Bridgestone

Driveguard Plus

Name: Bridgestone Driveguard Plus 285/45R21 XL
Brand: Bridgestone
SKU: 020058
Price: 366.74 USD
Availability: InStock

285/45R21 XL

All-Season Run-flat M+S

$366.74/tire $488.99

Set of 4: $1466.96

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Specifications

Size	285/45R21 XL Driveguard Plus Run Flat
Width	285 mm
Aspect ratio	45
Rim diameter	R21
Load index	113
Speed rating	H
Load range	XL

Season	All-Season
UTQG	640 A A
Treadwear warranty	65,000 miles
Tread depth	9/32"
Weight	49.1 lbs
Severe snow (3PMSF)	No
Run-flat	Yes

About the Bridgestone Driveguard Plus

All-Season Passenger Car Touring tire with Run Flat Technology.

Features

* Full depth sipe technology* Open shoulder slots* Asymmetric pattern and inboard design* Full depth main grooves* 65,000 Mile Limited Treadwear Warranty

Benefits

* Helps improve wear and snow performance* Helps reduce the chance of hydroplaning when tires are worn* Delivers confident handling and a quiet ride* Provide consistent water evacuation

Understanding the 285/45R21 XL size

In the size code 285/45R21, 285 is the section width in millimetres (about 11.2"). 45 is the aspect ratio — the sidewall height is 45% of the width, or roughly 128.3 mm. R21 means radial construction on a 21-inch wheel, giving an approximate overall diameter of 31.1".

The load index 113 means each tire supports up to 2,535 lbs — about 10,140 lbs across a full set of four. The speed symbol H certifies the tire to 130 mph under its rated load. Always match or exceed the load index and speed rating listed on your vehicle's door-jamb placard.

What the Bridgestone Driveguard Plus is built for

The Bridgestone Driveguard Plus is an all-season tire, balancing dry grip, wet traction and tread life across spring, summer and autumn conditions. It carries an M+S (mud and snow) marking for light winter service. Run-flat construction lets you keep driving a limited distance at reduced speed after a loss of pressure. Fitment category: Passenger Car, CAR, Performance, Touring.

Tread life and grip ratings

This tire carries a UTQG rating of 640 A A. The treadwear grade of 640 is a relative durability score — a grade of 200 is expected to last roughly twice as long as a grade of 100 under the same controlled test. Traction grade A measures straight-line wet stopping grip (AA is highest, then A, B and C). Temperature grade A reflects heat resistance at sustained speed (A is highest).

Price and value

At $366.74 per tire, a full set of four costs $1466.96. That is about 8% below the average price of the 44 tires we stock in this size. Backed by a 65,000-mile treadwear warranty, that works out to roughly $22.57 per 1,000 miles across the set.

Frequently asked questions

What does the tire size 285/45R21 mean?

285 is the section width in millimetres, 45 is the aspect ratio (sidewall height as a percentage of width, about 128.3 mm), and R21 indicates radial construction for a 21-inch wheel. Overall diameter is approximately 31.1 inches.

What are the load and speed ratings of the Bridgestone Driveguard Plus 285/45R21 XL?

Its load index of 113 allows up to 2,535 lbs per tire. Its speed rating of H is certified to 130 mph. Check your door-jamb placard and do not fit a tire rated below the vehicle's requirement.

How much does a set of 4 Bridgestone Driveguard Plus 285/45R21 XL tires cost?

A single tire is $366.74 and a set of four is $1466.96, covered by a 65,000-mile treadwear warranty.

Is the Bridgestone Driveguard Plus a run-flat tire?

Yes. Run-flat construction supports the vehicle for a limited distance at reduced speed after a loss of air pressure, so you can reach a service point without an immediate roadside change.

Does the Driveguard Plus come in other sizes?

Yes — we stock 39 additional Driveguard Plus sizes besides 285/45R21 XL. Fit only a size approved for your vehicle.