The two most common trailer bearing kits in Australia are Holden (LM67048 inner cone, 31.75 mm bore, with LM11949 outer, 19.05 mm) and Ford, also called slimline (L68149 inner, 34.99 mm, with LM12749 outer, 21.99 mm). The stub axle decides which you need, not the studs. We sell both, as the 2x Holden kit and the 2x Ford kit.
If you can read the number on your old inner cone, find it in the chart below and you're done.
Trailer bearing size chart
| Set (common name) | Inner cone / cup | Inner bore | Outer cone / cup | Outer bore | Our kit |
|---|---|---|---|---|---|
| Holden (LM) | LM67048 / LM67010 | 31.75 mm (1 1/4") | LM11949 / LM11910 | 19.05 mm (3/4") | 2x Holden kit |
| Ford, slimline (SL) | L68149 / L68110 | 34.99 mm (1.3775") | LM12749 / LM12710 | 21.99 mm (0.8656") | 2x Ford kit |
| Parallel (Ford inner used twice) | L68149 / L68110 | 34.99 mm | L68149 / L68110 | 34.99 mm | 2x parallel kit |
| 1.5 tonne | LM29749 / LM29710 | 38.10 mm (1 1/2") | LM67048 / LM67010 | 31.75 mm | 2x 1.5 tonne kit |
| 2 and 2.5 tonne | HR30210 (30210 size) | 50.00 mm | 15123 / 15245 | 31.75 mm | 2x 2 or 2.5 tonne kit |
| 3 tonne | HR30210 (30210 size) | 50.00 mm | LM29749 / LM29710 | 38.10 mm | 2x 3 tonne kit |
Source: bearing makers' published part data (bore) and an axle maker's bearings catalogue (set make-up, and 50.00 mm for HR30210), see Sources; our product listings. Read 27 and 28 September 2026. More combinations, and the cup sizes, are further down.
Holden trailer bearing sizes
- Inner bearing: cone LM67048, cup LM67010. Bore 31.75 mm (1 1/4"), cup outside diameter 59.13 mm.
- Outer bearing: cone LM11949, cup LM11910. Bore 19.05 mm (3/4"), cup outside diameter 45.24 mm.
- Written as: LM67048/10 and LM11949/10.
- Typical axle: AL-KO fits LM bearings to its 39 mm round and 40 mm square stub axles, and LM marine bearings to its 45 mm square stubs.
Ford trailer bearing sizes
- Inner bearing: cone L68149, cup L68110. Bore 34.99 mm (1.3775"), cup outside diameter 59.13 mm.
- Outer bearing: cone LM12749, cup LM12710. Bore 21.99 mm (0.8656"), cup outside diameter 45.24 mm.
- Written as: L68149/10 and LM12749/10.
- Typical axle: AL-KO fits SL (slimline) bearings to its 45 mm round stub axles.
The axle decides the kit, not the stud size
Look at the cup sizes: a Holden cup and a Ford cup have the same outside diameter, inner and outer. Both sets fit the same hub bores, 59.10 mm inner and 45.20 mm outer, and take the same DC1 grease cap. So a Holden hub and a Ford hub can look identical, whatever studs they carry.
What differs is the cone bore, which has to match the stub axle. AL-KO sells each stub axle with its bearing type (LM, SL, parallel, 1.5T, 2T, 3.0T). That's why the bearings follow the axle, and why a Ford-pattern hub can hold Holden bearings. The step-by-step check is in Holden or Ford trailer bearings? How to tell.
How to tell which bearings your trailer has
- Read the number on the inner cone. Wipe the grease off the cone face. LM67048 is Holden, L68149 is Ford.
- Read the outer cone and both cups. A matching outer (LM11949 or LM12749) confirms the set. Anything else, find it in the combinations table below.
- No number? Measure the stub axle. Put vernier callipers across the inner bearing seat: about 31.75 mm is Holden, about 35 mm is Ford.
- Count the wheels. A 2x kit does two wheels. A single kit does one hub.
Get a trailer workshop or mechanic to look at it if a hub ran hot, the bearing grinds or has play, the cup is pitted, or the axle seat is scored or blue. Most of our kit listings say all parts should be fitted by a licensed professional to vehicle specifications.
Other trailer bearing combinations
Holden and Ford are the most common kits, but they aren't the only ones. These are the other pairs we come across, with sizes checked against the bearing makers' published data.
| Inner bearing | Outer bearing | Inner bore | Outer bore | Our kit |
|---|---|---|---|---|
| LM67048/10 | LM12749/10 | 31.75 mm | 21.99 mm | 2x composite Ford/Holden kit |
| 25590/20 | 25590/20 | 45.62 mm | 45.62 mm | 2x 25590 parallel kit |
| 25580/20 | 15123/245 | 44.45 mm | 31.75 mm | 2x Dexter AU kit, Dexter US kit, 2x ModCon kit |
| 25580/20 | LM67048/10 | 44.45 mm | 31.75 mm | 2x Kimberley disc brake kit |
| L68149/11 | L44649/10 | 34.99 mm | 26.99 mm | 2x American import kit |
| LM48548/10 | L44649/10 | 34.93 mm | 26.99 mm | 2x Trojan 2 tonne kit |
| L68149/11 | LM67048/10 | 34.99 mm | 31.75 mm | Not listed as a kit |
| 30308 | 15123/245 | 40.00 mm | 31.75 mm | Not listed as a kit |
| 30210/10 | LM12749/10 | 50.00 mm | 21.99 mm | Not listed as a kit |
| L44643 (L44610 cup) | L44643 (L44610 cup) | 25.40 mm | 25.40 mm | Not listed as a kit |
| L44649/10 | L44649/10 | 26.99 mm | 26.99 mm | Not listed as a kit |
Source: bearing makers' published part data (bore), see Sources; our product listings for each kit. Read 28 September 2026.
A common trap is the L68149/11. The cone is the same L68149 as a Ford kit, but it sits in an L68111 cup, 59.97 mm across instead of 59.13 mm. A standard Ford kit won't fit that hub, no matter how hard you try. And 25580 is not 25590: both use the 25520 cup, but the cone bores differ by about 1.2 mm.
Trailer bearing part numbers decoded
A tapered roller bearing is two parts: the cone (the inner ring with the rollers) and the cup (the outer race pressed into the hub). Each has its own number. The shorthand "/10" means the cup that shares the cone's number stem: LM67048/10 is cone LM67048 with cup LM67010. Likewise 15123/245 is cone 15123 with cup 15245, and 25580/20 is cone 25580 with cup 25520.
| Part | What it is | Bore or outside diameter | Where you'll find it |
|---|---|---|---|
| LM67048 | Cone | 31.75 mm bore (1 1/4") | Holden inner; 1.5 t outer |
| LM67010 | Cup | 59.13 mm OD | Holden inner |
| LM11949 | Cone | 19.05 mm bore (3/4") | Holden outer |
| LM11910 | Cup | 45.24 mm OD | Holden outer |
| L68149 | Cone | 34.99 mm bore (1.3775") | Ford inner; parallel |
| L68110 | Cup | 59.13 mm OD | Ford inner; parallel |
| L68111 | Cup | 59.97 mm OD | American import inner |
| LM12749 | Cone | 21.99 mm bore (0.8656") | Ford outer; composite outer |
| LM12710 | Cup | 45.24 mm OD | Ford outer |
| LM29749 | Cone | 38.10 mm bore (1 1/2") | 1.5 t inner; 3 t outer |
| LM29710 | Cup | 65.09 mm OD | 1.5 t inner; 3 t outer |
| 15123 | Cone | 31.75 mm bore (1 1/4") | 2 and 2.5 t, Dexter, ModCon outer |
| 15245 | Cup | 62.00 mm OD | With 15123 |
| 25580 | Cone | 44.45 mm bore (1 3/4") | Dexter, ModCon, Kimberley inner |
| 25590 | Cone | 45.62 mm bore | 25590 parallel |
| 25520 | Cup | 82.93 mm OD | With 25580 or 25590 |
| 30210 / HR30210 | Cone and cup | 50 mm bore, 90 mm OD | 2, 2.5 and 3 t inner |
| L44649 | Cone | 26.99 mm bore (1.0625") | American import and Trojan outer |
| L44610 | Cup | 50.29 mm OD | With L44649 or L44643 |
| LM48548 | Cone | 34.93 mm bore (1 3/8") | Trojan inner |
| LM48510 | Cup | 65.09 mm OD | With LM48548 |
Source: bearing makers' published part data and an axle maker's bearings catalogue for HR30210 (see Sources). Read 27 and 28 September 2026.
Two numbers catch people out. 15123 and LM67048 have the same 31.75 mm bore, but their cups differ (62.00 mm against 59.13 mm), so they don't swap. And LM29710 and LM48510 cups are the same size, but their cones are not.
Load ratings belong to the axle, not the bearing kit
The "1.5 tonne", "2 tonne" or "3 tonne" in a kit's name is not a load rating, and you'll see different figures quoted for the same bearings. An axle maker's stub axle list shows why: it rates the axle, and the same LM bearings appear on axles with different ratings. We don't quote load ratings for bearings or kits. Fit new bearings with the same numbers as the ones that came out, and if you need your trailer's rating, ask the trailer or axle maker.
Standard or marine trailer bearing kit?
Caravans and box trailers generally take a standard kit. Boat, jet ski and other trailers that go in the water take a marine kit. In our marine kits the cones and cups are the same as in the standard kit; the seal is the difference. One axle maker's catalogue lists two-piece marine seals for LM and SL. It's fine to use a marine seal on a road trailer, and we recommend marine seals on anything that goes in the water.
Which kit fits
Every kit below includes the inner and outer cones and cups, plus seals.
- Pick the 2x standard Holden kit LM67048/LM11949 for a road trailer with Holden bearings.
- Pick the 2x standard Ford kit L68149/LM12749 for a road trailer with Ford (slimline) bearings.
- Pick the 2x marine Holden kit or the KOYO 2x marine Ford kit for a boat trailer.
- Pick the 2x composite kit LM67048/LM12749 if your inner cone reads LM67048 and your outer reads LM12749.
- Pick the 2x L68149 parallel kit if both cones read L68149, or the 2x 25590/25520 kit if they read 25590 (our listing says it fits various MDC campers). More on the two in Parallel trailer bearings explained.
- Pick the 1.5 tonne, 2 or 2.5 tonne or 3 tonne kit for a caravan whose numbers match those rows in the chart. More on these in 2 and 2.5 tonne caravan wheel bearings.
- Pick the Dexter AU kit (33940 seal, listed as 1.93" inside) or the Dexter US kit (34040 seal, listed as 2.250" inside) for Dexter 2 tonne hubs. Measure the old seal's inside diameter to tell which, as our Dexter kit guide explains.
- Pick the 2x American import kit for an imported boat trailer with an L68111 inner cup. Our listing names Bayliner, Malibu, Mastercraft and Tige among others.
Single, KOYO and dust cap versions of most of these are in the trailer bearing collection.
Questions people also ask
What are the types of trailer bearings?
Trailer wheel bearings are tapered roller bearings: a cone with rollers that sits in a cup. Most trailers have a bigger inner and a smaller outer bearing on a stepped axle. A parallel axle uses the same bearing on both sides.
Is LM12749 Holden or Ford?
LM12749 is the Ford (slimline) outer cone, 21.99 mm bore. It usually pairs with an L68149 inner, but composite kits pair it with a Holden LM67048 inner.
Is LM11949 Holden or Ford?
LM11949 is the Holden outer cone, 19.05 mm (3/4") bore. It pairs with the LM67048 inner cone.
Do Ford and Holden trailer bearings share the same hub bore?
Yes. Both fit the same hub bores, 59.10 mm inner and 45.20 mm outer. The cones differ, so the bearings still aren't interchangeable on the axle.
If I use a Ford hub on a Holden axle, which bearings do I need?
Holden bearings. The bearing cones have to fit the axle, and Holden and Ford cups both fit the same hub bores.
Related reading
- Holden or Ford trailer bearings? How to tell
- Parallel trailer bearings explained: L68149/L68110 vs 25590/25520
- Identifying trailer hub types, stud patterns and PCD
Sources
- Timken, part pages for LM67048, LM67010, LM11949, LM11910, L68149, L68110, L68111, LM12749, LM12710, LM29749, LM29710, 15123, 15245, 25580, 25590, 25520, L44643, L44649, L44610, LM48548 and LM48510, https://cad.timken.com/item/all-categories/tapered-roller-bearings-2/lm67048 (and the matching page for each number), read 27 and 28 September 2026.
- Timken, metric part pages 30210 (https://cad.timken.com/item/all-categories/tapered-roller-bearings-2/30210) and X30308 / Y30308 (https://cad.timken.com/item/tapered-roller-bearings-ts-tapered-single-/tapered-roller-bearings-ts-tapered-single-metric/x30308-y30308), read 28 September 2026.
- AL-KO, Bearings catalogue, pp. 33 to 37, https://alko.com.au/wp-content/uploads/2020/04/Bearings.pdf, read 27 and 28 September 2026.
- AL-KO, Stub Axles catalogue, p. 18, https://alko.com.au/wp-content/uploads/2020/04/Stub-Axles.pdf, read 28 September 2026.
Checked against the Timken part pages, the AL-KO bearings and stub axle catalogues and Bearings Express product data on 27 and 28 September 2026.
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