Tirerack tyre calculator doesn't allow for 25series profile tyres

[Stuart@BMRAutowerkes]

As the title states,

the tirerack wheel & tyre calculator in the Wheels and Tyres section has a 30 series profile tyre has the lowest when calculating the difference in speedometer readings from new tyres.

With so many 25series tyres getting around (especially on the 20inch rims) can the calculator be updated?

Thanks.