 Various sizes of TRAM were defined, from the basic Size 1 TRAM (3.66 in by 1.05 in) up to Size 8 (3.66 in by 8.75 in).Inmos produced a range of TRAM motherboards for various host buses such as Industry Standard Architecture (ISA), MicroChannel, or VMEbus.TRAM links operate at 10 Mbit/s or 20 Mbit/s.