I commute through some pretty rough neighborhoods, and I encounter a ton of glass--there is no avoiding it. I've had my Brompton S2L for 2.5 years, and I've had about 15-20 flat tires in that time frame, all but 3 of them on the front tire. It seems I can't go more than 4-6 weeks without a flat. It's extremely frustrating.

(None of my other bikes have had nearly this many flats, so while I have no proof, I blame the small wheel size. I suppose it makes sense, since the smaller the wheel, the faster the rotation, the more each part of the tire has contact with the road, right? Anyway...)

I had Brompton green tag tires from February 2009-March 2010, which were terrible. I switched to Schwalbe Marathons and rode those for a year and still got a bunch of flats. When those wore out in early April this year, I put a pair of Schwalbe Kojaks on that I thankfully got for free, because they're terrible. I've already gotten 3 flats, and they're wearing very poorly--there are big gashes in them all around. And it's not just me. My partner got her Brompton with brand new Kojaks in early June, and hers were so badly torn up that she already had to replace them. She got a pair of new Brompton tires, which are supposedly tougher than the other types. I'm interested to see how they hold up.

So...anyone have any other suggestions?? I feel like I'm running out of options and may just have to accept that riding the Brompton = lots of flats. It's the one and only thing I don't love about this bike.