Tyre manufacturing raw materials span reinforcing fillers (carbon black), process oils, natural and synthetic rubber, and vulcanisation chemicals, each specified separately by tyre component and matched against recognised standards such as ASTM D5899 and ISO/TC 31. Buyers should source carbon black by N-series grade and process oil by viscosity type rather than by generic category, and should check origin, classification and batch documentation before ordering.
Tyre manufacturing raw materials fall into a small number of functional groups — reinforcing fillers, process oils, elastomers, fabric and steel reinforcement, and vulcanisation chemicals — and a buyer's sourcing decision comes down to matching each group to a documented spec, not to a single "best" grade. According to the Japan Automobile Tyre Manufacturers Association (JATMA), "tyres are made up of over 100 different raw materials," and the compound a tread needs is not the compound a sidewall needs.
Why tyre compounding treats every component differently
According to the U.S. Tire Manufacturers Association (USTMA), compounding — the process of selecting and combining tyre materials — is intricate and highly specialized, with each component of the tyre (tread, sidewall, structural plies, stabilizing bead) requiring a specific compound tailored to its role. That is the starting fact for procurement: a single "tyre-grade" purchase order across all components is a category error. Reinforcing filler loading, oil type and elastomer blend all shift by component.
Once formulated, raw materials are processed together. USTMA describes a Banbury mixer combining the raw materials for each compound into a homogenized batch of black material with a gum-like consistency (USTMA, undated). Buyers who understand this step know why particle size and dispersibility of fillers, and pour/viscosity behaviour of oils, matter as much as the base chemistry — inconsistent inputs show up as mixing variance downstream.
The two rubber inputs and why their pricing does not move together
Compounds are built on two distinct rubber types. According to the U.S. Bureau of Labor Statistics (2020), the rubber-producing sector splits into natural rubber — an agricultural good primarily produced in East Asia — and synthetic rubber, a petrochemical-derived product. That structural difference is why the two inputs respond to different price drivers, and why a buyer tracking cost exposure needs separate visibility on each. The International Rubber Study Group (IRSG) publishes production, consumption, trade and price data for both natural and synthetic rubber monthly and quarterly — a standing reference point for anyone budgeting compound cost.
Reinforcing fillers: carbon black grade selection
Carbon black is the reinforcing filler that gives tread compound its abrasion resistance and the tyre its familiar black colour. According to WRAP (2006), passenger car, lorry and off-the-road tyres are made up of numerous different rubber compounds, many different types of carbon black, fillers like clay and silica, and chemicals and minerals added to allow or accelerate vulcanisation, alongside several types of reinforcing fabric and several kinds and sizes of steel. "Many different types" is the operative phrase — a compounder does not buy one carbon black grade for the whole tyre.
Matching N-series grade to component
N-series carbon black is graded by particle size and structure, which is why tread, sidewall and carcass compounds each draw on a different grade in the series. BHD Sourcing supplies N-series carbon black — N220, N234, N326, N330, N339, N375, N550, N660 and P-8201 — as named grades in the catalogue; matching a specific grade to a specific compound role is a formulation decision for the buyer's own compounding team, made against the tyre manufacturer's internal spec.
Carbon black's role in tyres is confirmed: the carbon-black family is used to make vehicle tyres, serving the tyre and rubber industry. That is the application a tread or sidewall compounder is sourcing against.
Process oils and anti-ozonants
Rubber process oils extend and plasticise the rubber compound, improving processability during mixing and extrusion. Rubber process oils are a confirmed input to vehicle tyre manufacture, serving the tyre and rubber industry. BHD Sourcing supplies Rubber Process Oil 125, 135, 145 and 155, along with base oil SN-500 — named grades a compounder can specify against their own viscosity and aromaticity requirements. Anti-ozonant chemistry, used to protect sidewall rubber from surface cracking, is a separate additive category from process oil and is sourced and specified independently.
Standards a procurement team checks before ordering
Tyre raw material specifications sit inside a wider standards framework, and a buyer's due diligence usually starts with the classification and certification bodies that define what a compliant material looks like.
| Standard / body | What it covers | Why a buyer checks it |
|---|---|---|
| ASTM D5899 | Classification for rubber compounding materials or ingredients normally used in formulating rubber compounds (ASTM International) | Confirms a material is classified for rubber-compound use, not for latex or solvent-based adhesive use |
| ISO/TC 31 | Standardization of classifications, size designations, dimensions, performance and electronic identification of tyres, rims and valves, including load/inflation/speed relationships (ISO, committee formed 1947) | The reference point tyre manufacturers use downstream; raw-material buyers align sourcing specs to the same classification language |
| IRSG monthly/quarterly reports | Production, consumption, trade and price data for natural and synthetic rubber | Gives a buyer an independent, published benchmark for rubber-input cost trends when negotiating supply |
What to check before you order
- Confirm which tyre component (tread, sidewall, ply, bead) the material is being specified for — grade requirements differ by component
- Request the carbon black grade designation (e.g. N-series number) rather than a generic "carbon black" order
- Confirm process oil viscosity and type (e.g. RPO 125/135/145/155 or SN-500 base oil) against your compound's processability requirement
- Ask whether the material is classified for rubber-compounding use under a recognised scheme such as ASTM D5899, not for an unrelated application
- Check origin and consistency of supply — mixing variance in the Banbury stage traces back to inconsistent filler or oil batches
- Cross-reference current rubber market pricing against an independent source such as IRSG reporting before locking a contract price
- Confirm lead time and shipment volume against your production schedule in writing, not verbally
- Request a certificate of analysis or batch documentation with each shipment
Working with BHD
BHD Group runs on two divisions under one accountable house: BHD Chemical and BHD Sourcing. For tyre and rubber compounders, that means N-series carbon black (N220 through N660, and P-8201) and rubber process oils (RPO 125, 135, 145, 155, plus SN-500 base oil) come from a single point of contact — origin integrity and one accountable house, rather than separate brokers for filler and oil. We name the grade we supply and let the buyer's own compounding spec decide fitness for purpose. Dependable by nature, delivered at scale.
Sources
- U.S. Tire Manufacturers Association (USTMA) — Tire Materials
- U.S. Tire Manufacturers Association (USTMA) — How a Tire Is Made
- Japan Automobile Tyre Manufacturers Association (JATMA) — Tyre Industry of Japan
- WRAP (Waste & Resources Action Programme), 2006 — The Composition of a Tyre: Typical Components
- International Rubber Study Group (IRSG) — Reports
- U.S. Bureau of Labor Statistics, 2020 — Why the prices of natural and synthetic rubber do not always bounce together
- ISO — ISO/TC 31 — Tyres, rims and valves
- ASTM International — ASTM D5899 — Classification for Rubber Compounding Materials
Frequently asked questions
What raw materials go into a tyre?
Tyres combine reinforcing fillers such as carbon black, process oils, natural and synthetic rubber, reinforcing fabric and steel, and chemicals that allow or accelerate vulcanisation. JATMA notes tyres are made up of over 100 different raw materials in total, and WRAP (2006) confirms the mix includes many different carbon black types, fillers like clay and silica, and several kinds of steel and fabric reinforcement.
Why does carbon black grade matter for tyre compounding?
Carbon black grade affects reinforcement and abrasion resistance, and different tyre components (tread, sidewall, ply) require different N-series grades. Buyers should request a specific grade designation such as N220 or N330 rather than ordering generic carbon black.
Are natural and synthetic rubber priced the same way?
No. According to the U.S. Bureau of Labor Statistics (2020), natural rubber is an agricultural good produced primarily in East Asia while synthetic rubber is petrochemical-derived, so the two inputs respond to different price drivers and should be tracked separately.
What standards should a buyer check before ordering tyre compounding materials?
ASTM D5899 classifies materials for rubber-compounding use, and ISO/TC 31 standardises tyre, rim and valve classifications that manufacturers align to. IRSG's monthly and quarterly reports give an independent benchmark for rubber-input pricing.
Why buyers work with BHD Group
Two divisions operate under a single accountable house. There is no handoff between a trading desk and a sourcing desk that leaves a buyer chasing an answer — one team owns the order from enquiry to delivery.
About