As a BR owner, I can confirm that there's quite a bit of room between a 26" tire and the seat tube at bottom out. As to whether a 650 would fit, no idea. Though to me, pretty much the best thing about the BR is how low it is, and bigger wheels would detract from that.
Since it specs a 7 7/8 by 2 1/4 shock, you could always put a 7 7/8 by 2 on to get some extra clearance if needed.
Since it specs a 7 7/8 by 2 1/4 shock, you could always put a 7 7/8 by 2 on to get some extra clearance if needed.
