shawn Posted July 22, 2009 Posted July 22, 2009 HI GUYSI WAS WONDERING IF IT WAS ADVISABLE TO PUT PERMA TUBES (THE SOLID ONE"S) ON A MOUNTAIN BIKE, I REALISE THERE IS A WEIGHT ISSUE. I FIGURED THAT IF I PUT SLIME INTO A TUBE THE WEIGHT IS ALMOST THE SAME AS A PERMA TUBE.CAN ANYONE ENLIGHTEN ME.WHAT ARE THE PRO'S AND CON"S ???? THANKS SO MUCH
TNT1 Posted July 22, 2009 Posted July 22, 2009 you will have difficulty adjusting tyre pressure to suit conditions/riding style?
rad006 Posted July 22, 2009 Posted July 22, 2009 Not a clever Idea its like riding with Bricks for wheels...They are so hard you will break your bones....For road use now that is a different story
WorcesterWheelers Posted July 22, 2009 Posted July 22, 2009 It's a DEFINATE NO NO!!! Permatubes are fine for little kiddies bikes, but in general they have several negatives:1. Very heavier than tyre liners & sealant2. They stuff up your tyres much faster, i.e. the tread does not last3. They mess up your rear derrailleur (jockey)4. Due to the fact that they are very difficult to fit or remove, you run the risk of damaging your rims. So tyre liners & sealant (various products available) are a MUCH better AND cheaper option. Of course the ultimate is doing a tubeless conversion, It might be a large innitial $$$$ outlay, but in the long run by far the least effrot / problems / punctures WorcesterWheelers2009-07-22 03:30:06
Wernervdmerwe Posted July 22, 2009 Posted July 22, 2009 How do they damage your d?railleur though? RustyHWR 1
WorcesterWheelers Posted July 22, 2009 Posted July 22, 2009 How do they damage your d?railleur though? I'm not 100% sure why, but I'll ask my mechanic and get him to explain it to me, all I know is that quite often when we get customers in with cheaper bikes that have been using permatubes the rear der. is badly bent. Most probably because of the extra strain to rotate the extra weight of the much heavier wheel. May JB can help here?
TNT1 Posted July 22, 2009 Posted July 22, 2009 How do they damage your d?railleur though? I'm not 100% sure why' date=' but I'll ask my mechanic and get him to explain it to me, all I know is that quite often when we get customers in with cheaper bikes that have been using permatubes the rear der. is badly bent. Most probably because of the extra strain to rotate the extra weight of the much heavier wheel. May JB can help here?[/quote'] I reckon it's pure coincidence...
Christopher Brunsdon Posted July 22, 2009 Posted July 22, 2009 I've got slime in my tubes and its no where near the weight of perma-tubes. Use to use those things 20 yrs back and never again !!!
Pappa Bear Posted July 23, 2009 Posted July 23, 2009 don't do it! You are gona rattle yourself and your bike to bits! It will be a very harsh ride......don't think it is worth it.
peds Posted March 13, 2018 Posted March 13, 2018 very old thread I know but didnt see the need to start a new one, I am looking for perma tubes for my son's bike. 14" seems to be hard to find does anyone know where I could get? or even tubeless 14" tyres?
Letum911 Posted March 13, 2018 Posted March 13, 2018 @Peds. I know this does not answer your problem , but possibly consider tyre liners if you cannot find perma tubes. If you put in a double layer of tyre liner, a tbs full of baby powder (prevents snake bites) and a slime tube (even on you add slime/juice yourself), you'll need a few sticks of TNT to puncture it.
Darrynbp Posted March 13, 2018 Posted March 13, 2018 I'm not 100% sure why, but I'll ask my mechanic and get him to explain it to me, all I know is that quite often when we get customers in with cheaper bikes that have been using permatubes the rear der. is badly bent. Most probably because of the extra strain to rotate the extra weight of the much heavier wheel. May JB can help here? Hi, no evidence to support this, i manage a bike shop and i have seen what you are referring to and its basically someone not looking after their bike.... it has nothing to do with a perma tube.. however i do agree its not the best option for a bicycle over 20"
Hairy Posted March 13, 2018 Posted March 13, 2018 Hi, no evidence to support this, i manage a bike shop and i have seen what you are referring to and its basically someone not looking after their bike.... it has nothing to do with a perma tube.. however i do agree its not the best option for a bicycle over 20"or more likely a rider who is not aware of how to shift under load ... and would also more than likely be on a elcheapo makro type bike using a der hanger and rear der that would bend in a light South Easter Breeze Darrynbp 1
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