April 12, 201412 yr I've ended up with a tube in a tubeless x11 rear because the fitter couldn't get the bead on the rim without it, he doesn't know about the doughnut that I have learned since you need. The problem might be that there isn't a rim lock on the rear so is this going to work? I'm booked in for a trial tomorrow and don't want to miss it and can't really do anything about it before. Anybody got any experience with this?
April 12, 201412 yr Been using a rear tyre with tube and without rimlock for years (on a Sherco) and run normal trials pressure ( 3.5 psi) without a problem.
April 12, 201412 yr Author Just what I wanted to hear! I would best answer you if I wasn't on my phone. Cheers
April 12, 201412 yr probably more reliable than not having a tube as wont leak and the tubeless tyre once beaded wont or shouldnt come away ,, is it a michelin by any chance
April 12, 201412 yr I would have it fitted by someone who knows what they're doing, or just about anyone with a compressor.
April 12, 201412 yr Running a tube will make the sidewall feel slightly stiffer so it you dislike the feeling, you can run slightly lower air pressure. The biggest issue is heat build up IF you are running at high (for trials) speeds for long periods of time. I think that is called green-laning in UK? Heat build up is generally not a problem for normal trials use.
April 12, 201412 yr What indeed. On one of my last visits to a dealer a chap arrived to collect his trials bike from being "serviced" (the sort of thing I thought we all did at home in a spare half hour). Among the specialist tasks he had asked to be carried out was the fitting of a new spark plug.
April 13, 201412 yr x2 on t shock 250 comments and if you feel the need to run a tube and are worried about tyre rotation tearing out the valve why not just fit a rim locK?????
April 14, 201412 yr x2 on t shock 250 comments and if you feel the need to run a tube and are worried about tyre rotation tearing out the valve why not just fit a rim locK????? If you have a tubeless rim, running a rim lock would mean drilling a hole in the rim to mount it. If it is an older tube type rim, it probably already has a hole for a rim lock. If you do run a tube, be sure to NOT use a locknut on the tube valve stem. If the tire / tube do slip on the rim, it will pull on the valve stem and eventually tear the valve out of the tire. (Of course that will always happen at the point in the ride that is farthest from the truck - don't ask how I know). Without the locknut, when the tire/tube does slip, you will notice that the stem is coming out at an angle and pulling itself back inside the rim. You can easily deflate the tire, break bead and slip the tire/tube back to the correct position.
April 14, 201412 yr at the end of the day running a tube in a tubeless set up is a bodge job you can not reliably run with pressures as low as we do with tube less and for peace of mind I would not run a tube without a rimlock my trials hoj even has one on the front (tubeless rear) enduro has two rear and one front (tubed both ends) drilling a hole is no biggy and if you return to tubeless just bung an extra valve in the hole to close it
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