What does 19x8.5J ET35 5x112 CB66.6 mean?

19 is the rim diameter in inches, 8.5J is the rim width and flange profile, ET35 is the positive offset in millimetres, 5x112 is the bolt pattern (five bolts on a 112 mm circle) and CB66.6 is the center bore diameter in millimetres. All five values must match the vehicle before the wheel can be fitted safely.

Can I fit a wheel with a larger center bore?

Yes, if you use a hub-centric ring that reduces the bore to the vehicle hub diameter. A larger bore without a ring puts the load on the bolts instead of the hub and causes vibration. A smaller bore cannot be fitted at all without machining, which is not recommended.

How much offset difference is acceptable?

As a working rule, stay within about 5 mm of the original ET unless you have checked clearance. Moving 10 mm or more outward risks tyre-to-fender contact under compression and changes steering geometry; going inward risks brake caliper and suspension contact.

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Technical Guide

Wheel Fitment Guide: PCD, ET, CB & Size

Most wheel returns and mounting problems come from one number being wrong, not from a bad product. This guide shows how to read a wheel specification, how to measure the vehicle side, and which values are typical for the main European and Japanese brands.

Updated 2026-11-09·Applies to forged, cast and flow-formed wheels

Read the specification line first

Every wheel we quote carries a specification string in this order:

19 x 8.5J ET35 5x112 CB66.6 1020 kg

Value	Meaning	What goes wrong if it is wrong
19	Rim diameter in inches	Tyre will not seat; speedometer error.
8.5J	Rim width in inches plus flange profile (J = passenger car)	Tyre too narrow or stretched; bead seating issues.
ET35	Offset: distance from the mounting face to the rim centre line, in mm. Positive pushes the wheel inward.	Fender contact, brake caliper contact, changed steering feel.
5x112	Bolt pattern (PCD): number of bolts and the diameter of the bolt circle in mm.	Wheel physically will not bolt on.
CB66.6	Center bore: hub diameter the wheel is machined to accept.	Larger bore without a ring = vibration; smaller bore = cannot fit.
1020 kg	Load rating per wheel	Below the axle requirement for the vehicle = unsafe and non-compliant.

The four checks that matter

1. PCD (bolt pattern)

Count the bolts, then measure across the circle — not from bolt to bolt on a 5-bolt hub. For 5-bolt patterns measure from the centre of one bolt hole to the far edge of the hole two positions away.

Never fit a “close enough” pattern. A 5x114.3 wheel will bolt onto a 5x112 hub loosely and destroy the studs.

2. ET (offset)

The stamped number on the back of the wheel. Lower ET moves the wheel outward; higher ET moves it inward. Stay within roughly 5 mm of the original value unless you have measured clearance at full compression.

3. Center bore (CB)

A larger bore is usable with a hub-centric ring (66.6 → 72.6, 57.1 → 66.5, etc.). A smaller bore cannot be fitted without machining, which we do not recommend on a finished wheel.

4. Width and load rating

Match width to the tyre's recommended rim range, not just to the look. For SUVs, vans and EVs check the per-wheel load rating against the axle load — heavier vehicles need a higher rating than a passenger-car default.

Typical fitment values by brand

These are the values that cover the majority of recent models in each range. They are a starting point, not a guarantee — trim level, brakes and model year all change fitment, so confirm against the vehicle before production.

Brand / range	Typical PCD	Typical CB	Notes	Matching wheels
BMW 3/5/7 Series, X3/X5/X7 (F, G chassis)	5x112	66.6	M models can differ; check brake clearance on large calipers.	XCD-1208, XCD-1235
Mercedes-Benz C/E/S-Class, GLC/GLE/GLS	5x112	66.6	AMG brake packages need a larger inner barrel clearance.	XCD-1134
Audi A4/A6/Q5/Q7	5x112	66.5	Some models use 57.1 — measure, do not assume.	XCD-1301
Porsche 911 / Boxster / Cayenne / Macan	5x130	71.6	Center-lock cars are excluded; they use a single nut.	XCD-1502
Land Rover Range Rover / Discovery	5x120	72.6	Heavy vehicle — check load rating, not just PCD.	XCD-1601
Toyota / Lexus passenger and SUV	5x114.3	60.1	Pickups use 6-bolt patterns and are quoted separately.	XCD-1929
Multi-brand / custom program	Quoted per order	Quoted per order	Machined to your vehicle data, including staggered sets.	XCD-2830, Black Multi-Spoke

What we need from you to quote accurately

Vehicle: make, model, chassis code, model year and trim (brake package matters).
Target size: diameter and width, or just the look you want and we propose sizes.
Staggered or square: whether front and rear differ.
Load requirement: especially for SUVs, EVs, vans and vehicles used with trailers.
Market: so the design can be quoted with the right certification scope.

We verify PCD, ET, CB, width and load rating against the vehicle before production — this check is part of the order process, not an afterthought.

Five fitment mistakes we see most often

Assuming a brand has one PCD. Audi alone uses both 66.5 and 57.1 center bores depending on model and year.
Ignoring brake clearance. A larger-diameter wheel can still foul a big brake caliper on the inner barrel.
Fitting a larger bore without a ring. Vibration at speed is the usual result, and the hub carries no load.
Chasing a deep-dish look on a daily driver. Aggressive ET plus wide width usually means fender contact on compression.
Using a passenger-car load rating on an SUV. Load rating is a safety value, not a marketing number.

Send us your vehicle data

Give us the model, year and target size. We reply with a fitment-checked recommendation and a factory-direct quote within one business day.

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