[JimR]

I had R14s on my 3e tractor, they're awesome tires. Double check, but I don't think Titan makes them in the correct size for the front on the 2r series tractors.

This is technically correct. The "R14": moniker appears to be owned by Titan. But there are Galaxy Garden Pro tires that have a "R14-;like" tread pattern and come in radials that will fit the Gen 2 2-series machines. You'll need proper wheels to make them work.

 

[JimR]

The main differences are that 1) R14s are bias ply...

R14s are available in both bias ply and radial. They aren't available in both in all sizes but saying
"R14s are bias ply" is false.