I believe the one you linked, has too big of a dial to fit correctly.This Tel-Tru fits the Genesis, which I believe is the same size as the MT and SSP.Weber Genesis Gold B/C Grill Replacement
Here is some detail on putting a tel-tru BQ100 in a newer thermometer bezel: http://weberkettleclub.com/forums/weber-kettles-accessories/weber-parts-reference/I checked my weber thermometer against an instant read all the way up to water boil, and it was right on. But it looks like some Webers are way off.