Just put a pair of 1.7 Marathons on this morning and noticed I only have 1.9-2.5 tubes. Don’t have any spares because I got 2 punctures over the w/end (which I’ll repair with sticky patches even though I don’t have full confidence in them). Now, if I go out this afternoon, am I massively increasing my chances of a flat? Read earlier that someone with wrong tubes was getting punctures every 20-30 mins or so. Nay good seeing as I’ll be out for say 3 hours.

Cheers