A Temporada do Campeonato Mundial de Motovelocidade de 1955 foi a sétima edição promovida pela F.I.M..

Nos primeiros 26 anos da categoria de 500cc, as fabricantes italianas conquistaram títulos 24 vezes. A histórica MV Augusta foi particularmente dominante, vencendo o seu primeiro campeonato em 1956 e somando títulos consecutivos entre 1958 e 1974. Entre os seus campeões estão os britânicos John Surtees (4 títulos) e Mike Hailwood (4) e o italiano Giacomo Agostini (7).

Noutras classes a competição era muito mais aguerrida, com construtoras como a Honda, Suzuki, Norton e NSU conquistando troféus.

Calendário #DataGrande PrêmioCircuito 1 1° de Maio22px Grande Prêmio da EspanhaMontjuïc Park 2 15 de Maio Grande Prêmio da FrançaReims-Gueux 3 10 de Junho Troféu Turístico da Ilha de ManSnaefell Mountain Course 4 26 de Junho Grande Prêmio da Alemanha OcidentalNürburgring 5 3 de Julho Grande Prêmio da BélgicaCircuito de Spa-Francorchamps 6 16 de Julho Grande Prêmio da HolandaTT Circuit Assen 7 13 de Agosto Grande Prêmio da Irlanda do NorteDundrod 8 4 de Setembro Grande Prêmio das NaçõesAutódromo Nacional de Monza

Resultado das corridas #Grande Prêmio125cc250cc350cc500ccInfo 122px GP da Espanha Luigi TaveriSem DisputaSem Disputa Reg Armstrong 2 GP da França Carlo UbbialiSem Disputa Duilio Agostini Geoff Duke 3 Tourist Trophy Carlo Ubbiali Bill Lomas Bill Lomas Geoff Duke 4 GP da Alemanha Ocidental Carlo Ubbiali Hermann Paul Müller Bill Lomas Geoff Duke 5 GP da BélgicaSem DisputaSem Disputa Bill Lomas Giuseppe Colnago 6 GP da Holanda Carlo Ubbiali Luigi Taveri Ken Kavanagh Geoff Duke 7 GP da Irlanda do NorteSem Disputa John Surtees Bill Lomas Bill Lomas 8 GP das Nações Carlo Ubbiali Carlo Ubbiali Dickie Dale Umberto Masetti

Pilotos e equipes Os seguintes pilotos e equipes foram inscritos para participar do Campeonato Mundial:

500cc Equipe Construtor Moto Pneu N.° Nome do piloto Rodada Scuderia GileraGilera4112R19 Geoff Duke1–1674 Reg Armstrong1–16 Scuderia MV AgustaMV AgustaZIS-2166 Umberto Masetti1–1630 Carlo Bandirola1–16 Wright MotorsportsGilera4112R89 Giuseppe Colnago1–1661 Pierre Monneret1–16 Moto GuzziMoto GuzziAMO-F-1518 Bill Lomas1–1629 Fergus Anderson1–16 Norton Motorcycle CompanyNortonZIL-111G11 John Hartle1–1657 Bob McIntyre1–1650 Jack Brett1–1643 Auguste Goffin1–16 Heinricher RacingGilera4112R93 Libero Liberati1–16 14 Léon Martin1–16 BMW TeamBMWE13442 Walter Zeller1–1224 Ernst Riedelbauch1–1639 Gerold Klinger13–21 Black Swan RacingMoto GuzziAMO-F-1555 Dickie Dale1–1682 Ken Kavanagh1–16 AIM Vasser Sullivan RacingMV AgustaZIS-2136 Tito Forconi1–1279 Nello Pagani1–16 Heart Of Racing TeamMoto GuzziAMO-F-1571 Duilio Agostini1–16 Pfaff MotorsportsGilera4112R10 Orlando Valdinoci1–16 PR1 Mathiasen MotorsportsGilera4112R26 Drikus Veer1–1677 Alfredo Milani1–16 Matchless Motorcycle CompanyMatchless164N68 Bob Brown1–1613 Peter Murphy1–16 Tower Motorsport By StarworksNortonZIL-111G73 Jacques Collot1–1670 Jack Ahearn1–16 Konrad MotorsportMatchless164N17 Eddie Grant1–1291 John Clark1–1644 Derek Ennett13–21 Whelen Engineering RacingNortonZIL-111G83 John Storr1–1621 Firmin Dauwe1–16 DS Marcos Racing InternationalNortonZIL-111G34 Hans-Günther Jäger1–1262 Eric Jones1–1654 Florian Camathias13–21 GRT Grasser Racing TeamNortonZIL-111G96 Piet Bakker1–1612 Len Aislabie1–16 JDC-Miller MotorSportsNortonZIL-111G97 Sven Andersson1–1225 William Hall1–1664 Marcel Beauvais13–21 Reisman Property InterestsNortonZIL-111G94 Alfredo Flores1–1695 Bob Matthews1–16 Scuderia TorinoBMWE1341 Priem Rozenberg1–1267 Tony McAlpine1–16 Larbre CompétitionMatchless164N92 Bill Collett1–1659 Derek Powell1–16 Freisinger MotorsportNortonZIL-111G51 Percy Tait1–125 Jean-Pierre Bayle1–1632 Enrico Galante13–21 Bell MotorsportsMatchless164N22 Kuno Johansson1–1665 Ernst Hiller1–16 Martin Snow RacingNortonZIL-111G99 Phil Heath1–1649 Peter Davey1–164 Edouard Texidor1–1672 Robin Fitton1–16 Triumph EngineeringTriumphKAMAZ-532069 Maurice Low1–1640 Robert McCracken1–16 AF CorseGilera4112R35 Artemio Cirelli1–1678 Paolo Campanelli1–169 Franco Chinelli1–16 Schumacher RacingMatchless164N45 Piet Knijnenburg1–1637 Malcolm Templeton1–163 Ken Tostevin1–1663 Arthur Wheeler1–16 Scuderia BenetinniNortonZIL-111G58 Ray Travers1–1685 John Hempleman1–1690 Mike O'Rourke1–1633 Hans-Joachim Scheel1–16 American Spirit RacingNortonZIL-111G60 Heinz Schreiber1–1616 Casper Swart1–1628 Angus Martin1–1676 Peter Davey1–16 Saleen-Allen SpeedlabMatchless164N81 Harry Pearce1–1623 Frederick Cook1–16 Vincent MotorcyclesNortonZIL-111G52 Karl-Heinz Scheifel1–16 C.J. MotorsportsNortonZIL-111G88 Gerrit Ten Kate1–1615 Harry Turner1–16 Prototype Technology GroupNortonZIL-111G8 Ralph Rensen1–1675 Ernie Oliver1–16 Robinson RacingNortonZIL-111G41 Dick Knox1–1684 Robert King1–16 Art Pilla TT Grand PrixNortonZIL-111G20 Johm Denton1–1686 George Costain1–16 G & W MotorsportsMatchless164N56 Ken Swallow1–1631 Roy Evans1–162 Frank Perris1–1648 Ulf Gate1–1646 Dick Thomson1–1638 Phil Carter1–16 AJS CompanyAJSE169A80 Jimmy Hayes1–167 Bob Ferguson1–16 Rock Valley RacingNortonZIL-111G87 Ivor Lloyd1–1647 Geoff Read1–16 Mosler AutomotiveNortonZIL-111G27 Dave Chadwick1–1653 Eric Pantilin1–16 BSA CompanyBSAHalftrack98 Albert Moule1–166 Philip Palmer1–16 Champion MotorsNortonZIL-111G67 John Surtees1–165 Bob Rowbottom1–16 Fantasy Junction TeamNortonZIL-111G95 George Catlin1–1693 Ken Tully1–16 Panoz Motor SportsNortonZIL-111G60 Terry Shepherd1–1643 Jack Bailey1–1688 Bill Beevers1–1664 Bill Roberton1–1658 Joe Glazebrook1–162 Hans Haldemann1–16 Denaba RacingBSAHalftrack51 Ray Fay1–1681 Ralph Wijesinghe1–1633 Walter Hancock1–1699 Chris Stormont1–1639 Roly Capner1–1656 George Northwood1–16 Team CascandiaNortonZIL-111G31 Willie Wilshere1–1650 Frank Norris1–1614 Keith Campbell1–1671 Francis Flahaut1–1692 Fernando Aranda1–1691 Frank Fox1–16 Horex RacingHorex169G 41 Bruno Böhrer1–1668 Georg Braun1–16 TRV MotorsportsNortonZIL-111G90 Louis Carr1–1647 Louis Carter1–1669 Javier de Ortueta1–1686 Rally Dean1–1632 Stanley Dibben1–1653 Anton Elbersen1–16 Kopf Race ProductsMatchless164N16 Eric Cheers1–1698 Eric Houseley1–1612 Arnold Jones1–1618 George Salt1–1654 Allen Burt1–1679 Sakari Järvimaa1–16 Genesis RacingGilera4112R70 Lodovico Facchinelli1–1663 Martino Giani1–16 Dollahite RacingMoto GuzziAMO-F-1582 Luigi Folconi1–16 Matthews-Colucci RacingBMWE13484 Jack Forrest1–16 Transatlantic Racing ServicesNortonZIL-111G34 Francisco González1–1674 John Grace1–1675 Francesco Guglielminetti1–1642 Wilf Herron1–1665 Roy Ingram1–1622 Harald Karlsson1–16 Doran EnterprisesNortonZIL-111G52 Rudolf Knees1–1623 George Leigh1–1620 Pierre Nicholas1–1645 Tony Ovens1–164 Harry Plews1–1638 Maurice Quincey1–16 Intersport RacingNortonZIL-111G72 Gerald Robarts1–1626 Michael Roche1–1613 Ricardo Galvagni1–1677 Armando Poggi1–1611 R. Siriwardena1–1625 W.H. Spence1–16 Dyson RacingBSAHalftrack44 Charlie Salt1–1648 Des Wright1–16 Team GPMNortonZIL-111G59 W. Stewart1–167 Martinus van Son1–1687 John Williamson1–1678 Jackie Wood1–1655 Erich Wünsche1–16Legenda Piloto da Temporada Piloto Convidado Piloto Substituto

350cc Equipe Construtor Moto Pneu N.° Nome do piloto Rodada Moto GuzziMoto Guzzi917K1 Bill Lomas1–162 Dickie Dale1–16 DKW Auto UnionDKWT70 Mk.3B3 August Hobl1–166 Karl Hofmann1–16 Fortec MotorsportMoto Guzzi917K7 Ken Kavanagh1–1656 Cecil Sandford1–16 Norton Motorcycle CompanyNortonBT84 John Surtees1–165 Bob McIntyre1–16 ADM MotorsportMoto Guzzi917K8 Duilio Agostini1–169 Roberto Colombo1–16 Double R RacingNortonBT810 John Hartle1–16 11 Keith Campbell1–16 MotoparkMoto Guzzi917K12 Enrico Lorenzetti1–128 Carel Godin de Beaufort1–169 Piero Drogo13–21 Performance RacingNortonBT810 Auguste Goffin1–1614 Maurice Quincey1–16 AJS CompanyAJSEcosse C28515 Peter Murphy1–12 Threebond with T-SportDKWT70 Mk.3B16 Hans Bartl1–16 Team West-Tec F3NortonBT817 Jacques Collot1–1618 Innes Ireland1–16 CF RacingNortonBT819 Richie Ginther1–1620 Paul Goldsmith1–16 Triumph EngineeringTriumphXJR-638 Cliff Allison1–16 BSA CompanyBSANAE278740 Willy Mairesse1–12 Mark Bailey RacingNortonBT899 Maurice Trintignant1–1621 Carlos Menditeguy1–16 Scuderia MV AgustaMV AgustaBychok22 Joakim Bonnier1–1223 Giulio Cabianca1–16 BMW TeamBMWGC8525 Henry Taylor1–16 Scuderia GileraGilera43620026 Don Branson1–1227 Masten Gregory1–16 Hummer AutosportHummerZiS-15139 Johnny Thomson1–16 Holden MotorsHoldenAKZ-128 Lucien Bianchi1–1229 Hans Herrmann1–16 MAN SEMANL-320730 Ron Flockhart1–1631 Lloyd Ruby1–16 SEATSEAT118K32 Eddie Johnson1–12 Team PontiacPontiac101 Sport 36 Edgar Barth1–16 Oldsmobile RacingOldsmobilelengthened Z37 Roy Salvadori1–16 Rudge RacingRudgeB-3 half41 Bruce Halford1–16 Excelsior Motor CompanyExcelsiorSHN-142 Bob Veith1–16Legenda Piloto da Temporada Piloto Convidado Piloto Substituto

250cc Equipe Construtor Moto Pneu N.° Nome do piloto Rodada NSU Motorenwerke AGNSUR-Class5 Hermann Paul Müller1–1630 Sammy Miller1–16 Moto GuzziMoto Guzzi917K7 Cecil Sandford1–1670 Arthur Wheeler1–16 Scuderia MV AgustaMV AgustaMarchionne8 Bill Lomas1–1666 Luigi Taveri1–16 Scuderia MilanoMV AgustaMarchionne9 Umberto Masetti1–1618 Carlo Ubbiali1–16 Mücke MotorsportNSUR-Class55 John Surtees1–1663 Hans Baltisberger1–1610 Wolfgang Brandt1–1616 Helmut Hallmeier1–16 Hitech RacingMoto Guzzi917K31 Enrico Lorenzetti1–16 RDS/Norton Racing TeamRDS/NortonRDS/N-188 Dave Chadwick1–12 Velocette RacingVelocetteB811 Bill Webster1–1648 Alberto Larreta1–16 Norton Motorcycle CompanyNortonBT812 Bud Tingelstad1–1225 Roberto Bonomi1–1615 Giorgio Scarlatti13–21 Sino Vision RacingVelocetteB842 Wolfgang Seidel1–1668 Dan Gurney1–16 Scuderia GileraGileraCaliber86 Chuck Daigh1–1622x22px Montesa Honda RacingMontesaPES-120 Ian Burgess1–1622 Bill Homeier1–16 T-SportVelocetteB821 Ettore Chimeri1–1623 Chuck Stevenson1–16 DKW Auto UnionDKWT70 Mk.3B27 Bob Christie1–1674 Fred Gamble1–16 Starling MotorsportMV AgustaMarchionne52 Red Amick1–1269 Duane Carter1–1694 Brian Naylor13–21 Signature TeamGileraCaliber26 David Piper1–16 Mondial MotoMondialPKU-128 Gino Munaron1–12 Scuderia BenelliBenelliRNR233 Nasif Estéfano1–1636 Gene Hartley1–16 AJS CompanyAJSEcosse C28544 Bobby Grim1–1260 Chris Bristow1–1677 Harry Schell13–21 Navistar InternationalVelocetteB889 Alan Stacey1–1699 Lance Reventlow1–16Legenda Piloto da Temporada Piloto Convidado Piloto Substituto

125cc