kelsey Posted July 23, 2010 Report Share Posted July 23, 2010 (edited) I have 2 new Dunlop D803 Tubeless tires and it seems impossible to mount these without tearing the bead.. It appears that they are just a tad undersized. Has anybody else had any isses with the D803 and getting them mounted without ruining portions of the bead area? I have installed dozens if Michelins without issues but this is my 1st Dunlop and I am struggling.. Just curious as if anybody else has had issues with this tire? Thanks Edited July 23, 2010 by Kelsey Quote Link to comment Share on other sites More sharing options...
lineaway Posted July 23, 2010 Report Share Posted July 23, 2010 Not had trouble mounting, but hard to bead up. Plus side is I`ve never had one spin, perfect if you have to run a tube. Quote Link to comment Share on other sites More sharing options...
worldtrialchamp Posted July 23, 2010 Report Share Posted July 23, 2010 The dunlops are a little bit tougher to get on (stiffer sidewall) Try leaving it out in the sunshine to warm up if you can. it will become more supple Plenty of thick soapy water around the bead also makes a big difference Quote Link to comment Share on other sites More sharing options...
hillary Posted July 23, 2010 Report Share Posted July 23, 2010 Just fitted one last night ready for the Reeth Three Day. Easy peasy. Secret is to lubricate bead with WD40, it will slip on easily, put in a tyre worm or a partly inflated MTB inner tube, inflate and it will blow out very easily. WD40 may be an unusual lubricant to use, rather than soap and water, but WD40 is water based and when it dries out, it sort of glues to tyre to the rim. Certainly they will run for a considerable distance flat without coming off the rim should you get a puncture. Quote Link to comment Share on other sites More sharing options...
zippy Posted July 23, 2010 Report Share Posted July 23, 2010 Just fitted one last night ready for the Reeth Three Day.Easy peasy. Secret is to lubricate bead with WD40, it will slip on easily, put in a tyre worm or a partly inflated MTB inner tube, inflate and it will blow out very easily. WD40 may be an unusual lubricant to use, rather than soap and water, but WD40 is water based and when it dries out, it sort of glues to tyre to the rim. Certainly they will run for a considerable distance flat without coming off the rim should you get a puncture. I don't believe that WD40 (Water Displacement formula #40) is water based, Right from the WD40 FAQ "What does WD-40 contain? While the ingredients in WD-40 are secret, we can tell you what WD-40 does NOT contain. WD-40 does not contain silicone, kerosene, water, wax, graphite, chlorofluorocarbons (CFCs), or any known cancer-causing agents." Here is the site But as far as mounting the Dunlop 803 I have had no trouble, put some straight dish soap on the bead pops right on. Get out my ratcheting tie down and just snug it down to the rim, If the tire tread area is buckling that is too far. Air it up and POP, it's on. Quote Link to comment Share on other sites More sharing options...
t-shock 250 Posted July 23, 2010 Report Share Posted July 23, 2010 Proper tyre soap always helps. Quote Link to comment Share on other sites More sharing options...
lee harris Posted July 23, 2010 Report Share Posted July 23, 2010 Just fitted one last night ready for the Reeth Three Day.Easy peasy. Secret is to lubricate bead with WD40, it will slip on easily, put in a tyre worm or a partly inflated MTB inner tube, inflate and it will blow out very easily. WD40 may be an unusual lubricant to use, rather than soap and water, but WD40 is water based and when it dries out, it sort of glues to tyre to the rim. Certainly they will run for a considerable distance flat without coming off the rim should you get a puncture. not water based. It will rot the rubber use water or soap and water Quote Link to comment Share on other sites More sharing options...
joekarter Posted July 23, 2010 Report Share Posted July 23, 2010 Yep, had the same problem as you. I "think" Dunlop may have had a batch of undersized tires make it through the inspection process. The one that did it to me was the third Dunlop I had mounted and the first that I've ever had a problem with. The retailer took it back, sent me another, and it went on no sweat. I use a tire mounting lube that I get at NAPA auto parts and it's the best $7.00 you'll ever spend. Joe Quote Link to comment Share on other sites More sharing options...
kelsey Posted July 23, 2010 Author Report Share Posted July 23, 2010 Yep, had the same problem as you. I "think" Dunlop may have had a batch of undersized tires make it through the inspection process. The one that did it to me was the third Dunlop I had mounted and the first that I've ever had a problem with. The retailer took it back, sent me another, and it went on no sweat.I use a tire mounting lube that I get at NAPA auto parts and it's the best $7.00 you'll ever spend. Joe Thanks Guys.. Just to be clear.. it is not the seating of the bead, once it is mounted, that I am having issues with. It is actually installing the tire on the rim without damaging the bead area... It seems the ones I have are just a tad undersized and are near impossible to get on the rim without bead damage.. Once on, they will seat up fine, but, of course, they leak at low pressures, because the bead is damaged. Quote Link to comment Share on other sites More sharing options...
joekarter Posted July 23, 2010 Report Share Posted July 23, 2010 That's what mine did as well. It actually ripped chucks of the rubber off right in the area where the bead meets the rim. And in my case is was PLENTY warm (it's always plenty warm here ), and had LOTS of lube on it. You might want to contact the folks you bought it from and see if they are willing to contact Dunlop about taking it back. Not only would it help you out, it might help Dunlop figure out if they have a problem. Joe Quote Link to comment Share on other sites More sharing options...
kelsey Posted July 23, 2010 Author Report Share Posted July 23, 2010 I just called Dunlop Tire's Claims dept. to ASK if there have beenany issues on their end. They, rudely, told me that there are no issues withthe tire and that I am the only one who has ever called in regarding this.. So, I guess it is back to Michelin Tires for me.. Wasted 2 Dunlops trying to install them. The Michelins go right on.. I would suggest that everybody think twice about the Dunlop tire. Quote Link to comment Share on other sites More sharing options...
motovintage Posted July 23, 2010 Report Share Posted July 23, 2010 ???hmmmm... mine went right on, no problem getting the bead to seat, no different than a mich or IRC. if you are tearing the bead you are using the wrong tool, technique, or lubrication. is it possible your wheel does not have a deep enough drop center? My Montesa rim has plenty of drop center, not sure, but I was thinking some of the manufacturers use some kind of old fashion sealing band over the spoke nipples, maybe that is creating a clearance problem?? Quote Link to comment Share on other sites More sharing options...
steve Posted July 23, 2010 Report Share Posted July 23, 2010 ???hmmmm... mine went right on, no problem getting the bead to seat, no different than a mich or IRC. if you are tearing the bead you are using the wrong tool, technique, or lubrication. is it possible your wheel does not have a deep enough drop center? My Montesa rim has plenty of drop center, not sure, but I was thinking some of the manufacturers use some kind of old fashion sealing band over the spoke nipples, maybe that is creating a clearance problem?? Very good point. In order to ensure the tyre goes on with no damage always pay attention to the opposite side and make sure it is pushed right into the 'drop centre'. Buy some decent soap and never use tyre levers for fitting - if you can't get it on without then you're not doing it correctly. I use a wheel holder that I made to hold the rim steady and above the floor clear of disc or sprocket. It also has a bead breaker built in which could be used to assist in fitting. I prefer to stick my big work boots on or even Trials boots and stand on the tyre. Soon pops over even with cold stiff old tyres. I've never fitted a Dunlop but I pretty sure that if the tyre will seat then there's no way it's undersize. Quote Link to comment Share on other sites More sharing options...
pistonbroke Posted July 23, 2010 Report Share Posted July 23, 2010 neither WD40 or soap and water should be used to mount a tyre . WD40 because its an oil and will rot the rubber and soap has salt in it and will also rot the rubber . Tyre bead soap should be used , but as an alternative , spray furniture polish ( Mr Sheen etc.) is quite good and also a tyre should go on without the use of levers . When I was a tyre fitter , we used to put tyres on earth movers with a 28lb sledgehammer !!! Phil Quote Link to comment Share on other sites More sharing options...
kelsey Posted July 23, 2010 Author Report Share Posted July 23, 2010 I have installed countless tires and am confident in my method.. Like I said, the IRC and Michelins go on this rim just fine without issues.. it is only the Dunlop that is causing me grief.. same method used with all of them Quote Link to comment Share on other sites More sharing options...
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