OEM Safe
Within ±3%
Inside factory tolerance — ABS, ESP and cruise control stay calibrated.
Fitment comparison
175/70 R13versus155/80 R13
Δ Ø +3.0 mmSpeedo +0.52%OEM-safe
155/80 R13 stands taller than 175/70 R13 — bigger rolling diameter, slightly more clearance, calmer cruise revs.
Going from 175/70 R13 to 155/80 R13 raises the aspect ratio by 10 points on the same 13-inch wheel. This tire combination preserves rolling diameter within a hair of the original.
Dashboard speed shifts only marginally — within the noise of normal OEM tolerance. The taller sidewall adds cushioning over potholes and rougher roads, with a softer overall ride. Less width usually means lower rolling resistance and easier chain or winter-tire fitment. Diameter change stays inside the conservative ±3% safety window — an OEM-safe fitment on most vehicles.
TakeA comfort-leaning direction that's easier on wheels and suspension over rough surfaces.
Quick fitment verdict
175/70 R13 → 155/80 R13 at a glance
Fender Clearance
Clears fender
Width and diameter stay close to stock — arch clearance unchanged.
Speedometer Impact
+0.52%
At a true 100 km/h the dash reads 100.5 km/h — negligible.
Daily Driving
Livable
Daily use is fine; expect a slightly different ride and cruise rev count.
Side-by-side telemetry
Dimensional read-out
Current
175/70 R13
- Diameter
- 575.2 mm
- Sidewall
- 122.5 mm
- Wheel
- 13″
- Width
- 175 mm
Δ delta
Ø +3.0 mm
SW +1.5 mm
RH +1.5 mm
NewNew
155/80 R13
- Diameter
- 578.2 mm
- Sidewall
- 124.0 mm
- Wheel
- 13″
- Width
- 155 mm
Real-world effects
How this swap actually feels
- Steering response58/100 · Softer turn-in
- Ride comfort62/100 · More cushion
- Fuel economy45/100 · Slightly lower drag
- Highway cruising62/100 · Lower cruise revs
- Pothole resistance57/100 · More wheel protection
Shareable card
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Export a garage-grade telemetry card of this comparison — perfect for forums, Reddit and Discord.
Ride height
Lifted stance
Chassis sits higher — slightly more clearance, wheel-gap visually grows.
New tire lifts the chassis by ~1.5 mm — more clearance, slightly more wheel-gap.
Suspension travel · arch clearance
Wheel gap
Wheel gap stays virtually unchanged
How the arch-to-tire gap reads from across the parking lot — the visual stance change everyone notices first.
175/70 R13
155/80 R13
Wheel-gap Δ+1.5 mm
Static · unloaded chassis
Fender relationship
Tucked · Flush · Poke
The visual relationship between the tire's outer edge and the fender lip — the lens enthusiasts use to judge a fitment.
Tucked
Inside fender
Flush
Lip-aligned
Poke
Outside fender
Width & offset dependent
Speedometer reality
Dash reads 100.5 km/h
Taller rubber: at a true 100 km/h your dashboard reads optimistically high.
ABS · ESP · cruise control
Setup telemetry
How this setup changes the car
Driver-perspective read-out of the 175/70 R13 → 155/80 R13 swap — steering, comfort, stance and dash behavior in plain enthusiast language.
Steering feel
+1.5 mm sidewallSteering response stays familiar
Sidewall delta is small; the wheel will feel like the OEM setup at the rim.
Ride firmness
70% → 80%Ride quality essentially unchanged
Comfort delta is below the perceivable threshold for most drivers.
Fender relationship
-20 mm widthMore tuck under the arch
Narrower contact patch tucks slightly inboard — cleaner look from the rear three-quarter.
Speedometer behavior
+0.52%OEM-safe speedometer reading
Inside the factory ±3% tolerance — ABS, ESP and cruise control behave as designed.
Daily drivability
Ø +3.0 mmLivable upgrade with minor trade-offs
Daily use is fine; expect a slightly different cruise rev count and a touch more road feel.
Direct answer
Is 155/80 R13 OEM-safe?
Yes. Overall diameter changes by +0.52% versus 175/70 R13. OEM-safe. Speedometer, ABS, ESP and gearing remain inside the factory tolerance.
Direct answer
Will 155/80 R13 rub?
Borderline. Width changes by -20 mm and diameter by +3.0 mm. Borderline — check fender lip and inner strut clearance under load.
Direct answer
Does the speedometer change?
Yes — by +0.52%. Swapping 175/70 R13 for 155/80 R13 changes overall diameter, so at an indicated 100 km/h your true speed becomes 100.5 km/h. That's within the ±3% OEM tolerance — no recalibration needed.
Direct answer
Does lower sidewall affect comfort?
Barely. Sidewall changes by +1.5 mm (70% → 80%). Comfort is essentially unchanged.
Current Tire
175/70R13
New Tire
155/80R13
Fitment · Scaled comparison
● Excellent fit
175/70 R13
Diameter
+3.0 mm
+0.52%
Sidewall
+1.5 mm
Speedometer
100.5 km/h
at true 100
Clearance
Excellent fit
155/80 R13
Ground line · Scaled comparison
Excellent Fit
Within ±3% — safe for daily driving
Diameter change
+3.0 mm
0.52%
Speedometer at 100
100.5 km/h
+0.52% error
Ground clearance
+1.5 mm
ride height delta
Sidewall change
+1.5 mm
revs/km: 550.5
Permalink for this comparison:
/compare/175-70-r13-vs-155-80-r13Detailed comparison
| Metric | 175/70 R13 | 155/80 R13 | Difference |
|---|---|---|---|
| Overall diameter | 575.2 mm | 578.2 mm | +3.0 mm (+0.52%) |
| Sidewall height | 122.5 mm | 124.0 mm | +1.5 mm |
| Circumference | 1.807 m | 1.816 m | +9.4 mm |
| Revs / km | 553.4 | 550.5 | -2.9 |
| Ground clearance | reference | +1.5 mm | +1.5 mm |
| Speedometer @ 100 km/h | 100.0 km/h | 100.5 km/h | +0.52 km/h |
Verdict: excellent
Within ±3% — speedometer, ABS and traction control should behave normally.
Dimensional comparison
Side-by-sideScaled engineering side-profile of both tires. Width, sidewall and overall diameter are dimensioned so you can see the change at a glance — without parsing the numbers.
Current
175/70 R13- Profile
- 70%
- Circumference
- 1.807 m
New
155/80 R13- Profile
- 80%
- Circumference
- 1.816 m
Side-by-side fitment
GeometryCurrent
175/70 R13- Section width
- 175 mm
- Aspect ratio
- 70%
- Sidewall
- 122.5 mm
- Wheel diameter
- 13″(330 mm)
- Overall diameter
- 575.2 mm(22.65″)
- Circumference
- 1.807 m
- Revs / km
- 553.4
New
155/80 R13- Section width
- 155 mm
- Aspect ratio
- 80%
- Sidewall
- 124.0 mm
- Wheel diameter
- 13″(330 mm)
- Overall diameter
- 578.2 mm(22.76″)
- Circumference
- 1.816 m
- Revs / km
- 550.5
Real-world consequences
Pros / consNarrower tire (-20 mm)
Section width- Better aquaplaning resistance
- Lower rolling resistance and slightly better MPG
- Quieter ride, less tramlining
- Lighter unsprung mass on the corner
- Less dry grip at the limit
- Smaller contact patch under hard braking
- Stance can look tucked or undersized
Taller sidewall (+10% aspect)
Sidewall- Plusher ride, better pothole and curb protection
- More forgiving on bad roads and trails
- Lower wheel-damage risk on impacts
- More sidewall flex, softer steering feel
- Slightly delayed turn-in response
How it changes driving feel
Seat-of-the-pantsSteering response
Softer, slower
Ride comfort
Plusher ride
Road noise
Similar cabin noise
Wet / aquaplaning
Comparable wet behavior
Fuel economy
Negligible change
Curb / pothole protection
More sidewall, more cushion
Cluster preview
Within toleranceSpeedometer impact
At a true 100 km/h, your dashboard will read 100.5 km/h after switching to 155/80 R13 — a +0.52% offset. Use the speedometer error calculator for any indicated speed, and the speedometer error guide for the full background.
Ground clearance change
The new tire's half-diameter changes ride height by +1.5 mm. Small differences are absorbed by suspension travel, but anything beyond ±10 mm can affect headlight aim, fender clearance and bump-stop margin. See the plus-sizing guide before committing.
Back to
175/70 R13
Back to
155/80 R13
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