OEM wheel and tire fitment specs for the 2008 Audi TT, including bolt pattern (PCD), center bore diameter, thread size, rim diameter, rim width, wheel offset, and backspacing.
Recorded OEM specifications for the 2008 Audi TT, donor years with overlapping ranges, and a calculator to compare a selected wheel. Range overlap is not a guaranteed fit.
Multiple OEM configurations exist for this vehicle. Fitment can vary by trim, brakes, and factory wheel package – confirm your exact setup before buying.
Thread-only product links are shopping examples, not verified fits. Seat style is not confirmed here. As an Amazon Associate we earn from qualifying purchases.
Donor vehicles with overlapping OEM specs
These are vehicle-year records whose recorded OEM ranges overlap this 2008 Audi TT. Overlap is not a guarantee that a specific wheel will install. Selected-wheel comparison is in the calculator below.
Evaluated 135 donor years. Listed 24 eligible overlaps (not all evaluated years are compatible). Showing all listed.
Wheel geometryOEM width/offset ranges overlap (not a specific wheel)
Recorded OEM bolt pattern, center bore, and width/offset ranges overlap. This is not a guarantee that every wheel from the donor year fits this vehicle.
Wheel geometryOEM width/offset ranges overlap (not a specific wheel)
Approximate position vs the mid OEM package: outer change -5.85 mm, inner change -6.85 mm. This uses aggregated width/offset ranges, not a specific wheel.
Audi TT Years With Compatible Wheels
Only years with evidence-based interchange relationships are listed. Adjacent years are not assumed compatible.
Compare a donor vehicle or custom wheel against this 2008 Audi TT. Use Compare in calculator on a donor row above to fill the donor side of this same calculator.
Compare
Compare wheel compatibility between two vehicles
Wheels from (donor vehicle)
Selected Car:
Custom wheel size (optional)
Tip: change values here to simulate custom wheels and immediately see the impact in the comparison below.
Custom tire size (optional)
Installed on (your vehicle)
Selected Car:
2008 Audi TT
Compare Rims
Specification
Wheels from
Installed on
Result (Click it)
Bolt Pattern
The total number of bolt holes and the diameter of the circle they form.
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5x112
Center Bore
The hole in the center of the wheel that fits over the vehicle’s hub.
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57.1 mm
Thread Size
The size and spacing of the threads on the bolts or nuts that hold the wheel in place.
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M14 x 1.5
Rim Diameter
The wheel diameter in inches that determines which tire sizes will fit.
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16"
Rim Width
The distance between the inner edges of the wheel is measured in inches.
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7.0"
Wheel Offset
How far the wheel sits inward or outward relative to the hub mounting surface.
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47 mm
Backspacing
Shows how much space the wheel takes up toward the inside of the vehicle.
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-
Wheel Fasteners
The type of hardware used to secure the wheel to the vehicle.
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-
Compare Tires
Specification
Wheels from
Installed on
Result (Click it)
Section Width
The width of the tire from sidewall to sidewall, measured in millimeters.
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-
Aspect Ratio
The height of the tire’s sidewall expressed as a percentage of its width.
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Diameter
The wheel diameter for which the tire is designed to fit.
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-
Tire Pressure
The recommended air pressure for safe and efficient driving.
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Overall Diameter
The total height of the tire and wheel combined affects clearance and speedometer accuracy.
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-
Wheel Fitment Parts for the 2008 Audi TT
Example products matched to recorded thread, hub, or spacer dimensions. They are not verified fits. Confirm seat style, thickness, and clearance before ordering.
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2008 Audi TT wheel fitment and interchange guide
tl;dr
Use the OEM baseline to model safe changes. Keep 5x112, 57.1 mm hub bore, and M14x1.5 bolts. Match hub-centric fit or use proper rings. Stay close to stock tire diameter. Verify brake and suspension clearance using the on-page calculator.
OEM baseline specs
Values shown are what we have for the 2008 Audi TT. Trims and brake packages can change some limits. If a value is unknown for your specific car, confirm with the calculator, your owner manual, and an Audi parts source before buying.
Bolt pattern
5x112
Center bore
57.1 mm
Thread size
M14 x 1.5
Rim size
16 x 7.5 in
Offset
ET45
Backspacing
5.52 in
OEM tire size
225/55R16
Recommendation
I approach 2008 Audi TT wheel swaps in stages. Start with fitment fundamentals, then model changes, then test fit.
Keep the bolt pattern 5x112. Do not use wobble hardware to force a fit.
Use a 57.1 mm hub-centric fit. If an aftermarket wheel has a larger bore, fit quality hub-centric rings with 57.1 mm inner diameter.
Retain M14x1.5 wheel bolts. Confirm seat type matches the wheel. Audi OEM wheels often use ball seats, while many aftermarket use conical seats. Check the wheel maker’s spec.
Use the calculator on this page. Set “Installed on” to your 2008 TT with the OEM baseline above. Compare a donor wheel or enter a custom wheel and tire. The tire diameter adjusts when you change rim diameter.
Target a tire diameter close to stock. Many shops aim for under about a 3 percent difference. The calculator will show the delta.
For offset changes, keep inner clearance and poke reasonable. ET45 on 7.5 in is your reference. Larger positive ET moves the wheel inward. Smaller ET pushes it outward. Use the calculator to visualize inner clearance to strut and outer fender poke.
Brake package matters. Some TT trims have larger front brakes that may not clear smaller diameter wheels. Physically check caliper to barrel clearance during test fit.
If using spacers, only as needed for clearance, and with longer, correct-seat M14x1.5 bolts. Verify at least 6.5 to 7 full turns of engagement. Measure, do not guess.
Impact
Changes in wheel and tire specs affect how the TT drives and wears components. Model before you buy.
Offset change affects scrub radius and steering feel. Too much outward poke can tramline. Too much inward can foul suspension.
Width change alters inner clearance and fender risk. The calculator shows inner clearance delta and outer poke.
Tire diameter change shifts speedometer and gearing. Larger diameter softens launch and reads slower. Smaller does the opposite.
Unsprung weight affects ride and braking. Heavier setups ride harsher and increase stopping distance.
Center bore or seat mismatch causes vibration. Hub-centric and correct-seat bolts maintain concentricity.
Risks and gotchas
Brake clearance is the usual limiter. Check caliper to barrel and spoke clearance with a feeler gap. Do a slow rotation test during mock-up.
Seat type mismatch. Ball-seat bolts in conical-seat wheels, or vice versa, damage seats and can loosen.
Bolt length and spacer math. Too short reduces clamp load. Too long can bottom in the hub. Measure shank length against the hub depth.
Center bore issues. A larger aftermarket bore needs quality rings. A smaller bore will not seat. Do not force it.
Tire bulge. Same wheel width can still rub if the tire runs wider than nominal. Compare section width in the calculator and manufacturer specs.
TPMS compatibility varies by market and trim year. Some systems are indirect. Others use in-wheel sensors. Confirm before breaking down tires.
Alignment after changes. Wider tread or offset variance can accelerate wear without a quick alignment check.
Next actions
Checklist
Load the OEM setup in the calculator. Enter your candidate wheel and tire. Check inner clearance, poke, and diameter change.
Confirm brake package and minimum wheel diameter in your owner manual or by measuring caliper to barrel clearance.
Verify wheel seat type and center bore with the seller. Plan hub-centric rings if the wheel bore exceeds 57.1 mm.
If spacers are needed, calculate required thickness in the calculator. Source matching extended M14x1.5 bolts with the correct seat.
Test fit a front corner first. Hand rotate lock to lock. Load the suspension if possible and recheck gaps.
Torque to the Audi spec from your manual. Re-torque after 50 to 100 miles.
If any specification is unclear or varies by trim, use the calculator on this page together with your VIN, the owner manual, and an Audi parts catalog to confirm before purchase. This keeps your 2008 Audi TT safe, vibration free, and aligned with OEM limits.
Methodology and sources
Wheel interchange depends on more than bolt pattern. Where data is available, this site compares recorded OEM values:
Bolt pattern / PCD
Center bore direction (donor wheel bore must not be smaller than the hub)
Wheel diameter, width, and offset against known OEM ranges
A normal wheel spacer does not change bolt pattern. Hub rings cannot enlarge a wheel bore that is smaller than the hub. Brake clearance and tire package fitment still require vehicle-specific checks when not confirmed in the dataset.
