Buick Regal Spare Tire Sizes

The Buick Regal has used 5x115mm, 5x120mm and 5x4.75" bolt pattern variations from 1978 to 2020 along with tire diameters ranging from 25.3" to 27.3" tall. Using a temporary spare tire with a diameter close to the standard tire has many benefits, especially for modern vehicles with larger brake calipers and anti-lock brakes or traction control systems. Tire diameter as well as wheel diameter clearance have been taken into account for the specific Buick Regal years and options. In this case, 125/80R17, 145/60R20, 155/70R17 and 165/70R17 spare tire sizes are used to avoid vehicle components while closely matching the original tire size diameters.

YearMakeModelBolt
Pattern
Tire
Diameters
Recommended
Spare
2020BuickRegal Sportback
Regal Sportback Avenir
Regal Sportback GS
Regal TourX
5-115
5-115
5-115
5-120
26.7"
26.7"
26.7"
27.3"
145/60R20 | 26.9"
145/60R20 | 26.9"
145/60R20 | 26.9"
145/60R20 | 26.9"
2019BuickRegal Sportback
Regal Sportback GS
Regal TourX
5-115
5-115
5-120
26.7"
26.7"
27.3"
145/60R20 | 26.9"
145/60R20 | 26.9"
145/60R20 | 26.9"
2018BuickRegal Sportback
Regal Sportback GS
Regal TourX
5-115
5-115
5-120
26.7"
26.7"
27.3"
145/60R20 | 26.9"
145/60R20 | 26.9"
145/60R20 | 26.9"
2017BuickRegal
Regal GS
5-120
5-120
27.3"
26.7"
145/60R20 | 26.9"
145/60R20 | 26.9"
2016BuickRegal
Regal eAssist
Regal GS
5-120
5-120
5-120
26.7-27.3"
26.3-27.3"
26.7-27"
145/60R20 | 26.9"
145/60R20 | 26.9"
145/60R20 | 26.9"
2015BuickRegal
Regal eAssist
Regal GS
5-120
5-120
5-120
26.7-27.3"
26.3-27.3"
26.7-27"
145/60R20 | 26.9"
145/60R20 | 26.9"
145/60R20 | 26.9"
2014BuickRegal
Regal eAssist
Regal GS
5-120
5-120
5-120
26.7-27.3"
26.3-27.3"
26.7-27"
145/60R20 | 26.9"
145/60R20 | 26.9"
145/60R20 | 26.9"
2013BuickRegal
Regal eAssist
Regal GS
5-120
5-120
5-120
26.7-27.3"
26.3"
26.7-27"
145/60R20 | 26.9"
165/70R17 | 26.1"
145/60R20 | 26.9"
2012BuickRegal
Regal eAssist
Regal GS
5-120
5-120
5-120
26.7-27.3"
26.3"
26.7-27"
145/60R20 | 26.9"
165/70R17 | 26.1"
145/60R20 | 26.9"
2011BuickRegal
5-120
26.7-27.3"
145/60R20 | 26.9"
2004BuickRegal
Regal GS
5-115
5-115
26.6-26.9"
26.6"
145/60R20 | 26.9"
165/70R17 | 26.1"
2003BuickRegal
Regal GS
5-115
5-115
26.6-26.9"
26.6"
145/60R20 | 26.9"
165/70R17 | 26.1"
2002BuickRegal
Regal GS
5-115
5-115
26.6-26.9"
26.6"
145/60R20 | 26.9"
165/70R17 | 26.1"
2001BuickRegal
Regal GS
5-115
5-115
26.6-26.9"
26.6"
145/60R20 | 26.9"
165/70R17 | 26.1"
2000BuickRegal
Regal GS
5-115
5-115
26.6-26.9"
26.6"
145/60R20 | 26.9"
165/70R17 | 26.1"
1999BuickRegal
Regal GS
5-115
5-115
26.6-26.9"
26.6"
145/60R20 | 26.9"
165/70R17 | 26.1"
1998BuickRegal
Regal GS
5-115
5-115
26.9"
26.6"
145/60R20 | 26.9"
165/70R17 | 26.1"
1997BuickRegal
Regal GS
5-115
5-115
26.3-26.6"
26.3"
165/70R17 | 26.1"
165/70R17 | 26.1"
1996BuickRegal
5-115
26.3-26.6"
165/70R17 | 26.1"
1995BuickRegal
5-115
26.3-26.6"
165/70R17 | 26.1"
1994BuickRegal
5-115
26.3-26.6"
165/70R17 | 26.1"
1993BuickRegal
5-115
26.3-26.6"
165/70R17 | 26.1"
1992BuickRegal
Regal Gran Sport
5-115
5-115
25.3-26.3"
26.2"
155/70R17 | 25.5"
165/70R17 | 26.1"
1991BuickRegal
Regal Gran Sport
5-115
5-115
25.3-26.3"
26.2"
155/70R17 | 25.5"
165/70R17 | 26.1"
1990BuickRegal
Regal Gran Sport
5-115
5-115
25.3-26.3"
26.2"
155/70R17 | 25.5"
165/70R17 | 26.1"
1989BuickRegal
Regal Gran Sport
5-115
5-115
25.3-26.3"
26.2"
155/70R17 | 25.5"
165/70R17 | 26.1"
1988BuickRegal
Regal Gran Sport
5-115
5-115
25.3-25.7"
26.2"
155/70R17 | 25.5"
165/70R17 | 26.1"
1987BuickRegal
5-475
25.3-26"
155/70R17 | 25.5"
1986BuickRegal
5-475
25.3-26"
155/70R17 | 25.5"
1985BuickRegal
5-475
25.3-26"
155/70R17 | 25.5"
1984BuickRegal
5-475
25.3-26"
155/70R17 | 25.5"
1983BuickRegal
5-475
25.3-25.5"
125/80R17 | 24.9"
1982BuickRegal
5-475
25.3-25.5"
125/80R17 | 24.9"
1981BuickRegal
5-475
25.3-25.5"
125/80R17 | 24.9"
1980BuickRegal
5-475
25.3-25.5"
125/80R17 | 24.9"
1979BuickRegal
5-475
25.5"
155/70R17 | 25.5"
1978BuickRegal
5-475
25.5"
155/70R17 | 25.5"
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