Friday, November 8, 2013

What happens to tire slime after its expiration date?

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Colin


Hi,

Some while ago I bought some slime/tire sealant for my mountain bike. The tube it came in says it lasts from two to six months.

I was wondering: could I put some new slime into an inner tube with expired slime? What happens to the slime when it expires? Does it become like a paste or evaporate?

Thanks.



Answer
I have had Slime tubes in my MTB for over 2 years. Same tube, same slime. Every week or so they lose around 10 psi if left unchecked (maybe it's time for some new slime tubes) , but this is no problem if you regularly check and change your tyre pressure for riding different conditions/surfaces. Around 2 or 3 times in this time I have got a flat tyre. All I did was spin the wheel to re distribute the slime and then pump up it back up and it is fine.

Sure it was a bit messy when it was time to get a new rear tyre (it gets slimy between the tyre and tube!) but it was clear that after inspecting the tube, it had in fact sealed quite a few small punctures (got bored and gave up counting after around 10). Once in the new tyre I gave it a nice spin and spread the slime out and it is fine.

So no need to fix a puncture during the whole life of an MTB tyre used all different conditions/surfaces.

All the nay sayers who say Slime does not work, you must have only had experience with cheap products and not proper Slime ( http://www.slime.com/ ) or not used them at all and just going by a few bad reviews. And yes, the valve would clog up if you let the air of of your tube tooo fast!

So yeah, to answer your question, don't worry mine are keeping my tyres full of air and stopping puncture after 2 years, maybe I will get some new tubes and slime when I wear out these tyres...

Where to buy a cheap mountain bike in London?




mael


I wanna buy a cheap (below 100 pounds) men mountain bike in London. I precise that I don't need top quality, simply a basic one. The only stores I could find with real cheap prices are Halfords and Sportsdirect.
While I could find online many bad reviews on Halfords, I have no idea about sportsdirect.
Anybody has experience with one of those? Are the bikes decent? Alternatively, do you know any other store?



Answer
The bikes in halfords the cheaper models are very heavy and the brakes go out of tune very easily and the gears. They all have shimano gearing which is a good start but they would be one of the lower grades of derailleurs made by shimano. If you could spend a little bit more go for a carrea bike in halfords I have there racing bike and it's fantastic for the price apart from the seat and pedals in which I changed for about 50 euro.

Not all the bikes in halfords are bad some are very good but as with everything you get what you pay for if you buy a cheap model you get cheaper components which will not perform as well as other bikes. look into the hybrid bikes which will give you a faster speed on roads compared to mountain bike tyres and an important thing as well you don't want to get a bike with suspension as you will not get your full power with every spin of your pedals the suspension will bend taking some of the power.

Best of luck in finding your bike.




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