Which tire is taller, 245/65 R17 or 315/55 R16?

315/55 R16 is taller by 2.6 mm (0.35%) compared with 245/65 R17.

What is the diameter difference between 245/65 R17 and 315/55 R16?

245/65 R17 measures 750 mm overall diameter, 315/55 R16 measures 753 mm — a difference of 2.6 mm (0.35%).

How much speedometer error does this change create?

Switching from 245/65 R17 to 315/55 R16 changes the speedometer reading by +0.35%. At an indicated 100 km/h, your true speed becomes about 100.3 km/h.

Is 315/55 R16 a safe replacement for 245/65 R17?

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

245/65 R17versus315/55 R16

Δ Ø +2.6 mmSpeedo +0.35%OEM-safe

315/55 R16 stands taller than 245/65 R17 — bigger rolling diameter, slightly more clearance, calmer cruise revs.

Switching from 245/65 R17 to 315/55 R16 steps down to a 16-inch wheel — a familiar move for winter and dedicated all-terrain sets. This sizing approach lands within OEM rolling-diameter tolerance. The shorter sidewall gives the tire a firmer, more responsive feel and sharpens steering input.

Speedometer error is effectively zero, so ABS and traction control read the road as they did from the factory. 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

245/65 R17 → 315/55 R16 at a glance

OEM Safe

Within ±3%

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

Fender Clearance

Likely rubs

Significantly wider/taller — rubbing risk on liners or fender lip is real.

Speedometer Impact

+0.35%

At a true 100 km/h the dash reads 100.3 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

245/65 R17

Diameter: 750.3 mm
Sidewall: 159.3 mm
Wheel: 17″
Width: 245 mm

Δ delta

Ø +2.6 mm

SW +14.0 mm

RH +1.3 mm

NewNew

315/55 R16

Diameter: 752.9 mm
Sidewall: 173.3 mm
Wheel: 16″
Width: 315 mm

Real-world effects

How this swap actually feels

Steering response
44/100 · Softer turn-in
Ride comfort
76/100 · More cushion
Fuel economy
4/100 · Slightly higher drag
Highway cruising
62/100 · Lower cruise revs
Pothole resistance
73/100 · 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

Lifted stance

+1.3 mm

Chassis sits higher — slightly more clearance, wheel-gap visually grows.

New tire lifts the chassis by ~1.3 mm — more clearance, slightly more wheel-gap.

Suspension travel · arch clearance

Wheel gap

Wheel gap stays virtually unchanged

+1.3 mm

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

245/65 R17

315/55 R16

Wheel-gap Δ+1.3 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 100.3 km/h

+0.35%

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 245/65 R17 → 315/55 R16 swap — steering, comfort, stance and dash behavior in plain enthusiast language.

Steering feel

+14.0 mm sidewall

Softer, more relaxed turn-in

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

Ride firmness

65% → 55%

Softer over potholes and joints

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

Fender relationship

+70 mm width

Wheel sits closer to the fender

Wider tire pushes the contact patch outboard — flusher stance, but verify fender lip clearance at full lock.

Speedometer behavior

+0.35%

OEM-safe speedometer reading

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

Daily drivability

Ø +2.6 mm

Livable 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 315/55 R16 OEM-safe?

Yes. Overall diameter changes by +0.35% versus 245/65 R17. OEM-safe. Speedometer, ABS, ESP and gearing remain inside the factory tolerance.

Direct answer

Will 315/55 R16 rub?

Possibly. Width changes by +70 mm and diameter by +2.6 mm. Possible rub at full lock or full suspension compression — verify fender lip and inner strut clearance before committing.

Direct answer

Does the speedometer change?

Yes — by +0.35%. Swapping 245/65 R17 for 315/55 R16 changes overall diameter, so at an indicated 100 km/h your true speed becomes 100.3 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 +14.0 mm (65% → 55%). Ride softens and absorbs bumps better, with slightly less precise turn-in.

Current Tire

245/65R17

Width

Ratio

Rim

New Tire

315/55R16

Width

Ratio

Rim

Fitment · Scaled comparison

● Excellent fit

245/65 R17

Diameter

+2.6 mm

+0.35%

Sidewall

+14.0 mm

Speedometer

100.3 km/h

at true 100

Clearance

Excellent fit

315/55 R16

Ground line · Scaled comparison

Excellent Fit

Within ±3% — safe for daily driving

Diameter change

+2.6 mm

0.35%

Speedometer at 100

100.3 km/h

+0.35% error

Ground clearance

+1.3 mm

ride height delta

Sidewall change

+14.0 mm

revs/km: 422.8

Open visual comparisonCompare visually

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Detailed comparison

Metric	245/65 R17	315/55 R16	Difference
Overall diameter	750.3 mm	752.9 mm	+2.6 mm (+0.35%)
Sidewall height	159.3 mm	173.3 mm	+14.0 mm
Circumference	2.357 m	2.365 m	+8.2 mm
Revs / km	424.2	422.8	-1.5
Ground clearance	reference	+1.3 mm	+1.3 mm
Speedometer @ 100 km/h	100.0 km/h	100.3 km/h	+0.35 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

245/65 R17

Profile: 65%
Circumference: 2.357 m

New

315/55 R16

Profile: 55%
Circumference: 2.365 m

Side-by-side fitment

Geometry

Current

245/65 R17

Section width: 245 mm
Aspect ratio: 65%
Sidewall: 159.3 mm
Wheel diameter: 17″(432 mm)
Overall diameter: 750.3 mm(29.54″)
Circumference: 2.357 m
Revs / km: 424.2

New

315/55 R16

Section width: 315 mm
Aspect ratio: 55%
Sidewall: 173.3 mm
Wheel diameter: 16″(406 mm)
Overall diameter: 752.9 mm(29.64″)
Circumference: 2.365 m
Revs / km: 422.8

Real-world consequences

Pros / cons

Wider tire (+70 mm)

Section width

More dry grip and cornering bite
Sharper steering response on initial turn-in
Bigger contact patch under braking
More road noise on coarse asphalt
Worse aquaplaning resistance in standing water
Higher rolling resistance, small MPG hit
Possible fender or strut contact at full lock

Lower profile (-10% aspect)

Sidewall

Sharper turn-in and less sidewall roll
More planted on smooth tarmac
Bigger brake / caliper visual real estate
Harsher ride over expansion joints and potholes
Higher wheel-damage risk on impacts
Less curb protection for the rim lip
More sensitive to correct tire pressure

-1″ 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

Sharper turn-in

Ride comfort

Harsher impacts

Road noise

Louder on coarse asphalt

Wet / aquaplaning

Reduced standing-water margin

Fuel economy

Small MPG penalty likely

Curb / pothole protection

Higher wheel-damage risk

Fitment risk check

Verify before install

Fender rubbing

Width jump >20 mm — verify fender lip and inner liner clearance at full lock.

Suspension clearance

Wider tire may contact strut or control arm on full compression.

Cluster preview

Within tolerance

Speedometer impact

At a true 100 km/h, your dashboard will read 100.3 km/h after switching to 315/55 R16 — a +0.35% 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 +1.3 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

245/65 R17

Back to

315/55 R16

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Δ 1.76%

225/65 R17 vs 245/65 R17

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Δ 3.59%

245/60 R18 vs 245/65 R17

Popular +1 inch upgrade with minimal speedometer change.

Δ 0.12%

245/65 R17 vs 245/70 R16

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Δ 0.12%

235/55 R19 vs 245/65 R17

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235/60 R18 vs 245/65 R17

Common +1 inch upgrade — slight diameter drift.

Δ 1.48%

245/65 R17 vs 255/55 R18

Common +1 inch upgrade — slight diameter drift.

Δ 1.68%

245/65 R17 vs 255/50 R19

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Δ 1.69%

245/65 R17versus315/55 R16

Generate fitment card

Softer, more relaxed turn-in

Softer over potholes and joints

Wheel sits closer to the fender

OEM-safe speedometer reading

Livable upgrade with minor trade-offs

Is 315/55 R16 OEM-safe?

Will 315/55 R16 rub?

Does the speedometer change?

Does lower sidewall affect comfort?

Detailed comparison

Verdict: excellent

Wider tire (+70 mm)

Lower profile (-10% aspect)

-1″ rim downsize

Speedometer impact

Ground clearance change

Drivers also compare

Frequently asked questions

Which tire is taller, 245/65 R17 or 315/55 R16?

What is the diameter difference between 245/65 R17 and 315/55 R16?

How much speedometer error does this change create?

Is 315/55 R16 a safe replacement for 245/65 R17?

What else should I check before changing tire size?