The 1955 Nations motorcycle Grand Prix was the eighth and final round of the 1955 Grand Prix motorcycle racing season. It took place on 4 September 1955 at the Autodromo Nazionale Monza.

500 cc classification Pos Rider Manufacturer Laps Time Points 1 Umberto Masetti MV Agusta 35 1:08:04.1 8 2 Reg Armstrong Gilera 35 +0.5 6 3 Geoff Duke Gilera 35 +1.6 4 4 Giuseppe Colnago Gilera 3 5 Alfredo Milani Gilera 2 6 Ernst Riedelbauch BMW 1 7 Gerold Klinger BMW 8 Bill Hall Norton 9 Enrico Galante Norton 10 A. Cirelli Gilera

350 cc classification Pos Rider Manufacturer Laps Time Points 1 Dickie Dale Moto Guzzi 27 55:21.3 8 2 Bill Lomas Moto Guzzi 27 +0.1 6 3 Ken Kavanagh Moto Guzzi 27 +13.1 4 4 Enrico Lorenzetti Moto Guzzi 3 5 August Hobl DKW 2 6 Roberto Colombo Moto Guzzi 1 7 Helmut Hallmeier NSU 8 Siegfried Wünsche DKW 9 Arthur Wheeler AJS 10 Lodovico Facchinelli AJS 11 Bill Hall Norton 12 Erwin Aldinger Horex 13 Sven Andersson Norton 14 Arthur Wick AJS

250 cc classification Pos Rider Manufacturer Laps Time Points 1 Carlo Ubbiali MV Agusta 22 46:34.1 8 2 Hans Baltisberger NSU 22 +0.3 6 3 Sammy Miller NSU 22 +15.6 4 4 Hermann Paul Müller NSU 3 5 Bill Lomas MV Agusta 2 6 Umberto Masetti MV Agusta 1 7 Roberto Colombo Moto Guzzi 8 Kurt Knopf NSU 9 Karl Lottes DKW 10 Arthur Wheeler Moto Guzzi 11 Günter Beer Adler 12 Adelmo Mandolini Moto Guzzi 13 Lanfranco Baviera Moto Guzzi 14 Alfredo Flores Moto Guzzi 15 Dino Fagiolini Moto Guzzi 16 René Guérin Moto Guzzi 17 Guido Sala Moto Guzzi

125cc classification Pos Rider Manufacturer Laps Time/Retired Points 1 Carlo Ubbiali MV Agusta 18 41:03.8 8 2 Remo Venturi MV Agusta 18 +27.1 6 3 Angelo Copeta MV Agusta 18 +1:42.2 4 4 August Hobl DKW 18 +1:44.5 3 5 Siegfried Wünsche DKW 17 +1 lap 2 6 Paolo Campanelli Mondial 17 +1 lap 1 7 Guido Sala MV Agusta 8 Karl Lottes MV Agusta 9 Willi Scheidhauer MV Agusta 10 Florian Camathias MV Agusta 24 starters, 15 finishers Source:

Sidecar classification Pos Rider Passenger Manufacturer Laps Time Points 1 Wilhelm Noll Fritz Cron BMW 18 41:21.6 8 2 Walter Schneider Hans Strauss BMW 18 +0.2 6 3 Jacques Drion Inge Stoll Norton 18 +58.6 4 4 Florian Camathias Maurice Büla BMW 3 5 Jean Murit Francis Flahaut BMW 2 6 Fritz Seeber Franz Heiss BMW 1 7 Friedrich Staschel Edgar Perduss BMW 8 Loni Neussner ? Norton 9 Alfonso Sammarchi ? Norton 10 Fritz Mühlemann K. Tuscher BSA 11 A. Baldi ? BSA

References