This Wreckage

I need a tube for a 700c x 38-622 tyre. Will a 29" x 1.85-2.2" tube (same valve type) fit?

base2 

38/25.4=1.496 inches
Your tire is smaller than your tube & it's not even close. Welcome to wrinkle-town.

No.

HillRider

I agree that tube is too large to fit properly in that tire. The wheel diameter is OK (29" and 700c are the same rim diameter) but that tube is too fat.

This Wreckage

Thanks. I've just noticed that the local supplier I've looked at does in fact have the exact correct Slime tube, so no problem here. Thanks.

Crankycrank

My experience with Slime tubes is that they aren't all that reliable at sealing punctures and are a complete PITA to patch as the Slime has to be completely cleaned off and any Slime seeping out will prevent the patch from adhering.

This Wreckage

My experience on this bike's other wheel is of no more punctures, which I'd gotten completely fed up with fixing every few journeys. I fitted one last June and have had no punctures since. I'm sure you're right about the hassle with fixing them, though.

Schweinhund

They are absolutely wonderfull at sealing puncturers, just nothing else. Not to mention you have to remove the valve stem and clean all the slime fibers out of it before you can air the tube up.

veganbikes

Nobody could pay me to use a slime tube. That is how horrible they are. If you use good tires and keep them properly inflated you are less likely to have punctures and if you are still having punctures you might try Tannus Armour. Putting nasty goo in tubes is just a mess for anyone who has to change it and problematic when you need to actually inflate as it can gum up the works. A standard good quality inner tube with proper pressure inside of a tire with some puncture protection that is of good quality will do you much better.

This Wreckage

I see a lot of hatred for Slime here! I'm sure you are right about the problems of dealing with them, but two Tannus Armour tyres are £70. I've experience with puncture-resistant tyres which were no better than any others, so I'm happy to stick (no pun intended) with Slime for now.

Trakhak

That price is about par for the course for a pair of decent tires, puncture resistant or otherwise.

veganbikes

Just to be clear I am not talking tires, I am talking about the inserts. But with a good set of tires you may not need them. If you buy cheap tires they will have the likelihood of more flats. I would get a well rated tire with good puncture protection keep things properly inflated and you are less likely to have issues and if you are having issues try to figure out what those issues are so you can try and correct them either with different tires or adding in those inserts.

Yes we don't like messy nasty goo in our tubes especially when you have to change them. They are heavy and lumpy and just gross. If I am going to put fluid in there I will just go tubeless and avoid having a tube and then avoid the pinch flats which are super common and easily stopped with proper inflation but none the less common.

fooferdoggie 

the problem with slime and most sealants is higher psi. they work at around 50 psi or lower pretty well. above that its pretty random if it will work.