I am not sure whether the new "Big Ben" tires from Schwalbe will fit the Swift. these are the wide(r) version of the big Apple tires with a bit more tread for offroading.

I have two Swifts and wanted to mount it alternately on the one for light mountain biking and the other for commuting.

now here's the interesting thing: it clears the fork on the older (2006) Swift just fine but scrapes a bit against the newer (2011) frame. not sure what is going on.

anyone else have experience trying to "fit the fatties"? again, these are not the 50mm/2" tires but the 55mm/2.15s.