Bicycle tyre sidewall bulge?!?

kramdra · World Chat Champion Joined: 28 Oct 2010 Karma :

Got some new bicycle tyres today (CONTINENTAL COMFORT CONTACT 700 x 32c CITY COMMUTER ROAD) The tyre I fitted to rear wheel seems to have a bulge in sidewall. Took it off, looks ok inside. It feels perhaps a bit thinner where its bulging. The tube seems a bit big for the tyre but I doubt this could cause it?!? and the front is ok with same tube.

The bulge is perhaps 10mm diamerter and 1-2mm deep. Not very visible but immediately feel it if rotating the wheel.

They were from an ebay shop and arrived twisted / folded in half so as to be much smaller to post - wire bead type. They seem to spring back into normal shape when unpacking them, no visible damage.

Minty · World Chat Champion Joined: 23 Dec 2005 Karma :

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jeddy11 · Traffic Copper Joined: 06 Jul 2012 Karma :

Although yours sound like a good make i purchased some cheap ones from ebay and fitted both pumped them up and then within 2 days they had blown a big hole through the tube and tyres..

I complained wanting my money back they sent me 2 new tyres and 2 new tubes !! guess what ? after 2 days they were all damaged even when i under inflated them !!

Bit the bullet and paid for 2 branded tyres from halfrauds and they have been fine ever since...

Certainly a case of buy cheap buy twice Razz

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lihp · World Chat Champion Joined: 22 Sep 2010 Karma :

ninja_butler · World Chat Champion Joined: 19 Oct 2011 Karma :

Some tyres these days are folded, it's not necessarily a problem.
If you refit the tyre and the bulge is in a different place, then I would suspect the inner tube or rim rather than the tyre - check the distance from the valve hole.

Use a pair of plastic tyre levers to do the job, not spoons. My guess is you pinched the inner tube.

G · The Voice of Reason Joined: 02 Feb 2002 Karma :

Plenty are designed to be folded, though usually more expensive ones, which I'd expect you to have less problems with.

I had a similar issue with some cheap tyres on a mountain bike some years ago when I was racing - conveniently, a fellow racer who I had been helping with motorbike stuff owned a push bike shop.

He lowered the pressure, reseated the bead so it was even all the way around and pumped it up again - sorted the problem out.

sickpup · Old Timer Joined: 21 Apr 2004 Karma :

MaybeGuy · Super Spammer Joined: 12 Mar 2007 Karma :

Is it at the valve? Chances are you haven't seated it properly. I slightly inflate the tube before popping the second bead in.
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chris-red · Have you considered a TDM? Joined: 21 Sep 2005 Karma :

Another vote for deflate wiggle it all about and reseat the bead Thumbs Up

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