Sailun has moved from a value alternative to a serious option in North American and global fleets, and its latest commercial truck catalog reflects that. The tire range is organized by position (steer, drive, trailer, wide-base and mixed service), the new TOP Line series targets fuel efficiency, and the back of the book carries a full set of load limits at various cold inflation pressures. This guide explains how to use that chart and how to choose pressure by load range. If you want the cross-brand picture, start with our truck tire pressure chart by axle load.
One caution from Sailun’s own catalog: the distributor, TBC Corporation, states that the information in the load tables should be considered approximate and that the manufacturer cannot be held responsible for discrepancies. Treat the tables as a planning tool and confirm against the sidewall and Sailun’s technical team before changing a fleet standard.
How the Sailun inflation chart is organized
The load limit table lists, for each size, the load in kilograms and pounds at a series of cold inflation pressures from 380 kPa (55 psi) to 900 kPa (130 psi). Each size has a dual row and a single row, and load range markers (D, E, F, G, H, J, L) appear against the pressure at which a given range reaches its rated load. The chart is based on standard tire and rim practice, and the tires are rated for normal highway service on 15-degree drop-center rims, except 20-inch and 24-inch sizes, which use flat-bead rims.
Reading it is simple once you know the three levers: size, fitment (dual or single) and pressure. The load rating of a tire is not fixed; it rises with pressure up to the load range maximum. A tire running 80 psi cannot be rated for the same load as one running 120 psi.
Load limits at 80 psi, size by size
The table below uses the 80 psi column, which is a common service pressure for regional and mixed-service tires. Values are per tire, in kilograms and pounds.
| Size | Dual (kg / lb) | Single (kg / lb) |
|---|---|---|
| 215/75R17.5 | 1,600 / 3,525 | 1,700 / 3,750 |
| 235/75R17.5 | 2,000 / 4,410 | 2,120 / 4,675 |
| 255/70R22.5 | 1,800 / 3,970 | 1,900 / 4,190 |
| 295/75R22.5 | 2,060 / 4,540 | 2,240 / 4,940 |
| 295/80R22.5 | 2,300 / 5,070 | 2,500 / 5,510 |
| 305/70R22.5 | 2,360 / 5,205 | 2,575 / 5,675 |
| 315/80R22.5 | 2,575 / 5,675 | 2,800 / 6,175 |
Two patterns appear. The single rating is about 8 to 10 percent higher than the dual rating for the same size, which is the usual derating for twin assemblies. And the jump from 295/75R22.5 to 315/80R22.5 is about 25 percent in dual capacity at the same pressure, so a size change is a real capacity change, not just a cosmetic one.
Wide-base and super single tires
Sailun’s TOP Line includes super singles for drive and trailer positions, such as the S705 EFT drive and the S696 EFT trailer. The chart lists them as single tires only. At 80 psi the published limits are:
| Size | Load at 80 psi (kg) | Load at 80 psi (lb) |
|---|---|---|
| 385/65R22.5 | 3,150 | 6,940 |
| 425/65R22.5 | 3,750 | 8,270 |
| 445/50R22.5 | 3,320 | 7,310 |
| 445/65R22.5 | 4,125 | 9,090 |
These match the figures other manufacturers print for the same sizes because they share a common standard, which is useful when you run mixed brands. If you are planning a conversion from duals, our later guide in this series on super single pressure covers the details, and our 11R22.5 pressure guide covers the dual case.
Choosing pressure by load range
Load range letters in the Sailun catalog track the traditional ply ratings: E for 10 ply, F for 12 ply, G for 14 ply, H for 16 ply, J for 18 ply and L for 20 ply. The lighter regional sizes are offered mainly in higher ranges. According to the size chart: 215/75R17.5 and 235/75R17.5 are H, 245/70R17.5 is J, 225/70R19.5 is G, 245/70R19.5 and 265/70R19.5 are H, 9.00R20 is H and 10.00R20 is J. The 445/50R22.5 wide-base is L. Practical consequences:
- A higher range allows a higher maximum pressure, and therefore a higher maximum load, in the same physical tire.
- Do not mix load ranges on the same axle unless the manufacturer says they are compatible.
- Choose the lowest range that carries your heaviest realistic axle load with a margin. Over-specifying range adds weight and stiffness for no benefit.
Cross-checking against another brand’s table
A good habit is to compare a manufacturer’s chart with a second source. Take the 295/80R22.5 single. Sailun lists 2,500 kg per tire at 80 psi. Goodyear’s European data book lists 5,010 kg per axle (two tires, so 2,505 kg each) at 5.50 bar, which is about 80 psi. The difference is five kilograms. For the 385/65R22.5 the gap is larger: Sailun lists 3,150 kg at 80 psi against Goodyear’s 3,035 kg per tire at 5.50 bar, about 4 percent apart, because the two tables follow different standards. When two charts disagree, use the lower figure for fleet policy. See our Continental load and inflation table article for another example of how regional standards differ.
TOP Line and SmartWay: why pressure matters more for fuel-efficient tires
Sailun’s EFT program includes SmartWay Verified low rolling resistance tires: the S605 EFT, S606 EFT, S665 EFT, S624 EFT, S696 EFT, S768 EFT, SDL70 EFT and S705 EFT. The EPA states that verified low rolling resistance tires can cut fuel use and emissions of long-haul tractor-trailers by 3 percent or more. That saving depends on correct inflation. A tire that runs soft loses its advantage because its rolling resistance rises with deflection. Read our guide to low rolling resistance truck tires and the total cost of ownership analysis to see how a few percentage points of fuel become a large annual number.
A pressure policy for a Sailun fleet
- Set a cold pressure per axle based on the heaviest load, using the dual or single row.
- Choose the tire’s load range to match that pressure, not the other way round.
- Check weekly with a calibrated gauge, cold.
- Keep duals within 5 psi of each other.
- Re-weigh when the commodity or trailer changes.
- Record pressure by wheel position and review trends monthly.
Worked example: a regional tractor with 295/75R22.5 drive tires
Suppose a regional tractor has a drive axle weighing 17,000 lb at gross weight, carried by four dual tires. That is 4,250 lb per tire. The Sailun 80 psi column gives 4,540 lb per tire in dual fitment for the 295/75R22.5. The margin is 290 lb, or about 7 percent, so 80 psi is acceptable on paper. But a load shift, a pothole or an uneven dual pair can easily eat 7 percent, so most fleets would step up one pressure column to 85 psi and keep that value as the standard for the axle. The cost of the extra 5 psi is negligible. The cost of a heat-damaged casing is not.
Now take the steer axle. If it carries 12,000 lb on two single tires, that is 6,000 lb per tire. A 315/80R22.5 at 80 psi is rated 6,175 lb single, so the margin is only 175 lb or about 3 percent. That is too thin. Either raise the pressure within the tire’s load range or move to a higher-capacity size. The point of a load table is to make those decisions explicit instead of relying on rule-of-thumb pressures.
Mistakes to avoid with a manufacturer chart
- Using a dual-fitment limit for a wide-base tire, or the single limit for a dual axle.
- Confusing kPa and psi columns. 80 psi is 550 kPa, not 800 kPa.
- Reading across to a higher pressure than the rim or wheel allows. Always check the wheel rating as well.
- Ignoring approximate-data disclaimers. If the catalog says the figures are approximate, confirm against the sidewall and the manufacturer before locking in a policy.
- Treating the chart as a one-time exercise. Axle loads, trailers and cargo change, so review the policy at least twice a year.
A short audit, with ten trucks sampled each quarter, will tell you whether your policy matches your loads. If more than one in five tires is outside five psi of target, the policy is not being followed in the yard, and no chart will fix that.
FAQ
Is the Sailun table in kPa or psi?
Both. The chart lists kPa and psi at the top of each column and gives load in kilograms and pounds.
Can I use the dual row for a wide-base tire?
No. Wide-base tires are single fitment, so use the single row only.
What does the (E), (F), (G) or (H) after a load mean?
It marks the load range reached at that pressure, for example the pressure at which a tire reaches its rated load as a G or an H.
Key takeaways
Sailun’s inflation chart is a standard load-versus-pressure table. Use the right row, match the load range to your axle weights, treat the figures as approximate, and cross-check against another source when in doubt. Then maintain pressure weekly. For the rest of the cluster, see our pressure management hub.
