inner tubes

[princeperch]

So I am now using my bargain folding bike to get to work (4 miles - fairly flat).

I forgot to get a couple of spare innertubes to put in my saddlebag - I haven't purchased innertubes for some time - the wheel states : 20 X 1.50 (40-406).

Do I assume either of these will do the job?

http://www.chainreactioncycles.com/Models.aspx?Mod...

http://www.rushcycles.co.uk/products.php?plid=m2b1...

and if so, should I go for the self sealing option - or are they just a gimmick?

[Parrot of Doom]

Yes they're fine, and don't bother with the goo tubes. Keep your tyres in good order and you won't get punctures.

[princeperch]

much obliged.