Which tire is taller, 245/60 R18 or 245/70 R16?

245/60 R18 is taller by 1.8 mm (0.24%) compared with 245/70 R16.

What is the diameter difference between 245/60 R18 and 245/70 R16?

245/60 R18 measures 751 mm overall diameter, 245/70 R16 measures 749 mm — a difference of 1.8 mm (0.24%).

How much speedometer error does this change create?

Switching from 245/60 R18 to 245/70 R16 changes the speedometer reading by -0.24%. At an indicated 100 km/h, your true speed becomes about 99.8 km/h.

Is 245/70 R16 a safe replacement for 245/60 R18?

Within ±3% diameter — generally considered a safe replacement from a speedometer-error standpoint, provided wheel offset, rim width and clearance also match your vehicle.

What else should I check before changing tire size?

Beyond diameter and speedometer error, verify wheel offset (ET), rim width, hub bore, load index, brake and suspension clearance, and your vehicle's manufacturer specification. Local regulations may also limit how far you can deviate from OEM.

Fitment comparison

245/60 R18versus245/70 R16

Δ Ø -1.8 mmSpeedo -0.24%OEM-safe

245/70 R16 is shorter than 245/60 R18 — quicker gearing feel, tighter arch gap, livelier throttle response.

Minus-sizing from 245/60 R18 to 245/70 R16 pairs a smaller 16-inch wheel with more rubber between the rim and road. This tire combination lands within OEM rolling-diameter tolerance.

Speedometer error is effectively zero, so ABS and traction control read the road as they did from the factory. The taller sidewall adds cushioning over potholes and rougher roads, with a softer overall ride. The smaller wheel is also lighter and easier to find affordable winter rubber for. Diameter change stays inside the conservative ±3% safety window — an OEM-safe fitment on most vehicles.

TakeTypical choice for a dedicated winter or off-road setup where extra sidewall pays off.

Quick fitment verdict

245/60 R18 → 245/70 R16 at a glance

OEM Safe

Within ±3%

Inside factory tolerance — ABS, ESP and cruise control stay calibrated.

Fender Clearance

Clears fender

Width and diameter stay close to stock — arch clearance unchanged.

Speedometer Impact

-0.24%

At a true 100 km/h the dash reads 99.8 km/h — negligible.

Daily Driving

Drop-in swap

Geometry stays in OEM envelope — no surprises in traffic or on the highway.

Side-by-side telemetry

Dimensional read-out

Current

245/60 R18

Diameter: 751.2 mm
Sidewall: 147.0 mm
Wheel: 18″
Width: 245 mm

Δ delta

Ø -1.8 mm

SW +24.5 mm

RH -0.9 mm

NewNew

245/70 R16

Diameter: 749.4 mm
Sidewall: 171.5 mm
Wheel: 16″
Width: 245 mm

Real-world effects

How this swap actually feels

Steering response
30/100 · Softer turn-in
Ride comfort
90/100 · More cushion
Fuel economy
69/100 · Unchanged
Highway cruising
59/100 · Higher cruise revs
Pothole resistance
88/100 · More wheel protection

Shareable card

Generate fitment card

Export a garage-grade telemetry card of this comparison — perfect for forums, Reddit and Discord.

Ride height

Lower stance

-0.9 mm

Chassis drops — tighter arch gap, more aggressive stance.

New tire drops ride height by ~0.9 mm — tighter arch gap, lower stance.

Suspension travel · arch clearance

Wheel gap

Wheel gap stays virtually unchanged

-0.9 mm

How the arch-to-tire gap reads from across the parking lot — the visual stance change everyone notices first.

245/60 R18

245/70 R16

Wheel-gap Δ-0.9 mm

Static · unloaded chassis

Fender relationship

Tucked · Flush · Poke

Stance language

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 99.8 km/h

-0.24%

Shorter rubber: dashboard reads conservatively low — you're slower than it claims.

ABS · ESP · cruise control

Setup telemetry

How this setup changes the car

Driver-perspective read-out of the 245/60 R18 → 245/70 R16 swap — steering, comfort, stance and dash behavior in plain enthusiast language.

Steering feel

+24.5 mm sidewall

Softer, more relaxed turn-in

Taller sidewall flexes a touch more before loading the contact patch — calmer, comfort-tuned.

Ride firmness

60% → 70%

Softer over potholes and joints

Bumps and expansion joints are absorbed better — a comfort win for daily driving.

Fender relationship

+0 mm width

Fender gap reads near-identical

Width delta is too small to change stance — same visual signature as OEM.

Speedometer behavior

-0.24%

OEM-safe speedometer reading

Inside the factory ±3% tolerance — ABS, ESP and cruise control behave as designed.

Daily drivability

Ø -1.8 mm

Drop-in swap, daily-safe

Geometry stays in the OEM envelope — no surprises in traffic, parking or on the highway.

Direct answer

Is 245/70 R16 OEM-safe?

Yes. Overall diameter changes by -0.24% versus 245/60 R18. OEM-safe. Speedometer, ABS, ESP and gearing remain inside the factory tolerance.

Direct answer

Will 245/70 R16 rub?

Unlikely. Width changes by +0 mm and diameter by -1.8 mm. Very unlikely to rub with OEM wheel offset.

Direct answer

Does the speedometer change?

Yes — by -0.24%. Swapping 245/60 R18 for 245/70 R16 changes overall diameter, so at an indicated 100 km/h your true speed becomes 99.8 km/h. That's within the ±3% OEM tolerance — no recalibration needed.

Direct answer

Does lower sidewall affect comfort?

Yes — softer ride. Sidewall changes by +24.5 mm (60% → 70%). Ride softens and absorbs bumps better, with slightly less precise turn-in.

Current Tire

245/60R18

Width

Ratio

Rim

New Tire

245/70R16

Width

Ratio

Rim

Fitment · Scaled comparison

● Excellent fit

245/60 R18

Diameter

-1.8 mm

-0.24%

Sidewall

+24.5 mm

Speedometer

99.8 km/h

at true 100

Clearance

Excellent fit

245/70 R16

Ground line · Scaled comparison

Excellent Fit

Within ±3% — safe for daily driving

Diameter change

-1.8 mm

-0.24%

Speedometer at 100

99.8 km/h

-0.24% error

Ground clearance

-0.9 mm

ride height delta

Sidewall change

+24.5 mm

revs/km: 424.8

Open visual comparisonCompare visually

Permalink for this comparison:

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Detailed comparison

Metric	245/60 R18	245/70 R16	Difference
Overall diameter	751.2 mm	749.4 mm	-1.8 mm (-0.24%)
Sidewall height	147.0 mm	171.5 mm	+24.5 mm
Circumference	2.360 m	2.354 m	-5.7 mm
Revs / km	423.7	424.8	+1.0
Ground clearance	reference	-0.9 mm	-0.9 mm
Speedometer @ 100 km/h	100.0 km/h	99.8 km/h	-0.24 km/h

Verdict: excellent

Within ±3% — speedometer, ABS and traction control should behave normally.

Dimensional comparison

Side-by-side

Scaled 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

245/60 R18

Profile: 60%
Circumference: 2.360 m

New

245/70 R16

Profile: 70%
Circumference: 2.354 m

Side-by-side fitment

Geometry

Current

245/60 R18

Section width: 245 mm
Aspect ratio: 60%
Sidewall: 147.0 mm
Wheel diameter: 18″(457 mm)
Overall diameter: 751.2 mm(29.57″)
Circumference: 2.360 m
Revs / km: 423.7

New

245/70 R16

Section width: 245 mm
Aspect ratio: 70%
Sidewall: 171.5 mm
Wheel diameter: 16″(406 mm)
Overall diameter: 749.4 mm(29.50″)
Circumference: 2.354 m
Revs / km: 424.8

Real-world consequences

Pros / cons

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

-2″ rim downsize

Wheel diameter

Cheaper winter / track tire sizing
Lighter overall package, less unsprung mass
More sidewall = more impact absorption
Less aggressive stance
Possible brake caliper clearance issue going too small

How it changes driving feel

Seat-of-the-pants

Steering 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 tolerance

Speedometer impact

At a true 100 km/h, your dashboard will read 99.8 km/h after switching to 245/70 R16 — a -0.24% 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 -0.9 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

245/60 R18

Back to

245/70 R16

Drivers also compare

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245/60 R18 vs 265/60 R18

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235/55 R18 vs 245/60 R18

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Δ 4.96%

245/60 R18 vs 245/65 R17

Popular +1 inch upgrade with minimal speedometer change.

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Δ 0.12%

245/60 R18 vs 275/45 R20

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245/60 R18 vs 295/40 R20

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Δ 0.96%

245/60 R18versus245/70 R16

Generate fitment card

Softer, more relaxed turn-in

Softer over potholes and joints

Fender gap reads near-identical

OEM-safe speedometer reading

Drop-in swap, daily-safe

Is 245/70 R16 OEM-safe?

Will 245/70 R16 rub?

Does the speedometer change?

Does lower sidewall affect comfort?

Detailed comparison

Verdict: excellent

Taller sidewall (+10% aspect)

-2″ rim downsize

Speedometer impact

Ground clearance change

Drivers also compare

Frequently asked questions

Which tire is taller, 245/60 R18 or 245/70 R16?

What is the diameter difference between 245/60 R18 and 245/70 R16?

How much speedometer error does this change create?

Is 245/70 R16 a safe replacement for 245/60 R18?

What else should I check before changing tire size?