Wheels explained

What are alloy wheels?

Alloy wheels are car wheels made from aluminium mixed with small amounts of other metals, which makes them lighter than steel and easier to shape into attractive designs. Most modern cars wear them, either as standard or as an upgrade.

What alloy wheels are made of

An alloy is a blend of metals. In a wheel the main ingredient is aluminium, combined with other elements such as silicon or magnesium to add strength and help the metal flow into a mould. Pure aluminium would be too soft for a wheel. The mix gives a rim that is light, stiff enough for the road and good at carrying heat away from the brakes.
What alloy wheels are made of
Heavy kerb rash along the rim and spokes of a silver alloy wheel

Cast and forged wheels

There are two main ways to make an alloy wheel, and they give different results. Both types are finished and coated before they reach the car, and both can be refurbished when the surface is damaged.

Common alloy wheel finishes

  • Painted. The wheel is primed, coloured and covered with a clear lacquer. Silver and grey are the familiar shades.
  • Diamond cut. A lathe machines a bright, reflective face into the wheel, and a clear coat protects it. Our guide on what diamond cut alloy wheels are covers it in full.
  • Powder coated. Dry powder is applied to the bare wheel and baked on, giving a tough surface in gloss, satin, matte or metallic.
Buckled rim on a silver BMW alloy wheel

How alloy wheels get damaged

Surface marks are cosmetic. A bend, a crack or air loss is a safety matter and the wheel should be checked before you use it again.
  • Kerb strikes that scrape the rim and leave kerb rash.
  • Potholes and speed bumps, which can bend or crack the wheel.
  • Stone chips and worn lacquer that let corrosion start.
  • Brake dust and road salt that attack the surface over time.
How alloy wheels get damaged
How alloy wheels are repaired

How alloy wheels are repaired

The right repair depends on the damage. Scuffs and chips can often be filled, sanded and refinished. A bent rim can usually be straightened, and some cracks can be welded and checked, while a wheel that is too badly damaged may need replacing. At our Crown Road workshop, wheels are stripped to bare metal, repaired and refinished, with straightening, welding and CNC diamond cut done in-house. Standard refurbishment takes 36 to 48 hours, and diamond cut takes 2 working days. Free loan wheels are available subject to stock, so call to check for your make. Our mobile team can handle minor scuffs, kerb damage and paint chips on the same day, in about 2 to 4 hours. If you are outside the areas we list, send your postcode and we'll confirm. See alloy wheel refurbishment for the full service.

Frequently asked questions

What are alloy wheels made of?
Aluminium mixed with small amounts of other metals, such as silicon or magnesium. The blend is stronger than pure aluminium and still light.
What is the difference between cast and forged alloy wheels?
Cast wheels are made by pouring molten alloy into a mould. Forged wheels are pressed from a solid block under great pressure, which makes them denser and stronger.
Are alloy wheels better than steel?
Alloys are lighter and look better, so most buyers prefer them. Steel wheels are tougher on a hard knock and suit vans and winter sets.
Do alloy wheels rust?
Aluminium does not rust, but it corrodes when the paint or lacquer is damaged. White spots, bubbling or flaking are the usual signs.
Can damaged alloy wheels be repaired?
Often yes. Scuffs, kerb rash and corrosion can be refinished, and many bent wheels can be straightened. Send us a photo and we will say what the repair involves.
Get a quote

Get a quote

Send a photo of your wheels and we will quote within 24 hours. Call or send a photo first so we can book a time. Or call us on 0207 060 3666 Unit 1, 38 Crown Road, Enfield, EN1 1TH · Mon-Fri 8am-6pm · Sat 8am-1pm

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Address
Unit 1, 38 Crown Road
Enfield
EN1 1TH

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