Slime problem

merlin morris

Simple question!

There are many thorns were I have just moved.

How do I force a presta valve core back through the valve stem with out damaging the tube after sliming it?

Thanks

Tmax

I know this really isn't an answer to your question, but thought I would offer my opinion. I switched to schrader valves years ago, mainly because they were easier to Slime. Also, when you're out on the trail, and are in desperate need of a tube to get home, you can borrow either a schrader or presta stemmed tube. I drilled out the stem hole in the rim to fit schrader, and have never had a problem.

Maybe someone can tell me why presta valves are so popular. I can see no real advantage of any kind using them over schrader valves. Maybe it's just a Gucci thing...

Tom

merlin morris

Regarding slime, I have also posted this question at cyclingtech talk forum with no results. Maybe I am just ham handed. I will probably do the next tubes with a q tip.

Prestas are used mainly because, the hole they make in the rim is smaller but also because the mechanism is simple, with a floor pump they are easier to fill. I bet they are much lighter also. Ever try a Dunlop?

Tmax

No, I haven't tried a Dunlop.

I can certainly see where you would need a presta valve tube with road wheels, because of the narrow width. With mountain bike rims, that isn an issue. I have bought rims that come drilled for schrader, but have a presta insert (adapter).

As far as simplicity, I really don't see how a presta is simpler than a schrader valve. Nothing to open and close. No adapters required for pumps or compressors.

As far as weight is concerned, there can't be more that a few grams difference, but don't know for sure. If you can tell the difference, you're probably a hell of a lot better rider than I amhttp://www.cyclingforums.com/images/icons/icon12.gif

Anyway, I think it must be a personal preference thing. All I know, though, is since I've changed to schrader, I can slime my tubes with no problems, and other than that, I can't tell the difference as to what tube is in my tire.

Tom

merlin morris

The other thing is I want to use the same valve for all my bikes, it’s easier with the pumps. And I already own 5 presta MTB rims. And the main bike with thorn problems is a cyclocross bike.



One other reason to use presta I think, is that they may be a bit easier to mount with the valve straight. And they have that cool little collar.



Dunlops are still common in Germany and maybe other places somewhat like a shrader you can disassemble. Its quite annoying to use one bc the valve is slightly different diameter requiring a change with the chuck. I was very confused the first time I got one!

Tmax

Okay, if I had several bikes, I would use a common valve type, too...that makes a lot of sense.

I'll have to do a search on the Dunlop. I've never seen one.

Good luck solving your Slime problem.

Tom

1id10t

Not sure if they do it for presta tubes but you can buy pre-slimed tubes in the schrader style. Might be worth checking to see if presta is also available. The price I paid for a single tube would be equivalent to buying a normal tube plus the slime (only you don't have the hassle of trying to get the slime in )

dvddobson

i switched to tubeless using mavic dee max wheels (ust) and continental tires (ust) i als put in a bit of stans no tubes fluid in case of thorns

moparchris

i dunno if anyone has already said this cause i dont have time to read everything but how about give up with slime because its crap and use notubes, get a rimstrip and fluid and it'll be lighter and its piss easy to use

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merlin morris

Thanks moparchris
i dunno if anyone has already
ect ect

merlin morris

Madhouse159

Ive got presta valves, and i simply used slime liners instead, they might be a little heavier but they stop a puncture.