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T125/70D17 Tire Size
Shop T125/70D17 tires in stock with confirmed size specs, validated diameter in inches, approved rim width range, and verified vehicle fitment before purchase.
Browse and filter T125/70D17 tires from Yokohama, Falken and more to quickly find your ideal fit.
T125/70D17 Spare Tire: Compact Donut Spare Size Explained
T125/70D17 is a compact temporary spare (commonly called a "donut spare") measuring 125 mm wide with a 70% aspect ratio for a 17-inch wheel - designed exclusively for emergency use until a flat tire can be repaired or replaced.
T125/70D17 size is one of the most common compact spare fitments on modern passenger cars and crossovers with 17-inch wheels.
T125/70D17 Quick Specs
Spec | Value |
Section width | 125 mm (~4.9") |
Aspect ratio | 70% |
Wheel diameter | 17" |
Construction | Diagonal (bias-ply) |
Approximate overall diameter | 24.2"–24.4" |
Required inflation pressure | 60 psi |
Maximum speed | 50 mph (80 km/h) |
Maximum recommended distance | ~50 miles |
Category | Temporary spare (T-type) |
What Each Part of the T125/70D17 Size Means
- T - Temporary-use spare tire
- 125 - Section width in millimeters
- 70 - Aspect ratio (sidewall height is 70% of section width)
- D - Diagonal (bias-ply) construction
- 17 - Wheel diameter in inches
Critical Usage Limits for T125/70D17
T125/70D17 Speed limit: 50 mph hard maximum. This is not a suggestion - temporary spare tires are not designed for highway speeds. Exceeding 50 mph risks tire failure.
T125/70D17 Inflation pressure: 60 psi. Compact spares require significantly higher pressure than regular tires. Check pressure before every use.
T125/70D17 Distance: approximately 50 miles to a repair facility, per general industry guidance. This tire is not intended for extended driving.
How Fast Can You Drive on a T125/70D17?
The maximum safe speed is exactly 50 mph (80 km/h). This is a hard structural limit, not a conservative recommendation. Driving faster risks heat buildup and potential sudden tire failure. Always drive directly to the nearest repair facility.
Can T125/70D17 Replace a Regular Tire Permanently?
No. Compact spare tires, such as T125/70D17, are narrower and shorter than regular tires, which affects braking, handling, and vehicle stability. Running a T125/70D17 as a permanent tire also creates a load and diameter mismatch with the three remaining tires. Use it only to reach a repair facility.
T125/70D17 vs 125/70R17: What's the Difference?
Both T125/70D17 and 125/70R17 sizes share identical dimensions. The only difference is construction: T125/70D17 uses diagonal (bias-ply) construction, while 125/70R17 uses radial construction. Both are temporary spare tires subject to the same 50 mph / 60 psi limits.
T125/70D17 Spare Tire: Compact Donut Spare Size Explained
T125/70D17 is a compact temporary spare (commonly called a "donut spare") measuring 125 mm wide with a 70% aspect ratio for a 17-inch wheel - designed exclusively for emergency use until a flat tire can be repaired or replaced.
T125/70D17 size is one of the most common compact spare fitments on modern passenger cars and crossovers with 17-inch wheels.
T125/70D17 Quick Specs
Spec | Value |
Section width | 125 mm (~4.9") |
Aspect ratio | 70% |
Wheel diameter | 17" |
Construction | Diagonal (bias-ply) |
Approximate overall diameter | 24.2"–24.4" |
Required inflation pressure | 60 psi |
Maximum speed | 50 mph (80 km/h) |
Maximum recommended distance | ~50 miles |
Category | Temporary spare (T-type) |
What Each Part of the T125/70D17 Size Means
- T - Temporary-use spare tire
- 125 - Section width in millimeters
- 70 - Aspect ratio (sidewall height is 70% of section width)
- D - Diagonal (bias-ply) construction
- 17 - Wheel diameter in inches
Critical Usage Limits for T125/70D17
T125/70D17 Speed limit: 50 mph hard maximum. This is not a suggestion - temporary spare tires are not designed for highway speeds. Exceeding 50 mph risks tire failure.
T125/70D17 Inflation pressure: 60 psi. Compact spares require significantly higher pressure than regular tires. Check pressure before every use.
T125/70D17 Distance: approximately 50 miles to a repair facility, per general industry guidance. This tire is not intended for extended driving.
How Fast Can You Drive on a T125/70D17?
The maximum safe speed is exactly 50 mph (80 km/h). This is a hard structural limit, not a conservative recommendation. Driving faster risks heat buildup and potential sudden tire failure. Always drive directly to the nearest repair facility.
Can T125/70D17 Replace a Regular Tire Permanently?
No. Compact spare tires, such as T125/70D17, are narrower and shorter than regular tires, which affects braking, handling, and vehicle stability. Running a T125/70D17 as a permanent tire also creates a load and diameter mismatch with the three remaining tires. Use it only to reach a repair facility.
T125/70D17 vs 125/70R17: What's the Difference?
Both T125/70D17 and 125/70R17 sizes share identical dimensions. The only difference is construction: T125/70D17 uses diagonal (bias-ply) construction, while 125/70R17 uses radial construction. Both are temporary spare tires subject to the same 50 mph / 60 psi limits.
FAQ
Can T125/70D17 be used on an AWD or 4WD vehicle?
How far can you drive on a T125/70D17?
Is T125/70D17 the same as 125/70R17?
What inflation pressure does T125/70D17 require?
What is the speed limit for T125/70D17?
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