275/45R21 Compatible Tire Sizes

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The 275/45R21 has an overall diameter of 78.1 cm. The T&RA recommended rim width for a 275mm section width is 8–10 inches, with a measuring rim of 9 inches. This page lists 69 compatible alternatives within 3% of the original diameter. Sizes are organized by wheel diameter. Within each section, the closest match per treadwidth is shown in italics. All sizes are theoretical and there may not be an actual production tire for the size.

Use our interactive tire size compatibility lookup →

275/45R21 Specifications

Recommended Rim Width

8–10 in

Measuring: 9 in

8" 10"

Sidewall Height

12.4 cm

Visible Sidewall

10.6 cm

4.2 in

Overall Diameter

78.1 cm

30.7 in

Tire Size	Diameter (cm)	Sidewall (cm)	Visible SW (cm)	% Difference	Speed @ 30mph	Speed @ 60mph
255/50R20	76.3	12.8	11.0	-2.3%	29.3 mph	58.6 mph
255/55R20	78.8	14.0	12.3	+1.0%	30.3 mph	60.6 mph
265/50R20	77.3	13.3	11.5	-1.0%	29.7 mph	59.4 mph
265/55R20	80.0	14.6	12.8	+2.4%	30.7 mph	61.4 mph
275/50R20	78.3	13.8	12.0	+0.3%	30.1 mph	60.2 mph
285/45R20	76.5	12.8	11.1	-2.1%	29.4 mph	58.7 mph
285/50R20	79.3	14.3	12.5	+1.5%	30.5 mph	60.9 mph
295/45R20	77.3	13.3	11.5	-0.9%	29.7 mph	59.4 mph
295/50R20	80.3	14.8	13.0	+2.8%	30.8 mph	61.7 mph
305/45R20	78.3	13.7	12.0	+0.2%	30.1 mph	60.1 mph
315/40R20	76.0	12.6	10.9	-2.7%	29.2 mph	58.4 mph
315/45R20	79.2	14.2	12.4	+1.4%	30.4 mph	60.8 mph
325/40R20	76.8	13.0	11.3	-1.7%	29.5 mph	59.0 mph
325/45R20	80.0	14.6	12.9	+2.5%	30.8 mph	61.5 mph
335/40R20	77.6	13.4	11.7	-0.6%	29.8 mph	59.6 mph
345/40R20	78.4	13.8	12.1	+0.4%	30.1 mph	60.2 mph
355/40R20	79.2	14.2	12.5	+1.4%	30.4 mph	60.9 mph

Tire Size	Diameter (cm)	Sidewall (cm)	Visible SW (cm)	% Difference	Speed @ 30mph	Speed @ 60mph
255/45R21	76.3	11.5	9.7	-2.3%	29.3 mph	58.6 mph
255/50R21	78.8	12.8	11.0	+1.0%	30.3 mph	60.6 mph
265/45R21	77.2	11.9	10.2	-1.2%	29.7 mph	59.3 mph
265/50R21	79.8	13.3	11.5	+2.2%	30.7 mph	61.3 mph
275/45R21 (Original)	78.1	12.4	10.6	+0.0%	30.0 mph	60.0 mph
285/40R21	76.1	11.4	9.7	-2.5%	29.3 mph	58.5 mph
285/45R21	79.0	12.8	11.1	+1.2%	30.3 mph	60.7 mph
295/40R21	76.9	11.8	10.1	-1.5%	29.6 mph	59.1 mph
295/45R21	79.9	13.3	11.5	+2.3%	30.7 mph	61.4 mph
305/40R21	77.7	12.2	10.5	-0.4%	29.9 mph	59.7 mph
315/40R21	78.5	12.6	10.9	+0.6%	30.2 mph	60.3 mph
325/35R21	76.1	11.4	9.6	-2.6%	29.2 mph	58.5 mph
325/40R21	79.3	13.0	11.3	+1.6%	30.5 mph	61.0 mph
335/35R21	76.8	11.7	10.0	-1.7%	29.5 mph	59.0 mph
335/40R21	80.1	13.4	11.7	+2.6%	30.8 mph	61.6 mph
345/35R21	77.5	12.1	10.3	-0.8%	29.8 mph	59.5 mph
355/35R21	78.2	12.4	10.7	+0.1%	30.0 mph	60.1 mph

Tire Size	Diameter (cm)	Sidewall (cm)	Visible SW (cm)	% Difference	Speed @ 30mph	Speed @ 60mph
255/40R22	76.3	10.2	8.5	-2.3%	29.3 mph	58.6 mph
255/45R22	78.8	11.5	9.7	+0.9%	30.3 mph	60.6 mph
265/40R22	77.1	10.6	8.9	-1.3%	29.6 mph	59.2 mph
265/45R22	79.7	11.9	10.2	+2.1%	30.6 mph	61.3 mph
275/40R22	77.9	11.0	9.3	-0.3%	29.9 mph	59.8 mph
285/35R22	75.8	10.0	8.2	-2.9%	29.1 mph	58.3 mph
285/40R22	78.7	11.4	9.7	+0.8%	30.2 mph	60.5 mph
295/35R22	76.5	10.3	8.6	-2.0%	29.4 mph	58.8 mph
295/40R22	79.5	11.8	10.1	+1.8%	30.5 mph	61.1 mph
305/35R22	77.2	10.7	8.9	-1.1%	29.7 mph	59.3 mph
305/40R22	80.3	12.2	10.5	+2.8%	30.8 mph	61.7 mph
315/35R22	77.9	11.0	9.3	-0.2%	29.9 mph	59.9 mph
325/35R22	78.6	11.4	9.6	+0.7%	30.2 mph	60.4 mph
335/30R22	76.0	10.0	8.3	-2.7%	29.2 mph	58.4 mph
335/35R22	79.3	11.7	10.0	+1.6%	30.5 mph	61.0 mph
345/30R22	76.6	10.3	8.6	-1.9%	29.4 mph	58.8 mph
345/35R22	80.0	12.1	10.3	+2.5%	30.7 mph	61.5 mph
355/30R22	77.2	10.7	8.9	-1.2%	29.7 mph	59.3 mph

Current Tire Pricing

Tire	Size	Price/Tire
275/45R21
Vredestein Ultrac ProMax Performance Summer	275/45R21	$283.10
Continental ExtremeContact DWS 06 PlusUltra High Performance All-Season	275/45R21	$435.99
Michelin Pilot Sport All Season 4Ultra High Performance All-Season	275/45R21	$498.99
Michelin CrossClimate2Grand Touring All-Season	275/45R21	$412.99
Vredestein Quatrac Pro+Grand Touring All-Season	275/45R21	$375.77
Goodyear Assurance WeatherReady2Grand Touring All-Season	275/45R21	$398.99
Vredestein Wintrac Pro+Performance Winter / Snow	275/45R21	$312.55
Pirelli Scorpion Winter 2Performance Winter / Snow	275/45R21	$462.00
Pirelli Scorpion WinterPerformance Winter / Snow	275/45R21	$521.21
Alternative Sizes · 265/45R21, 285/40R21, 285/45R21
Vredestein Ultrac ProMax Performance Summer	265/45R21	$305.22
Vredestein Ultrac ProMax Performance Summer	285/40R21	$301.90
Continental ExtremeContact DWS 06 PlusUltra High Performance All-Season	265/45R21	$382.99
Michelin Pilot Sport All Season 4Ultra High Performance All-Season	265/45R21	$450.99
Continental ExtremeContact DWS 06 PlusUltra High Performance All-Season	285/40R21	$468.99
Michelin Pilot Sport All Season 4Ultra High Performance All-Season	285/40R21	$549.99
Michelin Pilot Sport All Season 4Ultra High Performance All-Season	285/45R21	$516.99
Michelin CrossClimate2Grand Touring All-Season	265/45R21	$451.99
Vredestein Quatrac Pro+Grand Touring All-Season	265/45R21	$322.77
Goodyear Assurance WeatherReady2Grand Touring All-Season	265/45R21	$436.99
Michelin CrossClimate2Grand Touring All-Season	285/45R21	$435.99
Vredestein Quatrac Pro+Grand Touring All-Season	285/40R21	$426.77
Vredestein Quatrac Pro+Grand Touring All-Season	285/45R21	$378.77
Goodyear Assurance WeatherReady2Grand Touring All-Season	285/45R21	$409.99
Goodyear Wrangler Steadfast HTHighway All-Season	265/45R21	$370.99
Falken WildPeak A/T TrailOn-Road All-Terrain	265/45R21	$247.00
Vredestein Wintrac Pro+Performance Winter / Snow	265/45R21	$337.26
Vredestein Wintrac ProPerformance Winter / Snow	265/45R21	$311.63
Pirelli Scorpion WinterPerformance Winter / Snow	265/45R21	$470.31
Michelin Pilot Alpin 5 SUVPerformance Winter / Snow	285/40R21	$423.88
Michelin Pilot Alpin 5 SUVPerformance Winter / Snow	285/45R21	$454.63
Vredestein Wintrac Pro+Performance Winter / Snow	285/40R21	$339.31
Vredestein Wintrac Pro+Performance Winter / Snow	285/45R21	$337.59
Pirelli Scorpion Winter 2Performance Winter / Snow	285/40R21	$457.18
Pirelli Scorpion Winter 2Performance Winter / Snow	285/45R21	$576.86
Pirelli Scorpion WinterPerformance Winter / Snow	285/45R21	$549.36
Michelin X-Ice Snow SUVStudless Ice & Snow	265/45R21	$482.65
Nokian Hakkapeliitta R5 SUVStudless Ice & Snow	285/45R21	$550.72

Price availability updated May 2026. Actual prices may vary.

Tire Recommendations

Max Performance Summer

Spirited street driving and occasional track use

Michelin Pilot Sport 4S

Treadwear: 300

265/40R22 +1", -10mm 275/40R22 +1" 285/35R22 +1", +10mm 285/40R22 +1", +10mm 295/35R22 +1", +20mm 325/35R22 +1", +50mm

Vredestein Ultrac Pro

Treadwear: None

275/45R21 255/50R20 -1", -20mm 255/55R20 -1", -20mm 275/50R20 -1" 265/45R21 -10mm 285/40R21 +10mm 295/40R21 +20mm 315/40R21 +40mm 265/40R22 +1", -10mm 275/40R22 +1" 285/35R22 +1", +10mm 285/40R22 +1", +10mm 325/35R22 +1", +50mm

Bridgestone Potenza Sport

Treadwear: 300

255/50R20 -1", -20mm 285/45R20 -1", +10mm 255/45R21 -20mm 295/40R21 +20mm 255/40R22 +1", -20mm 255/45R22 +1", -20mm 265/40R22 +1", -10mm 285/40R22 +1", +10mm 295/35R22 +1", +20mm 325/35R22 +1", +50mm

Ultra High Performance All-Season

Year-round daily driving with performance capability

Grand Touring All-Season

Comfortable, long-wearing all-season tires for daily driving

Michelin CrossClimate2

Treadwear: 640

275/45R21 255/50R20 -1", -20mm 255/55R20 -1", -20mm 265/50R20 -1", -10mm 275/50R20 -1" 285/45R20 -1", +10mm 265/45R21 -10mm 285/45R21 +10mm 255/45R22 +1", -20mm 275/40R22 +1" 285/40R22 +1", +10mm

Vredestein Quatrac Pro+

Treadwear: 400

275/45R21 255/50R20 -1", -20mm 255/55R20 -1", -20mm 265/50R20 -1", -10mm 285/45R20 -1", +10mm 265/45R21 -10mm 285/40R21 +10mm 285/45R21 +10mm 275/40R22 +1" 285/35R22 +1", +10mm 285/40R22 +1", +10mm

Continental SecureContact AW

Treadwear: 700

255/50R20 -1", -20mm 255/55R20 -1", -20mm 265/50R20 -1", -10mm

Goodyear Assurance WeatherReady2

Treadwear: 700

275/45R21 255/50R20 -1", -20mm 255/55R20 -1", -20mm 265/50R20 -1", -10mm 275/50R20 -1" 285/45R20 -1", +10mm 265/45R21 -10mm 285/45R21 +10mm 265/40R22 +1", -10mm 275/40R22 +1"

On-Road All-Terrain

Pavement-primary with light off-road and gravel capability

Bridgestone Dueler A/T Ascent

Treadwear: None

255/55R20 -1", -20mm 265/50R20 -1", -10mm 275/50R20 -1"

Cooper Discoverer Road+Trail AT

Treadwear: 620

255/55R20 -1", -20mm 265/50R20 -1", -10mm

Falken WildPeak A/T Trail

Treadwear: 620

255/50R20 -1", -20mm 255/55R20 -1", -20mm 265/50R20 -1", -10mm 265/45R21 -10mm

Nitto Nomad Grappler

Treadwear: 620

255/50R20 -1", -20mm 255/55R20 -1", -20mm 265/50R20 -1", -10mm 285/50R20 -1", +10mm

Vredestein Pinza AT

Treadwear: 620

255/50R20 -1", -20mm 265/50R20 -1", -10mm

Yokohama Geolandar A/T4

Treadwear: 700

255/50R20 -1", -20mm 255/55R20 -1", -20mm 265/50R20 -1", -10mm 265/55R20 -1", -10mm 285/50R20 -1", +10mm

Off-Road All-Terrain

Adventure-ready traction for both trails and pavement

Toyo Open Country A/T III

Treadwear: None

255/50R20 -1", -20mm 255/55R20 -1", -20mm 265/50R20 -1", -10mm

General Grabber A/TX

Treadwear: None

265/50R20 -1", -10mm

Rugged All-Terrain

Aggressive off-road capability with acceptable on-road manners

Cooper Discoverer Rugged Trek

Treadwear: None

265/50R20 -1", -10mm

Nitto Ridge Grappler

Treadwear: None

265/50R20 -1", -10mm 285/50R20 -1", +10mm

Toyo Open Country R/T Trail

Treadwear: None

265/50R20 -1", -10mm

How to Use This Information

Stay within 3%: All listed tire sizes maintain proper speedometer accuracy and vehicle dynamics
Consider aspect ratio: Lower numbers mean shorter sidewalls (better handling, harsher ride)
Treadwidth matters: Wider tires typically offer more grip but may reduce fuel economy
Check clearance: Ensure your vehicle has adequate wheel well and suspension clearance

Want to look up compatibility for a different tire size? Use our tire size compatibility lookup

275/45R21 Compatible Tire Sizes

275/45R21 Specifications

20" Wheel Diameter

21" Wheel Diameter (Original)

22" Wheel Diameter

Current Tire Pricing

Tire Recommendations

Max Performance Summer

Michelin Pilot Sport 4S

Vredestein Ultrac Pro

Bridgestone Potenza Sport

Ultra High Performance All-Season

Continental ExtremeContact DWS 06 Plus

Michelin Pilot Sport All Season 4

Grand Touring All-Season

Michelin CrossClimate2

Vredestein Quatrac Pro+

Continental SecureContact AW

Goodyear Assurance WeatherReady2

On-Road All-Terrain

Bridgestone Dueler A/T Ascent

Cooper Discoverer Road+Trail AT

Falken WildPeak A/T Trail

Nitto Nomad Grappler

Vredestein Pinza AT

Yokohama Geolandar A/T4

Off-Road All-Terrain

Toyo Open Country A/T III

General Grabber A/TX

Rugged All-Terrain

Cooper Discoverer Rugged Trek

Nitto Ridge Grappler

Toyo Open Country R/T Trail

How to Use This Information