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Steel Spoke Specification Example for Emergency Vehicles: Reinforced Build

Source:Automotive Tail Light / Time:2026-09-18

Steel Spoke Specification Example for Emergency Vehicles: Reinforced Build

This is a worked specification for steel spoke in a reinforced build programme. It is the document we would send a buyer who asks what exactly they are getting: the material, the dimensions that are actually controlled, the finish, and the checks that happen before anything is packed.

The reinforced build version exists because the duty cycle on emergency vehicles is not the same as on a showroom vehicle. Where the two are specified identically, something fails later — usually a fitment that looked right on paper and failed on the bench.

Steel Spoke

Example specification

ItemSteel Spoke
ApplicationEmergency Vehicles
VersionReinforced Build
Base materialCarbon Fibre Composite
Controlled dimensions5 key dimensions, recorded per lot
Tolerance band±0.2 mm
Finishpainted
MOQ3,000 pieces per specification
Sampling14 working days, 3 days per revision
ComplianceTUV

How the example is built up

  1. Start from the duty cycle, not from the catalogue photograph.
  2. Fix the base material in writing — Carbon Fibre Composite, in this example.
  3. List the dimensions that are actually controlled and the tolerance on each.
  4. Name the finish and what it has to survive.
  5. State the inspection level and who pays when a lot fails.

Steel Spoke example

Processes involved

  • electroplating
  • laser cutting
  • shot blasting
  • assembly line testing
  • gravity casting
  • cold forging

Where this example applies

Programmes that run reinforced build most often specify this build for emergency vehicles. Related applications include fleet maintenance, assembly programmes, long-haul trucks, utility trailers, trailer axles.

Checks before packing

  • Dimensional report against the approved drawing.
  • AQL 2.5 sampling on the finished lot.
  • Finish inspection under agreed lighting.
  • Carton drop test on the first lot of a new packing specification.

Questions buyers ask

What testing is included?

Standard lots ship with dimensional and hardness reports. TUV documentation is issued with the shipment when your market requires it.

Do you handle mixed containers?

Yes. Most programmes consolidate several part numbers into one container to keep freight sensible at 3000 pieces per line.

What happens if a lot fails inspection?

The lot is re-inspected against the golden sample, and replacement pieces ship on the next available booking at our cost.

What is the minimum order quantity?

The standard MOQ is 3000 pieces per specification. Mixed sizes inside one shipment are accepted once the total reaches that figure.

Tell us the model, the fitment and the quantity and we will hold a production slot for you.

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