scot taco Posted January 1, 2015 Report Share Posted January 1, 2015 Just wondering what everyone is using for a rear tire on there TY250a.I,ve read that the IRC tubeless,which is what I wanted to use, will not stay on the bead very well.How about the IRC tube type? Quote Link to comment Share on other sites More sharing options...
lineaway Posted January 1, 2015 Report Share Posted January 1, 2015 (edited) Well if you are using a tube there is no issues. But the tube type is the correct one to use. Edited January 1, 2015 by lineaway Quote Link to comment Share on other sites More sharing options...
bashplate Posted January 2, 2015 Report Share Posted January 2, 2015 I might have got this the wrong way round....but thought the IRC's were quite soft on the side walls, so would stand a bit more (2-3psi) in the tube, which will also help keep them on the rim. Quote Link to comment Share on other sites More sharing options...
wakka Posted January 2, 2015 Report Share Posted January 2, 2015 Quote Link to comment Share on other sites More sharing options...
totalshell Posted January 2, 2015 Report Share Posted January 2, 2015 the irc has very soft sidewall to the point hwere on the road or trail they feel like riding on a flat tyre.. Quote Link to comment Share on other sites More sharing options...
nelly1 Posted January 2, 2015 Report Share Posted January 2, 2015 i love em 3 Quote Link to comment Share on other sites More sharing options...
scot taco Posted January 3, 2015 Author Report Share Posted January 3, 2015 Thanks to everyone for the replies. 1 Quote Link to comment Share on other sites More sharing options...
woody Posted January 3, 2015 Report Share Posted January 3, 2015 (edited) the irc has very soft sidewall to the point hwere on the road or trail they feel like riding on a flat tyre.. That's the tube type, they've been the same since they were introduced. They're inconsistent and some are better than others but generally they are too soft. For lighter riders it's not so noticeable as they don't load the sidewall so much but once you're over, say around 11 - 12 stones, it becomes noticeable. Especially when the weather is warm. The tubeless IRC has a different sidewall which is stiffer, although I've had a couple which have been too soft in recent times and rolled too much, but that's in over 20 years of using them. The tubeless work fine with a tube on Akront rims but I've never been able to get any tubeless tyre to hold on Japanese rims, they generally drop into the well when the pressure drops below 10psi. I guess altering the profile of the bead of the tyre could get around that, to make it the same as a tube type but I've never tried it. Edited January 3, 2015 by woody Quote Link to comment Share on other sites More sharing options...
scot taco Posted January 4, 2015 Author Report Share Posted January 4, 2015 Thanks Woody.I see that you said the samething in an earlier post so I am sorry for you having to repeat it.From what I can tell by looking around at tire prices the only true tube type is the IRC.I saw one add for a Michelin tube type,clicked on it and it said they were discontinued.The other adds I saw for Michelins said they would work tubed or tubeless depending on the rim. I,m pretty sure the Dunlop 803 and Pirelli mt43 adds said tubeless only so unless I missed some (quite possible) the only true tubed type trials tire is the IRC. If that is the case it seems like the only one to trust the bead staying where it should on the TY. Quote Link to comment Share on other sites More sharing options...
woody Posted January 4, 2015 Report Share Posted January 4, 2015 Yes it's the only tube type worth using, but the sidewalls are soft and the tyre can roll on cambers and rocks. Depends on your weight, the temperature, pressure etc. If you run at 6psi it helps stop it rolling but grip will suffer at that pressure, depending on what you're riding on. The Michelin tubed was useless as it was no longer a tubed version of the X11 You can use the tublis system to keep a tubeless tyre on a rim. I used it on a KT250, which, like the Yam, won't hold a tubeless tyre on it's rim. If you can find someone to show you how to modify the bead of a tubeless tyre to the same profile as a tubed type, that's another solution. I've never done it so can't help. Quote Link to comment Share on other sites More sharing options...
bashplate Posted January 5, 2015 Report Share Posted January 5, 2015 I'm realy intriqued how you can modify a tubless bead to work on a tubed (DID) rim. Quote Link to comment Share on other sites More sharing options...
scot taco Posted January 5, 2015 Author Report Share Posted January 5, 2015 Thanks again Woody.I will look into the tubliss system,but for the type of terrain that most of my riding will be on the IRC might do. Quote Link to comment Share on other sites More sharing options...
b40rt Posted January 5, 2015 Report Share Posted January 5, 2015 Thanks again Woody.I will look into the tubliss system,but for the type of terrain that most of my riding will be on the IRC might do. Tube type IRC, (TR 011) is an excellent tyre. As said a bit more air than other makes usually. Quote Link to comment Share on other sites More sharing options...
woody Posted January 5, 2015 Report Share Posted January 5, 2015 Yes and no Ross. The grip factor is excellent, just as good as the tubeless. The sidewalls let it down. I have had one or two where the sidewalls were stiffer from new but softened with use, but 95% have been too soft from new. I tried one recently in my Ossa when out running in the bike and could not do a cambered section, the rear tyre rolled down the camber and turned the bike around every time. Swapped the wheel for my tubeless one and section cleaned no problem. If you ride solely on rocks and can afford to run a little more psi than normal, say 5 - 6psi, it goes someway to negating the soft sidewall. If you ride mainly mud, cambers, roots etc, then 5 - 6psi is no use, there isn't enough contact patch for maximum grip. With the tyre at normal pressure of 3 - 4psi the sidewalls give and the tyre rolls on the sidewall on cambers, over the points of rocks. I've even had them roll under hard throttle on flat ground in a straight line when going at steps etc. which rear wheel steers the bike offline. It's not so noticeable for lighter riders and it's not so noticeable if sections are fairly straightforward and on the easy side where grip isn't paramount. So depending on how someone rides and the level at which they ride at, it can make a difference I guess. But once section severity increases and grip is at a premium requiring the lowest pressure, the sidewalls cause problems. Don't know why they don't give them the same construction as the tubeless, It can't be that difficult... . 1 Quote Link to comment Share on other sites More sharing options...
motovita Posted January 5, 2015 Report Share Posted January 5, 2015 I use Michelin X-11 on my TY250 without any problems. I over inflate the tire to 20PSI or so when the bike will be stored for any length of time to make sure ii is fully seated on the rim. I use 4-6 PSI when riding. Here in the USA the IRC tires are quite expensive, so it's not that more to use a Michelin, and the Michelin has always lasted longer than the IRC (either tubeless or tube type) for me. Quote Link to comment Share on other sites More sharing options...
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