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255/40R21 Kumho WS71 Winter

255/40R21 Kumho WS71 Winter

$312.00

In stock

SKU: KH 2305833
Tags: , ,

Additional information

Speed Index

Brand

width

profile

diameter

Load Index

Season

Vehicle Type

Passenger
Sidewall

Black Sidewall
XL

XL
Min Wheel Width

8.5
Max Wheel Width

10
Tread Depth

11
3PMS

3PMS

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Detailed specifications

Listed are full spes for this 255/40R21 Kumho WS71 Winter tire — including load/speed ratings, certifications (3PMS / studdable / run-flat / XL), UTQG treadwear/traction/temperature grading, and shipping details for Ontario and Quebec.

Why choose the 255/40R21 Kumho WS71?

255/40R21 Kumho WS71 is positioned as a winter / passenger fitment tire with clear Ontario and Quebec delivery details.

Free shipping • 1–3 business days (Ontario and Quebec)In stockOntario & Quebec delivery focusSpecs, fitment notes, and FAQ on page

Best fit if you want

  • Cold weather traction, snow performance, and Quebec winter tire compliance.
  • Drivers who want a dedicated winter set instead of stretching all seasons into winter.
  • Fitments that require XL (extra load) capacity.

Double-check if you need

  • Warm weather summer use or maximum tread life in hot conditions.
Buying optionWhat to compare
Lowest sticker price tiresCheck shipping, stock status, delivery timing, and whether the final landed cost is still lower after checkout.
XYZTires.comAssist with fitment context, Ontario/Quebec free delivery, and product specific FAQ.

Quick Specs

  • Size: 255/40R21
  • Brand / Model: Kumho WS71
  • Season: Winter
  • Vehicle Type: Passenger
  • Load / Speed: 102W (Load index 102 supports up to 850 kg per tire; speed rating W rated up to 270 km/h)
  • Certifications: 3PMSF severe snow service, XL (Extra Load)
  • Delivery (Ontario & Quebec): Free shipping • 1–3 business days (Ontario and Quebec)

3PMSF severe snow service rating indicated. XL (Extra Load) rating supports higher inflation pressure and carrying capacity than standard load tires.

What these tire specs mean

  • Load Index 102 is the tire’s standardized carrying capacity, supporting up to 850 kg per tire. Use it to confirm the tire meets or exceeds the load rating listed on your vehicle placard.
  • Speed Rating W indicates the tire’s maximum sustained speed capability under proper load and inflation. This is approximately 270 km/h under proper load and inflation.
  • Winter tires are built for cold weather traction and carry 3PMS for severe snow service.
  • XL means Extra Load. These tires are designed to carry higher loads at higher inflation pressures than a standard load tire in the same size, which matters for heavier vehicles, loaded vehicles, or factory fitments that require XL.
  • 3PMS is the Three Peak Mountain Snowflake symbol, confirming the tire meets recognized severe snow traction performance standards.
  • Vehicle Type helps identify whether the tire is intended for passenger, light truck, commercial, or similar service categories.

How this tire is positioned

255/40R21 Kumho WS71 is positioned as a winter tire built around a 255 mm section width and 21-inch wheel fitment.

In practical terms, this size combines a 40-series sidewall of about 102 mm with a 21-inch wheel diameter, which is useful when matching an existing tire size and wheel setup.

Feature wise, this tire indicates 3PMS certification for severe snow service, an XL extra load rating, load index 102 and speed rating W (~270 km/h).

About the 255/40R21 tire size

The 255/40R21 size breaks down as follows:

  • 255 — tread width in millimetres
  • 40 — sidewall height as a percentage of tread width (approx. 102 mm)
  • R21 — fits a 21-inch rim

The 255/40R21 size is commonly found on performance vehicles and heavy duty trucks. If you’re matching an existing set, confirm the full size marking on your sidewall before ordering.

Key features — Kumho WS71 in 255/40R21

  • 3PMSF severe snow service symbol present.
  • XL (Extra Load): designed for higher load capacity at higher inflation pressure than standard load tires.
  • Load/Speed: 102W — load index 102 supports up to 850 kg per tire, while speed rating W is rated up to 270 km/h.
  • Size: 255/40R21 (fits an 21-inch wheel).
Ontario & Quebec — winter tire information

In Quebec, winter tires are mandatory on all passenger vehicles from December 1 to March 15 under the Highway Safety Code. In Ontario, winter tires are strongly recommended during cold weather months and many insurance providers offer premium discounts for equipped vehicles. The 255/40R21 Kumho WS71 is a Winter tire bearing the 3PMSF severe snow service symbol, making it eligible to satisfy Quebec’s winter tire mandate.

Vehicles that commonly use 255/40R21 tires

Examples from our vehicle fitment lookup include:

  • 2024 BMW 750e
  • 2024 Mercedes-Benz S63
  • 2023–2024 BMW 740i
  • 2023–2024 BMW 760i
  • 2023–2024 BMW i7
  • 2023–2024 Genesis GV60
  • 2023–2024 Kia EV6
  • 2023–2024 Maserati Grecale
  • 2022–2024 Genesis GV70
  • 2021–2024 Alfa Romeo Stelvio
More vehicles that use this size
  • 2021–2024 Audi Q5
  • 2020–2024 BMW X3
  • 2020–2024 BMW X4
  • 2018–2024 Volvo XC60
  • 2017 Audi Q5
  • 2017 Mercedes-Benz GLC 300
  • 2017–2024 Mercedes-Benz GLC 43
  • 2016–2021 Rolls Royce Dawn
  • 2014–2024 Audi SQ5
  • 2014–2024 Rolls Royce Ghost

Find tires for your vehicle

Select your year, make, model, and trim to see all compatible tires available for delivery across Ontario and Quebec:

Shop more tires — Ontario & Quebec delivery

Frequently asked questions — 255/40R21 Kumho WS71 Winter

What does the 255/40R21 tire size mean?

The 255/40R21 size indicates a tread width of 255 mm, a sidewall ratio of 40% (approximately 102 mm tall), and a 21-inch rim diameter. This size is commonly found on performance vehicles and heavy duty trucks.

Is the 255/40R21 Kumho WS71 a Winter tire?

Yes — the 255/40R21 Kumho WS71 is categorized as a Winter tire. Winter tires are mandatory in Quebec from December 1 to March 15, and strongly recommended across Ontario during cold weather months.

What does the 102W rating mean on the 255/40R21 Kumho WS71?

On the 255/40R21 Kumho WS71, the service description 102W indicates a load index of 102 and a speed rating of W (approximately 270 km/h). The load index is the tire’s standardized carrying capacity, while the speed rating is the maximum sustained speed under proper load and inflation. Always match or exceed your vehicle manufacturer’s required load and speed ratings.

Is the 255/40R21 Kumho WS71 3PMS rated?

Yes — winter tires like the 255/40R21 Kumho WS71 have the 3PMSF (Three-Peak Mountain Snowflake) symbol for severe snow.

Is the 255/40R21 Kumho WS71 studdable?

This tire, 255/40R21 Kumho WS71 is not studdable. Contact us for any questions.

Does the 255/40R21 Kumho WS71 support run flat driving?

No — the 255/40R21 Kumho WS71 is not a run flat.

Is the 255/40R21 Kumho WS71 an XL (extra load) tire?

Yes — the 255/40R21 Kumho WS71 carries an XL (extra load) rating, enabling it to handle higher inflation pressures and greater load capacities than a standard load equivalent.

What does speed rating W mean on the 255/40R21 Kumho WS71?

Speed rating W on the 255/40R21 Kumho WS71 corresponds to a maximum sustained speed of approximately 270 km/h under full load. Always obey posted speed limits regardless of tire rating.

Can I order the 255/40R21 Kumho WS71 with delivery to Ontario or Quebec?

Yes — XYZTires ships the 255/40R21 Kumho WS71 to addresses across Ontario and Quebec. Free shipping • 1–3 business days (Ontario and Quebec).

Why buy the 255/40R21 Kumho WS71 from XYZTires if another tire looks cheaper?

A lower sticker price is only one part of the tire purchase. Compare the final delivered cost, shipping time, stock status, fitment details, and whether the tire category matches how you drive. XYZTires focuses on clear Ontario and Quebec delivery details, product specifications, and fitment context so you can compare the real delivered value, not just the first price you see.

Other available sizes — Kumho WS71

More Kumho WS71 sizes at XYZTires

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