time getting them on.
Are both tires Kevlar bead?Dave Hickey
Sep 30, 2002 5:32 PM
You might want to try wire bead. I've had some rims that wouldn't hold a kevlar(expecially Specialized)tires.
Nope.look271
Oct 1, 2002 6:30 AM
1st one was wire. It held for a while, though. It was old and the wire might have beee deformed. I'm going to look at it and put another wire beaded tire on. Could it be possible that the increased air pressure of these 2 tires could have done it? They were both rated @ 115 psi and the previous tires were 100psi.
Wide or narrow rims?Straightblock
Oct 1, 2002 3:46 PM
Some of the old wider Araya rims had straight beads with no hook. I've still got one built up on an old fixed gear wheel. They were ok for the 85 psi townie tires of that era but are marginal for today's narrower, higher pressure hook-bead tires. You've really got to take care making sure the bead is seated perfectly, and anything narrower than 28 mm is an odd fit.
Narrow.look271
Oct 2, 2002 6:21 AM
They had 25c mounted on them originally, and that's what I put on (at least the wire beaded tire.) I think that it was just a combo of a bad bead on the wire tire and a bad fit (the specialized). Hope so. I don't want to blow any more tubes!
Ditto what Straightblock said--had the same prob w/ArayasSilverback
Oct 2, 2002 7:33 AM
My wife's old Bridgestone came with Arayas, too. When she was riding a lot (late '80s/early '90s), we never had problems. Lately she's abandoned horses and mountain bikes and started road riding again, so I tuned it up and put new tires on it. They popped off four or five times. I finally bought some wire-bead Performance cheapies in 28mm, mounted them very carefully (though I don't think that was the trouble), and they've held at 95 psi for a couple of months.
I had the opposite problem recently ...Humma Hah
Oct 7, 2002 4:18 PM
The "700c" wheel I got used would not mount a 700c tire. A 27" popped right on. Sounds very much like a 27" tire on a 700c rim. But I'd think the tire would be so marked.

Get on Sheldon Brown's website and find his table of rim sizes. Possibly you've got some wierd slightly undersized rim. There are a zillion wierd sizes out there, and a lot of them were last seen in the '80's.