Everything you need to know about the 255/40R18 Continental ContiWinterContact TS 860 S – SSR – 3PMS Run-Flat Winter is on this page — what the size means, load and speed ratings, certifications like 3PMS and XL, which vehicles it fit, and how we ship to Ontario and Quebec.
Is the 255/40R18 Continental ContiWinterContact TS 860 S – SSR – 3PMS Run-Flat right for you?
255/40R18 Continental ContiWinterContact TS 860 S – SSR – 3PMS Run-Flat is a winter / passenger fitment tire, with Ontario and Quebec delivery details on this page.
Free shipping • 1–3 business days (Ontario and Quebec)OutofstockOntario & Quebec focusedFull specs, fitment, and FAQ on page
A good fit if you
Cold weather, snow, and ice — the conditions this tire is specifically engineered for.
Drivers who want the best cold-weather performance and won’t compromise with all-seasons.
Factory fitments or vehicles that specifically require XL-rated tires.
Electric vehicles, where battery weight, instant torque, and road noise put extra demands on the tire.
Think twice if you need
Summer use — winter compound softens too much in heat, wearing faster and handling worse.
Buying option
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Lowest sticker price
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Transparent Ontario and Quebec delivery details, fitment context, and product-specific FAQ on every page.
Quick Specs
Size: 255/40R18
Brand / Model: Continental ContiWinterContact TS 860 S – SSR – 3PMS Run-Flat
Season: Winter
Vehicle Type: Passenger
EV Compatible: Yes
Load / Speed: 99V (Load index 99 supports up to 775 kg per tire; speed rating V rated up to 240 km/h)
Certifications: 3PMSF severe snow service, XL (Extra Load)
Delivery (Ontario & Quebec): Free shipping • 1–3 business days (Ontario and Quebec)
255/40R18 Continental ContiWinterContact TS 860 S – SSR – 3PMS Run-Flat Winter
Carries the 3PMSF symbol — tested and rated for severe snow service. XL (Extra Load) — built to handle higher inflation pressures and heavier loads than a standard-load tire of the same size.
What these tire specs mean
Load index 99 means each tire can carry up to 775 kg. Check your door jamb placard — the tire needs to meet or beat the load rating your manufacturer specifies.
Speed rating V is the maximum sustained speed this tire is designed to handle under proper conditions. That works out to 240 km/h under correct load and inflation — not a target, just the rated ceiling.
Winter tires use a softer compound that stays pliable in cold temperatures, where all-season rubber starts to harden. They carry the 3PMS symbol and meet Quebec’s winter tire mandate.
XL means Extra Load. These tires run at higher inflation pressures and handle more weight than a standard-load tire of the same size. If your vehicle’s factory spec calls for XL, that’s what you need — swapping to standard load can affect ride, handling, and safety.
EV Compatible means the tire is designed with electric vehicle demands in mind — higher load capacity for battery weight, reinforced sidewalls for EV torque, and compound choices that balance rolling resistance and road noise.
3PMS stands for Three Peak Mountain Snowflake — a symbol earned by meeting specific severe snow traction standards in testing. It is the mark Quebec requires for winter tire compliance.
Vehicle type indicates the service category this tire is built for — passenger car, light truck, commercial, or other. Matching the right category matters for load capacity, handling, and safety.
Where this tire fits in
The 255/40R18 Continental ContiWinterContact TS 860 S – SSR – 3PMS Run-Flat is a winter tire, built around a 255 mm section width for a 18-inch wheel.
In practical terms, this size gives you a 40-series sidewall of about 102 mm paired with a 18-inch wheel diameter — confirm this against your current tire’s sidewall marking before ordering.
Worth noting on the spec side: this tire carries 3PMS certification for severe snow service, an XL extra load rating, load index 99 and speed rating V (~240 km/h).
About the 255/40R18 tire size
The 255/40R18 breaks down into three numbers:
255 — tread width in millimetres, measured across the contact patch
40 — sidewall height as a percentage of the tread width (roughly 102 mm of rubber between road and rim)
R18 — radial construction, for a 18-inch wheel
The 255/40R18 size is commonly found on mid size SUVs, crossovers, and sport sedans. Replacing a set? The full size marking is on your current tire’s sidewall — confirm width, profile, and rim diameter all match before you order.
What stands out — Continental ContiWinterContact TS 860 S – SSR – 3PMS Run-Flat 255/40R18
Carries the 3PMSF symbol — tested and rated for severe snow traction.
XL (Extra Load) rated — handles higher inflation pressures and heavier loads than a standard-load equivalent.
Marked as EV compatible — designed with EV load, torque, and road noise characteristics in mind.
Service description 99V: load index 99 means each tire carries up to 775 kg, speed rating V is rated to 240 km/h.
Ontario & Quebec — winter tire rules
In Quebec, winter tires are mandatory on all passenger vehicles from December 1 to March 15 — it’s the law under the Highway Safety Code, not a suggestion. In Ontario, they’re strongly recommended through the cold months, and most insurance providers give you a premium discount when you run them. The 255/40R18 Continental ContiWinterContact TS 860 S – SSR – 3PMS Run-Flat is a Winter tire with the 3PMSF symbol, so it qualifies for Quebec’s winter mandate.
Vehicles that fit 255/40R18 tires
Based on our fitment database, this size is used on:
2022–2024 BMW 230i
2021–2024 BMW M440i
2021–2024 Toyota Supra
2020–2024 BMW M340i
2019–2024 BMW Z4
2017–2018 BMW 330e
2017–2019 BMW 330i
2017–2020 BMW 430i
2017–2020 BMW 440i
2017–2021 Mercedes-Benz C63
More vehicles that fit this size
2017 Mercedes-Benz SL450
2016–2018 BMW 340i
2016–2017 Mercedes-Benz CLS400
2016 Mercedes-Benz SL400
2015–2018 BMW M3
2015–2020 BMW M4
2014–2018 BMW 328d
2014–2016 BMW 428i
2014–2016 BMW 435i
2013–2018 BMW 320i
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Pick your year, make, model, and trim — we’ll show you everything we carry that fits, with Ontario and Quebec delivery details:
Common questions — 255/40R18 Continental ContiWinterContact TS 860 S – SSR – 3PMS Run-Flat Winter
What does the 255/40R18 tire size mean?
Break it down and 255/40R18 tells you three things: the tread is 255 mm wide, the sidewall stands at 40% of that — about 102 mm of rubber between road and rim — and it fits a 18-inch wheel. You’ll find this size most often on mid size SUVs, crossovers, and sport sedans.
Is the 255/40R18 Continental ContiWinterContact TS 860 S – SSR – 3PMS Run-Flat a Winter tire?
Yes — the 255/40R18 Continental ContiWinterContact TS 860 S – SSR – 3PMS Run-Flat is categorized as a Winter tire. In Quebec, that’s the law — mandatory from December 1 to March 15 under the Highway Safety Code. In Ontario it’s strongly recommended, and most insurance providers offer a premium discount when you run dedicated winter rubber.
What does the 99V rating mean on the 255/40R18 Continental ContiWinterContact TS 860 S – SSR – 3PMS Run-Flat?
The 99V on the Continental ContiWinterContact TS 860 S – SSR – 3PMS Run-Flat breaks into two numbers: load index 99, meaning each tire carries up to 775 kg, rated to approximately 240 km/h; and speed rating V, rated to 240 km/h under proper load and inflation. Your door jamb placard lists the minimum ratings your vehicle requires — match or exceed both.
Is the 255/40R18 Continental ContiWinterContact TS 860 S – SSR – 3PMS Run-Flat 3PMS rated?
Yes — like all proper winter tires, the Continental ContiWinterContact TS 860 S – SSR – 3PMS Run-Flat carries the 3PMSF symbol. It’s been tested for severe snow traction and meets Quebec’s winter tire mandate.
Is the 255/40R18 Continental ContiWinterContact TS 860 S – SSR – 3PMS Run-Flat studdable?
Studdable status is not confirmed for this tire. Reach out and we’ll check the manufacturer specs for you.
Does the 255/40R18 Continental ContiWinterContact TS 860 S – SSR – 3PMS Run-Flat support run flat driving?
No — the Continental ContiWinterContact TS 860 S – SSR – 3PMS Run-Flat is a standard tire, not a run flat. If your vehicle came equipped with run flats, your replacement set needs to be run flat-capable too.
Is the 255/40R18 Continental ContiWinterContact TS 860 S – SSR – 3PMS Run-Flat an XL (extra load) tire?
Yes — the Continental ContiWinterContact TS 860 S – SSR – 3PMS Run-Flat is XL rated. It’s designed for higher inflation pressures and greater load capacity than a standard-load tire of the same size. If your current tires are XL, your replacement should be too.
What does speed rating V mean on the 255/40R18 Continental ContiWinterContact TS 860 S – SSR – 3PMS Run-Flat?
Speed rating V on the Continental ContiWinterContact TS 860 S – SSR – 3PMS Run-Flat corresponds to a maximum sustained speed of 240 km/h under proper load and inflation. In practice, this tells you the performance category the tire is built for — not a number to chase on public roads.
Can I order the 255/40R18 Continental ContiWinterContact TS 860 S – SSR – 3PMS Run-Flat with delivery to Ontario or Quebec?
Yes — we ship the 255/40R18 Continental ContiWinterContact TS 860 S – SSR – 3PMS Run-Flat across Ontario and Quebec. Free shipping • 1–3 business days (Ontario and Quebec).
Why buy the 255/40R18 Continental ContiWinterContact TS 860 S – SSR – 3PMS Run-Flat from XYZTires if another tire looks cheaper?
A lower sticker price is worth comparing, but the full picture includes shipping cost, delivery timeline, whether it’s actually in stock, and whether the tire category is right for how you drive. We focus on making those details clear upfront — so you can compare real delivered value, not just the first number you see.
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