2021 Volvo XC40 — T4 Momentum
The 2021 Volvo XC40 T4 Momentum shipped with 4 different factory tire sizes, depending on the wheel package it left the factory with (this can also reflect a staggered front/rear setup). Check your tire sidewall or door placard to confirm which one applies to your vehicle.
This trim shipped with more than one tire size (staggered fitment, front/rear, or optional wheel package). Confirm which one matches your vehicle by checking your tire sidewall or door placard.
235/55R18
| Section width | 235 mm |
|---|---|
| Aspect ratio (sidewall height) | 55% (129.3 mm) |
| Rim diameter | 18" |
| Overall tire diameter | ~28.2" |
| Revolutions per mile | ~716 |
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235/50R19
| Section width | 235 mm |
|---|---|
| Aspect ratio (sidewall height) | 50% (117.5 mm) |
| Rim diameter | 19" |
| Overall tire diameter | ~28.3" |
| Revolutions per mile | ~714 |
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245/45R20
| Section width | 245 mm |
|---|---|
| Aspect ratio (sidewall height) | 45% (110.3 mm) |
| Rim diameter | 20" |
| Overall tire diameter | ~28.7" |
| Revolutions per mile | ~703 |
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245/40R21
| Section width | 245 mm |
|---|---|
| Aspect ratio (sidewall height) | 40% (98 mm) |
| Rim diameter | 21" |
| Overall tire diameter | ~28.7" |
| Revolutions per mile | ~702 |
Compare prices at:
What this size means for your Volvo XC40
On the 2021 Volvo XC40 T4 Momentum, the factory 235/55R18 measures about 28.2″ in overall diameter with a 129.3 mm (5.1″) sidewall, and completes roughly 716 revolutions per mile. Its 55-series aspect ratio gives a balanced everyday-passenger profile — enough sidewall to soak up road shock while keeping steering response crisp. In tire terms it is a passenger (P-metric / Euro-metric) size.
The 235/55R18 and 235/50R19 roll within 0.1″ (0.4%) of each other in overall diameter, so they are interchangeable from a speedometer standpoint — the second size is an optional wheel package rather than a different rolling size.
Other 2021 Volvo XC40 trims
- Recharge 235/50R19 (Front) / 255/45R19 (Rear) / 235/45R20 (Front) / 255/40R20 (Rear)
- T4 Inscription 235/55R18 / 235/50R19 / 245/40R21
- T4 R-Design 235/50R19 / 245/45R20 / 245/40R21
- T5 Inscription 235/55R18 / 235/50R19 / 245/40R21
- T5 Momentum 235/55R18 / 235/50R19 / 245/45R20 / 245/40R21
- T5 R-Design 235/50R19 / 245/45R20 / 245/40R21
Volvo XC40 tire sizes by year
- 2026 Volvo XC40 235/55R18 / 235/50R19
- 2025 Volvo XC40 235/55R18 / 235/50R19 / 245/40R21
- 2024 Volvo XC40 235/55R18 / 235/50R19
- 2023 Volvo XC40 235/55R18
- 2022 Volvo XC40 235/50R19 (Front) / 255/45R19 (Rear) / 235/45R20 (Front) / 255/40R20 (Rear)
- 2020 Volvo XC40 235/55R18 / 235/50R19 / 245/40R21
- 2019 Volvo XC40 235/55R18 / 235/50R19 / 245/45R20 / 245/40R21
How to read a tire size
A tire size like 225/45R17 breaks down into three parts:
the first number is the section width in millimeters
(the tire's width from sidewall to sidewall), the second is the
aspect ratio — the sidewall's height as a percentage of
that width — and the number after the "R" is the rim
diameter in inches. A letter prefix (P or LT) indicates
Passenger or Light Truck construction; its absence usually means
Euro-metric sizing.
Some trucks and off-road tires instead use "flotation" sizing, like
37X12.50R17 — here the numbers are the tire's overall
diameter and width in inches directly, with the rim diameter last.
Always verify against the tire information placard on your driver's-side door jamb or your owner's manual before purchasing — tire size can vary by factory option package even within the same trim.