The Cost-Per-Hour Formula for Forklift Tyres
Most procurement teams evaluate forklift tyres on unit price. That is the most expensive way to buy them. This guide introduces the cost-per-hour formula — a better measure of tyre value — and shows how to use it when comparing grades, vendors, and replacement strategies.
The Problem With Buying on Unit Price
When a fleet manager or procurement team is asked to cut costs on forklift tyres, the first instinct is to find a cheaper tyre. Switch from ₹6,000 to ₹3,500 per tyre, multiply by fleet size, and present the saving to finance.
It looks good on paper. In practice, it almost always costs more.
The reason is simple: a tyre's unit price tells you nothing about how long it will last, how many times you will fit and re-fit it, or how much forklift downtime each replacement costs you. A tyre that costs half as much but lasts a third as long is not a saving — it is a cost increase with extra paperwork.
The correct metric for forklift tyre procurement is cost per operating hour — the total cost of owning and fitting a tyre, divided by the number of hours it ran before replacement. Everything else is incomplete.
The Formula
The cost-per-hour calculation has two parts:
| Component | What it includes |
|---|---|
| Total Tyre Cost (TTC) | Unit price + fitting labour cost + forklift downtime cost per replacement |
| Operational Hours (OH) | Hours the tyre ran before it reached the replacement threshold (60-J line or visible damage) |
Cost Per Hour = Total Tyre Cost ÷ Operational Hours
Compare this number across grades and you will know — with certainty — which tyre is actually cheaper.
Step 1: Calculate Your Operational Hours
Before you can apply the formula, you need to know how many hours a tyre runs before replacement in your operation. This depends on your shift pattern, operating days, floor conditions, and application intensity.
Start with your annual hours. The figures below are approximate industry reference points — adjust for your actual shift schedule and calendar:
| Operation type | Daily hours | Working days/year | Annual hours |
|---|---|---|---|
| Single shift | 8 | 250 | ~2,000 hrs |
| Double shift | 16 | 300 | ~4,800 hrs |
| 24×7 (with maintenance) | 20 | 330 | ~6,600 hrs |
Then estimate tyre life in months. If you replace a tyre every 10 months on a double-shift operation, that tyre ran for approximately 4,000 hours (10 months × 400 hours/month).
If you do not know your tyre life: check the replacement history in your maintenance log. If records are not kept, start keeping them now — tyre life data is the single most important input to this formula. Without it, you are estimating.
Step 2: Calculate Your Total Tyre Cost
Unit price is only part of the number. The full cost of a tyre change includes:
Fitting Labour
Pressing a solid resilient tyre onto a split rim requires a tyre press and a trained technician. A standard fitment takes 30–60 minutes per tyre depending on size. At your workshop labour rate, this is a real cost — and it is paid every time the tyre is changed, regardless of the tyre's price.
A cheaper tyre changed three times carries three fitting costs. A premium tyre changed once carries one.
Forklift Downtime
While the tyre is being changed, the forklift is out of service. A typical tyre change (both drive axle tyres, which must always be replaced as a pair) takes 1.5–2.5 hours including removal, pressing, and reinstallation.
In a high-utilisation warehouse, a 2-hour downtime per forklift per change is a real productivity loss. Multiply that by the number of changes per year, per machine, and the number gets significant.
The Pairing Rule
Solid tyres must always be replaced in axle pairs — both drive tyres together, both steer tyres together. This means one tyre failing early forces the replacement of its partner, even if that tyre still has life left. A tyre that fails prematurely does not just cost its own unit price — it costs two tyres plus two fittings plus the downtime.
Lower-grade compounds fail more unevenly and unpredictably, making early-failure events more common. Premium compound grades wear more evenly across both tyres, making paired replacement at natural end-of-life the norm.
Management Overhead
Each replacement cycle involves a purchase order, vendor follow-up, goods receipt, and quality check. In larger fleets, procurement staff time is a measurable cost. Fewer replacement cycles = fewer POs = lower overhead.
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The following is an illustrative example only — the numbers are not Adamas list prices or guaranteed service life figures. They use relative multipliers to show how grade economics typically compare in a high-utilisation warehouse operation. Your actual costs will differ based on tyre size, application, floor condition, and supplier pricing. The directional relationship between grades, however, holds consistently across most industrial operations.
| Grade | Relative unit price | Typical service life | Replacements in 24 months | Total unit cost (24 months) | Est. cost per hour |
|---|---|---|---|---|---|
| Economy | 1.0× | 6–8 months | 3–4 sets | 3.5× unit price | Highest |
| Standard | 1.3× | 10–12 months | 2 sets | 2.6× unit price | Moderate |
| Heavy Duty | 1.6× | 14–18 months | 1–2 sets | 2.4× unit price | Low |
| Premium | 2.0× | 20–26 months | 1 set | 2.0× unit price | Lowest |
In this example, Economy grade is replaced 3–4 times over 24 months. Premium grade — suited to high-utilisation and 3-shift operations — is replaced once. Even before accounting for fitting labour and downtime costs, the Economy grade has a higher total cost over the same period — despite a lower unit price.
Once you add fitting labour (paid on every replacement) and downtime (2 hours per replacement event), the gap widens further.
Note: These are illustrative ranges based on typical high-utilisation warehouse use on smooth concrete. Actual tyre life depends heavily on floor condition, application intensity, load weight, and operating speed. A heavily contaminated floor or rough concrete can cut tyre life by 30–50% across all grades — read our floor conditions guide before drawing conclusions from this table.
When Economy Grade Is the Right Choice
The cost-per-hour formula does not always favour premium grades. There are genuine situations where Economy or Standard is the correct procurement decision:
- Light-duty, low-utilisation operations — a forklift running 4–6 hours a day, 5 days a week, on a clean epoxy floor in a light warehouse will not wear out even an Economy tyre quickly. The cost difference between Economy and Premium may not be recovered over the tyre's natural life.
- Severe environments that destroy all grades equally — in operations with extreme chemical contamination, very high temperatures, or highly abrasive debris, even Premium compound can fail before its normal service life. Confirm the compound chemistry is appropriate for the environment before specifying grade.
- Forklift nearing retirement — if the machine is being retired within 12 months, buying a long-life premium tyre is not a good investment. Economy or Standard is appropriate.
- Budget-constrained situations where operations allow for more frequent changes — if maintenance is done in-house and downtime is negligible, the labour cost component is low and Economy may genuinely be acceptable.
How to Present This to Finance
The cost-per-hour argument is powerful with finance teams because it converts a capital expenditure comparison (unit price) into an operating cost comparison (cost per hour) that shows up in P&L.
A simple way to frame it:
- Pull your tyre replacement records for the last 12–24 months — number of replacements, dates, forklift ID
- Add up the total spend: tyre cost + any fitting invoices
- Estimate total downtime hours for those replacements (number of events × average downtime per event)
- Divide total spend by total operational hours of those tyres
- Then repeat the exercise with the projected figures for a higher grade and longer service life
Present both numbers side by side. In most double-shift or 24×7 operations, the premium grade wins clearly and the business case is straightforward.
Using This Formula When Evaluating Suppliers
The same formula applies when comparing tyres from different suppliers — not just different grades.
A supplier offering a lower unit price for what appears to be the same grade is only cheaper if the tyre delivers the same service life. If it does not — because of inferior compound quality, inconsistent curing, or weaker base bonding — the lower unit price becomes a higher cost per hour.
The questions to ask any tyre supplier: What is the compound shore hardness? What is the base-to-buffer bond specification? What warranty is offered, and under what conditions? Answers to these questions determine whether the unit price comparison is valid.