Inner tubes.

[Lien Sdrawde]

My smaller seat packs obviously only contain essentials. The biggest space is taken by a spare (decathlon) 700×23 inner tube. Are these made in more 'packable' options or are they pretty much all the same? Neil

 

[MontyVeda]

IMO, the more packable alternative to a spare tube is this...

 

[l4dva]

http://www.amazon.co.uk/gp/aw/d/B0017RYO7K

These things are amazing, no more glue blah blah.... just peal and stick it on!

 

[Hacienda71]

Lightweight tubes take up less space, the Planet X ones are dirt cheap, I also carry a tiny box of BBB self adhesive patches. I wouldn't go out without a tube though in case you have a blowout a patch can't fix.

 

[400bhp]

Take a pic of your tube. If it's come straight out of the box they can be packed smaller, by rolling them up rather than folding.

 

[zacklaws]

What seat pack is it? one mans small can be another mans large and vice versa. In my small packs, Fizik and Topeak, I can squeeze in 2 innertubes, repair kit, 3 levers and 2 spare CO2 cartridges.

 

[Lien Sdrawde]

Wow, rolled it up and that's helped quite a bit (maybe 15% extra space) - thanks
Its a 0.4L bag so not big, though I have a good choice of sizes, but I used to pack everything but the kitchen sink in the bigger bags and now seem to be moving towards travelling light.
I too had the fizik small bag and was pleasantly surprised what went in it, but a change of saddle made it redundant.
Thanks for the tips.