thesaint Posted October 1, 2018 Report Share Posted October 1, 2018 (edited) The rear tire on one og my bikes is leaking out all og the air within a few hours. The tire size is 4.00 R18 so what do you think of putting a inner tube in the tire? I read that tube size 110/90-18, 110 /100-18 and 120/100-18 will fit the 4.00- R18 rear tire. Any knows if this is correct? Link to ebay where they say the tube fit the dim above: https://www.ebay.co.uk/itm/NEW-ULTRA-HEAVY-DUTY-4mm-INNER-TUBE-MX-MOTOCROSS-OFF-ROAD-110-100-18-120-100-18/291402295585?hash=item43d8ee2921:g:KhwAAOSwZjJU~XGd Edited October 1, 2018 by thesaint Quote Link to comment Share on other sites More sharing options...
jonnyc21 Posted October 1, 2018 Report Share Posted October 1, 2018 (edited) I would see if you can correctly solve the problem and keep it tube less. The low pressures in trials with a tube will likely have you getting pinch flats frequently with a tube and will also need a rim lock witch would require drilling a second hole in the rim if you do that to prevent the tire from rotating and tearing the valve stem out. good luck making your decision. Edited October 1, 2018 by jonnyc21 Quote Link to comment Share on other sites More sharing options...
thesaint Posted October 1, 2018 Author Report Share Posted October 1, 2018 (edited) The leak is on my 2005 Gas Gas TXT 125 Pro i can off course take off the rim flap (see the red arrow on the drawing from the parts manual below) and clean the the "groove" in the rim where the rim flap sits and also clean the sides on the rear rim and hope that this will fix the leak I suppose that this is the best way to fix the leak, Never had any problem with the tires leaking air on my 2006 Gas Gas TXT 250 Pro and or my 1998 Gas Gas TX 321 Contact there are no problems with any leaks on the wheels at all Edited October 1, 2018 by thesaint 1 Quote Link to comment Share on other sites More sharing options...
cleanorbust Posted October 1, 2018 Report Share Posted October 1, 2018 I've run tubes on tubeless rims on my last couple of bikes, spanning a period of some 7/8 years. No rim lock used, no tyre creep experienced, no problems. Generally run 3.5 psi. Last bike I bought had normal tubeless set-up and I am unable to tell the difference from a riding point of view. 4 Quote Link to comment Share on other sites More sharing options...
2stroke4stroke Posted October 1, 2018 Report Share Posted October 1, 2018 (edited) No need for a security bolt - the air does not know it is in a tube (which conforms to the internal shape of the tyre and rim) and exerts the same pressure on the carcass as it would without the tube. If the tyre grips the rim tubeless then it will grip just as well with a tube if correctly seated. I ran a Beta for long enough with a tube and there was no creep. Clearly a tube could pinch puncture more easily than a tubeless tyre but, in reality, it does not seem to be a problem. I've never tried the experiment but if a tube so punctured within a slow leaking tubeless tyre would not you just end up with a slow leaking tubeless tyre with an empty tube in it as the tyre would retain the released air? However, I'm prepared to believe that a small handful of riders from the world of trials could, in a blind test, tell if a tubeless tyre had a tube in it from the performance viewpoint. They all have technicians to sort leaky rims though. Edited October 1, 2018 by 2stroke4stroke 1 Quote Link to comment Share on other sites More sharing options...
jonnyc21 Posted October 1, 2018 Report Share Posted October 1, 2018 FYI: I have seen a rear tire shift on a trials bike at 3.5 psi and would have taken the valve stem off with the amount of shift. I think it was an older Dunlop 803 but don't remember for sure as it was some time ago so not impossible for it to happen, though I admit I have only ever seen it once. Quote Link to comment Share on other sites More sharing options...
oni nou Posted October 1, 2018 Report Share Posted October 1, 2018 A 120/100X18 is the metric equivalent of a 4.00 X18 tyre............ tyres and rims that are designed to be tubeless are pointless.the designers were just saving money by not having to include a tube.....a tube fitted in a tubeless tyre set up is much better;you should definitely fit one it is the best upgrade you could have....by the way your rim is not a standard GasGas rim it has come off a Beta a Sherco or Xispa although it is the same as the standard rim that would have been anodised silver like your front rim 1 Quote Link to comment Share on other sites More sharing options...
totty79 Posted October 1, 2018 Report Share Posted October 1, 2018 I've ripped a tube stem off due to a tyre rotating at 4psi, but it was a cheap vee rubber tyre. I'd just bought the bike and didn't know it had a tube fitted. Quote Link to comment Share on other sites More sharing options...
lineaway Posted October 2, 2018 Report Share Posted October 2, 2018 I would put tire sealant in before going to a tube. 2 Quote Link to comment Share on other sites More sharing options...
biffsgasgas Posted October 2, 2018 Report Share Posted October 2, 2018 Most of the time if you are leaking at the rim strip its because the spokes underneath are loose causing it to move that rim strip. Check your spoke and make sure you have no corrosion issues in the spoke area. --Biff Quote Link to comment Share on other sites More sharing options...
cascao Posted October 2, 2018 Report Share Posted October 2, 2018 Had used tube in my old 2010 sherco without any problem Quote Link to comment Share on other sites More sharing options...
thesaint Posted October 4, 2018 Author Report Share Posted October 4, 2018 If i am not using a tube i wil rather carefully take off the rim flap and clean it with soapy water. First i will use a steel or brass brush to clean the sides of the rim and where the trim flap sits and so clean everything with soapy water If i do not use a inner tube But i guess if i clean the rim flap and rim the wheel will hold air Quote Link to comment Share on other sites More sharing options...
nigel dabster Posted October 6, 2018 Report Share Posted October 6, 2018 On 01/10/2018 at 2:25 PM, thesaint said: The rear tire on one og my bikes is leaking out all og the air within a few hours. The tire size is 4.00 R18 so what do you think of putting a inner tube in the tire? I read that tube size 110/90-18, 110 /100-18 and 120/100-18 will fit the 4.00- R18 rear tire. Any knows if this is correct? Link to ebay where they say the tube fit the dim above: https://www.ebay.co.uk/itm/NEW-ULTRA-HEAVY-DUTY-4mm-INNER-TUBE-MX-MOTOCROSS-OFF-ROAD-110-100-18-120-100-18/291402295585?hash=item43d8ee2921:g:KhwAAOSwZjJU~XGd A tube is an easy and quick solution that will do the trick. You will lose a little bit of grip but unless you are riding in serious competitions it probably wont notice that much. Quote Link to comment Share on other sites More sharing options...
nigel dabster Posted October 6, 2018 Report Share Posted October 6, 2018 (edited) On 01/10/2018 at 9:57 PM, oni nou said: A 120/100X18 is the metric equivalent of a 4.00 X18 tyre............ tyres and rims that are designed to be tubeless are pointless.the designers were just saving money by not having to include a tube.....a tube fitted in a tubeless tyre set up is much better;you should definitely fit one it is the best upgrade you could have....by the way your rim is not a standard GasGas rim it has come off a Beta a Sherco or Xispa although it is the same as the standard rim that would have been anodised silver like your front rim Complete rubbish, again. Didnt you say on another thread tapes were easy to fit??? Tubeless tyres have many benefits for the rider. A tube type tyre is a pain to fit, a total nightmare out in a competition to mend (saw a couple of lads trying to do it near Blackwater last week in rain and cold) and always needs constant maintenance. Grip is less with a tubed tubeless. Off a Xispa? very unlikely were any even in Northern europe? Edited October 6, 2018 by nigel dabster Quote Link to comment Share on other sites More sharing options...
nigel dabster Posted October 6, 2018 Report Share Posted October 6, 2018 It is possible to replace rim tape and do a proper job but the modern integrated tapes are very tricky to seal. Quote Link to comment Share on other sites More sharing options...
.thumb.jpg.959a058f27f115810079be4fec95cb91.jpg){kind=avatar}
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.