Is anyone familiar with this. 25mm Rear Wheel Conversion Kit (not shown) GYT-0SS56-31-42 $59.95 It's listed under the "standard" rear wheel accessory for the 09/10. It would be nice if they had a kit to convert the older smaller axles with a bearing/seal kit. I'd like to buy a spare rear wheel, but short of spending a whole bunch of money, I can't find a good solution. It's easy to find the older wheels.