i have a 2007 Dahon Speed P8 20" wheel folder. it's a great little bike and it was the bike that got me back into cycling after a long hiatus, but it's been one problem after another with the bike.
first, here's a pic of the bike with the mighty chicago skyline as backdrop:
the first problem was quite minor, but the emergency pump in the seat post broke when it fell out of its housing going over a bump and it got caught in a road crack that bent the shaft, rendering the pump useless. not a huge deal, but annoying none-the-less.
then last spring, while giving my bike a tune-up, i noticed frame cracks starting to form around the seat tube. the speed P8 is a cro-mo model and i was very surprised to see frame cracks developing in a steel frame bike that was only 2 years old and had never been in a wreck or mistreated. i took the bike back to the dealer where i purchased the bike and much to their and dahon's credit, they honored the lifetime frame warranty and switched out the cracked frame with a brand new identical frame free of any charge.
pic of the frame cracks:
after the frame crack issue was resolved, i ended up riding my dahon a lot less frequently. it became my reserve commuter bike, only used on days when inclement weather threatened so i could duck into the nearest CTA station and fold it up and ride the train if needed (i really don't enjoy riding in the rain like some hardcore commuters do).
then this spring, while once again giving the bike a tune-up, i noticed a dangerous looking crack that went all the way through the rim of the rear kinetix pro comp wheel. i took it back into the same shop and the they said the crack definitely made the wheel unsafe to ride, but that the warranty on that part had now expired. a replacement wheel is gonna cost me ~100 bucks.
pic of the rim crack:
so now the bike sits hobbled, waiting for me to decide when to pull the trigger on getting a new wheel. i've since purchased a 3rd bike in the meantime, so i still have two other bikes i can ride, but i do miss the flexibility of having the folder for bad weather days (CTA doesn't allow normal bikes on trains during rush hour). however, with the problems i've already had i fear what lies next down the road if i do get the new wheel fix and start riding it again. the bike is only 3 years old and has already had some fairly serious issues.