I`m now riding a 2009 Curve SL but used to ride the 2007 model. I wonder sometimes if I should replace the Marathon Racers on my 2009 with Big Apples. However, where I ride the roads are usually pretty smooth so can`t really justify the switch, besides, the Marathon`s are bit faster, or perhaps that`s my imagination?
Other differences, (in case you are interested) between models, are a longer wheelbase and much less flexy handlepost on the `09.