2018 Moto3 World Championship

Teams and riders

Team changes

• Mahindra and Peugeot withdrew from the Championship after the 2017 season. Ángel Nieto Team, Redox PrüstelGP, and CIP - Green Power switched to KTM as a result of their withdrawal.
• AGR Team folded its operations in both Moto2 and Moto3 following the 2017 Aragon GP due to financial issues coupled with poor performance throughout the 2017 season.
• British Talent Team's Moto3 team put in a temporary hiatus for the next few years starting from 2018.
• Marinelli Snipers have downsized to one bike in exchange for one slot in Moto2.
• Avintia Racing returned to Moto3 after a five-season hiatus. They joined forces with Team Stylobike to form Reale Stylobike, fielding a KTM for Livio Loi.
• Red Bull KTM Ajo also downsized to one bike.

Rider changes

• Enea Bastianini moved to Leopard Racing, filling in the seat vacated by Joan Mir who moves up to Moto2, with Alonso López replacing Bastianini in Estrella Galicia 0,0.
• Sky VR46 rider Andrea Migno rode for Ángel Nieto Team, replacing Lorenzo Dalla Porta.
• Dennis Foggia made his full season debut in Moto3 with Sky Racing Team VR46, having previously competed as a replacement and wildcard rider in the 2017 season.
• Jaume Masiá made his full season debut at Moto3 with Bester Capital Dubai after previously competing as a replacement rider for the team in the 2017 season.
• Marco Bezzecchi moved from CIP to Redox PrüstelGP, replacing Patrik Pulkkinen.
• Niccolò Antonelli moved from Red Bull KTM Ajo to Sic58 Squadra Corse.
• After his full season debut with Sic58 Squadra Corse, Tony Arbolino moved to Marinelli Rivacold Snipers.
• Darryn Binder rode for Red Bull KTM Ajo, replacing Bo Bendsneyder who graduated to Moto2 with Tech 3.
• Lorenzo Dalla Porta raced with Leopard Racing, replacing Livio Loi, who moved to Reale Avintia Academy.
• Makar Yurchenko made his Moto3 debut with CIP, replacing Manuel Pagliani.
• Both Romano Fenati and Jules Danilo moved up to Moto2, joining Marinelli Rivacold Snipers and SAG Team respectively.
• John McPhee joined the CIP team as British Talent Team hiatus.
• María Herrera left Moto3 for the Supersport 300 World Championship.
• Juan Francisco Guevara didn't continue with the RBA Boé Racing Team after he announced his retirement from professional racing for personal reasons. He replaced by the 2017 Red Bull Rookies Cup champion Kazuki Masaki.

Mid-season changes

• Makar Yurchenko left the CIP - Green Power after his contract was terminated by mutual agreement due to inconsistent race results. He was replaced by Stefano Nepa from Dutch TT onwards to join CIP - Green Power for the remainder of the season.
• Reale Avintia Academy expanded to enter a second bike, which will be ridden by Vicente Pérez. Reale Avintia raced under the name of "Reale Avintia Academy 77" from Catalan motorcycle Grand Prix onwards in honor of the late Andreas Pérez. Livio Loi left the Reale Avintia midway through the season due to inconsistent race results, managing only 8 points over 8 races. He will be replaced by Vicente for the remainder of the season.
• Darryn Binder missed the German motorcycle Grand Prix due to injury, he was replaced by the Spaniard Raúl Fernández.
• Arón Canet missed the Thailand motorcycle Grand Prix due to injury, he was replaced by Jeremy Alcoba.

Calendar

Round	Date	[List of List of Grand Prix motorcycle races|Grand Prix motorcycle races|Grand Prix]	Circuit
1	18 March	Calendar changes The British Grand Prix was scheduled to move from Silverstone to the new Circuit of Wales, but construction on the new track has not commenced. The two circuits reached a deal that will see Silverstone with an option to host the 2018 race. The Thailand Grand Prix is a new addition to the calendar, with the race scheduled for 7 October. The Catalan Grand Prix used a new configuration of the Circuit de Barcelona-Catalunya, wherein the previous set of corners of turns 13, 14 and 15 was combined into a sweeping right corner. The new layout was previously used in Formula 1 from 2004 to 2006. Results and standings Riders' standings ;Scoring system Points were awarded to the top fifteen finishers. A rider had to finish the race to earn points. Position 1st 2nd 3rd 4th 5th 6th 7th 8th 9th 10th 11th 12th 13th 14th 15th Points 25 20 16 13 11 10 9 8 7 6 5 4 3 2 1 Constructors' standings Each constructor received the same number of points as their best placed rider in each race. Teams' standings The teams' standings were based on results obtained by regular and substitute riders; wild-card entries were ineligible.