Trailer Wheel: 185x14 8ply 5x6" pcd

14" offset wheel rim with 185x14 8ply tyre fitted, suits 5stud, 6"pcd hubs. Colour may vary from image, silver or white.

  • Tyreline
  • SW485N8
  • World Wide
£108.41INC
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Trailer and Caravan Tyre Load & Pressure Ratings

A table covering popular trailer sizes is given below.

Tyre size Max speed
100 km/h 60 mph 130 km/h 81 mph
Axle Load kg PSI/Bar Axle Load kg PSI/Bar
400 x 8 (4ply) 540 60/4.2 - -
400 x 8 (6 ply) 680 75/6.2 - -
500 x 10 (6 ply) 860 50/3.5 - -
5.20 x 10 616 32/2.2 - -
145 x10 693 35/2,4 630 32/2.2
145 x 10 (R/F) 781 42/2.9 710 39/2.7
140/70 x 12 1060 62/4.3 - -
155/70 x 12 1800 90/6.2 1636 87/6.0
145 x 13 825 53/3.7 750 32/2.2
155 x 13 935 35/2.4 850 32/2.2
155 x 13 (R/F) 1045 42/2.9 950 39/2.7
165 x 13 10445 36/2.5 950 33/2.3
165 x 13 (R/F) 1166 45/3.1 1060 42/2.9
175 x 13 1166 36/2.5 1060 33/2.3
175 x 13 (R/F) 1276 45/3.1 1160 42/2.9
175 x 13 (6ply) 1407 54/3.75 1340 54/3.75
183 x 13 (6ply) 1500 54/3.75 1460 54/3.75
185/70 x 13 (Avon 950) 1900 87/6.0 1800 87/6.0
175 x 14 (6ply) 1491 54/3.75 1420 54/3.75
175 x 14 (8ply) 1628 65/4.5 1550 65/4.5
185 x 14 (6ply) 1628 54/3.75 1550 54/3.75
185 x 14 (8ply) 1785 65/4.5 1700 65/4.5
195 x 14 (6ply) 1785 54/3.75 1700 54/3.75
195 x 14 (8ply) 1995 65/4.5 900 65/4.5
600 x 16 (6ply) 1533 52/3.6 - -
650 x 16 (6ply) 1890 62/4.3 - -
750 x 16 (6ply) 2100 51/3.5 - -

Trailer and Caravan Tyre Speed Symbols:

The tyre SPEED SYMBOL indicates the speed at which the tyre can carry a load corresponding to its Load Index under service conditions specified by the tyre manufacturer. For caravans and light trailers see conditions specified by E.T.R.O 1991, passenger car tyres section 13, reproduced below.

Speed
Symbol
Maximum car speed for which tyre is suitable
km/h mph
J 100 60
K 110 69
L 120 75
M 130 81
N 140 87
P 150 93
Q 160 100
R 170 106
S 180 113
T 190 118
U 200 124
H 210 130
V 240 150

Trailer and Caravan Tyre Load Index

The LOAD INDEX is a numerical code associated with the maximum load a tyre can carry at the speed indicated by its Speed Symbol under service conditions specified by E.T.R.O 1991, passenger car tyres section 13, reproduced below.

Load
Index
Load
kg
Load
Index
Load
kg
Load
Index
Load
kg
Load
Index
Load
kg
Load
Index
Load
kg
Load
Index
Load
kg
60 250 71 345 82 475 93 650 104 900 115 1215
61 257 72 355 83 487 94 670 105 925 116 1250
62 265 73 365 84 500 95 390 106 950 117 1285
63 272 74 375 85 515 96 710 107 975 118 1320
64 280 75 387 86 530 97 730 108 1000 119 1360
65 290 76 400 87 545 98 750 109 1030 120 1400
66 300 77 412 88 560 99 775 110 1060 121 1450
67 307 78 425 89 580 100 800 111 1090 122 1500
68 315 79 437 90 600 101 825 112 1120 123 1550
69 325 80 450 91 615 102 850 113 1150 124 1600
70 335 81 462 92 630 103 875 114 1180 125 1650

Trailer and Caravan Tyre Markings & Condition:

Car, caravan and trailer tyres must have at least 1.6mm of tread over the central 75% of their width for their entire circumference, although a tyre with under 3mm offers little grip in the wet. Tyres must be free from deep cuts and bulges (which indicate they are breaking up) and it is illegal to use cross-ply and radial tyres on the same axle. (Make sure that the tyres you fit to your trailer are of the correct rating.)

Additional Tyre information:

See links above for detailed tables on Tyre Load Index, Tyre Speed Symbols and Tyre Load & Pressure Ratings.

Tyre Sidewall Markings

The illustration below provides an explanation of the markings currently found on a tyre sidewall.

Trailer Tyre Markings

* do not apply in the U.K.

Retreads - must also show either 'RETREAD' or 'REMOULD' on the sidewall, together with 'BSAU 144' in place of ECE Type Approval Mark.

Aspect ratio - ratio between the height of the sidewall and the width of the tread, expressed as a percentage. In the example above, the figure is 70%.

Nominal section width - on radial tyres this is expressed in millimetres, on cross ply tyres, inches are used.

Trailer and Caravan Wheel Bolt Tightening

When refitting a trailers' road wheels it is ESSENTIAL that the wheel nuts/bolts are tightened to the recommended torque figure and in the correct sequence. To neglect this is too run the risk of either the nuts/bolts working loose and the wheel coming off (not tight enough), or damage to and possible shearing of the nut/bolt (over tightened). 

The sequences necessary to correctly carry out this work are as follows:-

Torque figures : Wheel Bolts

AL-KO Indespension
M10 - 40 lb. Ft / 54 Nm M12 - 55 lb. Ft / 74 Nm
M12 - 65 lb. Ft / 88 Nm M14 - 60 lb. Ft / 81 Nm
M14 -108 lb. Ft /146 Nm  
Ifor Williams Avonride
M12 - 65 lb. Ft / 88 Nm } used with M12 - 65 lb. Ft / 88 Nm
Torque figures: Nuts
Peak Trailers Indespension
M12 x 1.5 - 75 lb. Ft / 102 Nm 3/8" UNF - 42 lb. Ft / 57 Nm
M16 x 1.5 - 145 lb. Ft / 197 Nm 7/16" UNF - 50 lb. Ft / 67 Nm
3/8" UNF - 45 lb. Ft / 61Nm 1/2" UNF - 56 lb. Ft / 76 Nm
1/2" UNF - 80 lb. Ft / 109 Nm 5/8" UNF - 85 lb. Ft / 115 Nm
Avonride
1/2" UNF - 65 lb. Ft / 88 Nm 5/8" UNF - 79 lb. Ft / 108 Nm

It is ESSENTIAL that the torque settings are re-checked after the first 25 miles or 50 km and subsequently before each journey. 

Trailer and Caravan Wheel Information

There are many different types of wheels fitted to trailers, many of them specifically for trailer use. The practice of using car wheels, rather like that of using car brakes, has largely died out.

Wheels, like tyres, have a maximum weight capacity determined by the manufacturer.

Where a wheel/tyre unit maximum weight capacity is declared, if either of the two parts has a different loading capacity, the declared figure will be the lower of the two. Reference should always be made to the supplier if there is any doubt.

The technical terms around a wheel are frequently misused and "rim" and "wheel" are often misused. The main factors to bear in mind, particularly when ordering replacements are as follows:

Rim: The rim serves as the seat for the tyre.

Wheel Disc: The wheel disc connects the rim with the hub.

Wheel: The wheel is the entire assembly, consisting of the rim and disc.

Rim width: The width inside the wheel flanges and is normally expressed in inches e.g. 4.50.

Rim diameter: The diameter of the wheel just inside the rim, where the inner edge of the tyre bead sits and normally expressed in inches e.g. 13"

Offset: The distance between the seating surface of the wheel/hub and the vertical centre line of the wheel/tyre unit. This can be positive offset, as shown above, where the vertical centre line is behind the seating point, when the wheel is fitted to the hub. Negative offset is the opposite and is sometimes known as inset.

Centre disc: There are also centre disc wheels that have neither positive nor negative offset; i.e. The vertical centre line is in exactly the same plane as the seating point.

Centre bore: The hole in the centre of the wheel disc, designed to accommodate the bearing boss and grease or dust cap. Size expressed in millimetres.

Stud or bolt holes: The holes by which either the studs or bolts fasten the wheel to the hub. Normally 4 or 5 in number, the size is determined by the size of the stud or bolt, either metric or imperial. The usual way of expressing the configuration incorporates both these factors, e.g.

4 x M12 = 4 off 12mm studs or bolts.
5 x M14 = 5 off 14mm studs or bolts.
4 x ½" = 4 off ½" studs.

The seating of the stud hole is also important and must correspond with the seating on the stud or wheel bolt. These are either conical (Straight side walls inside the seating) or spherical (curved side walls inside the seating) but there are some continental wheels with flat cylindrical holes.

Pitch circle diameter (P.C.D.): The diameter of the circle around which the studs are arranged. Measurement given in metric or imperial e.g. 100mm, 112mm, 5.5", 4". The measurement of a 4 stud fixing is simply the distance between the centres of two opposite stud holes.

A five stud fixing is calculated by taking the measurement from the centre of a stud hole to the edge of the centre bore x 2 + the diameter of the centre bore.

Studding patterns: The correct way to express a studding pattern, either of a wheel or of a hub is an amalgam of the P.C.D and the Stud/Bolt hiles.
E.g. 4 x M12 on 100mm
4 x 1/2" on 5.5" (or 139.7mm)
5 x M12 on 112mm

Two piece wheels: Although rarely used as original equipment in today's light trailer market, a number of older trailers may be fitted with two piece wheels, particularly those using 600 x 9 tyres. It is vitally important that the nuts holding the two sections together are NOT loosened whilst the tyre is still inflated.

Essential information when refitting trailer road wheels: Wheel Bolt Tightening

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Zone Area < £6 £6 - £18 £18 - £66 > £66
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* 1 Heavy and bulky items may incur a surcharge

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