This upgrades theCycleOps aluminum roller to make it less likely you will fall off the side of your rollers. No modifications to CycleOps rollers are required, these fit on using the stock hardware.

roller stops.STL should be used for the front wheel roller - print two of these

roller stops minus 20.STL is tilted backwards by 20 degrees - print two of these for the back of back wheel rollers
roller stops plus 20.STL is tiled forward by 20 degrees - print two of these for the back wheel rollers.

MakerBot

MakerBot Replicator 2X

Yes

No

0.2

20%

Print the plus 20 and minus 20 brackets such that slanted part does not create an overhang. You might have to flip the part over before you print it.

You might need to slightly open the holes depending on your printer, a drill bit or file should do fine.

I purchased a cheap pair of roller blades on sale, you might be able to get a set from a thrift store. My wheels are 76mm flat (all 8 wheels are the same size). Other wheels sizes would work too.

The wheel diameter is 76mm
The axle is 6mm diameter
The inside diameter of the bearings and bushings is slightly larger than 6mm (approx. 6.1mm)
The width of the wheel including the bushings is 28mm
The length of the axle is 33mm without the heads, or 40mm with the heads