MTs sets are supposedly made by the same off-shore factory that makes the sets sold by other companies.
I have used two such sets.
Comparing highways speeds require knowing tire diameters and transmission top-gear ratio.
I run at around 68mph at around 2600 RPM.
I find it very nice (and more economical) to cruise at 60-65 MPH.
http://www.csgnetwork.com/multirpmcalc.html