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Old 15-06-2006, 05:02 AM
ratwing ratwing is offline
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Default 125 x 15" tyre load rating

Anyone got 125 x 15" Uniroyal radials? I need to know the load rating, either in weight or the letter on the sidewall. (I'm asking because I can't get this info from the Uniroyal website ) Cheers guys
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  #2  
Old 15-06-2006, 08:38 AM
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Lightbulb any help?

Ah crap,i'll type link out


http://www.conti-tyres.co.uk/contibi....php#loadindex


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For Continental motorcycle tyres
Tyre identification
Top Speeds Speed symbol J K L M N P Q R S T U H V Z W Y
Speed (km/h) 100 110 120 130 140 150 160 170 180 190 200 210 240 >240 270 300
Speed (mph) 62 68 75 81 87 93 99 106 112 118 124 130 149 >150 168 186
Load Index (LI) LI lbs KG LI lbs KG LI lbs KG LI lbs KG LI lbs KG
19 112,7 77,5 36 181,7 125,0 53 299,4 206 70 487,0 335,0 87 792,2 545,0
20 116,3 80,0 37 186,1 128,0 54 308,2 212,0 71 501,5 345,0 88 814,0 560,0
21 119,9 82,5 38 191,9 132,0 55 316,9 218,0 72 516,0 355,0 89 843,1 580,0
22 123,6 85,0 39 197,7 136,0 56 325,6 224,0 73 530,6 365,0 90 872,2 600,0
23 127,2 87,5 40 203,5 140,0 57 334,3 230,0 74 545,1 375,0 91 894,0 615,0
24 130,8 90,0 41 210,8 145,0 58 343,0 236,0 75 562,5 387,0 92 915,8 630,0
25 134,5 92,0 42 218,0 150,0 59 353,2 243,0 76 581,4 400,0 93 944,8 650,0
26 138,1 95,0 43 225,3 155,0 60 363,4 250,0 77 598,9 412,0 94 973,9 670,0
27 141,7 97,5 44 232,6 160,0 61 373,6 257,0 78 617,8 425,0 95 1003,0 690,0
28 145,4 100,0 45 239,8 165,0 62 385,2 265,0 79 635,2 437,0 96 1032,1 710,0
29 149,7 103,0 46 247,1 170,0 63 395,4 272,0 80 654,1 450,0 97 1061,1 730,0
30 154,1 106,0 47 254,4 175,0 64 407,0 280,0 81 671,6 462,0 98 1090,2 750,0
31 158,4 109,0 48 261,6 180,0 65 421,5 290,0 82 690,5 475,0 99 1126,5 775,0
32 162,8 112,0 49 268,9 185,0 66 436,1 300,0 83 707,9 487,0 100 1162,9 800,0
33 167,2 115,0 50 276,2 190,0 67 446,3 307,0 84 726,8 500,0 - - -
34 171,5 118,0 51 283,5 195,0 68 457,9 315,0 85 748,6 51 - - -
35 175,9 121,0 52 290,7 200,0 69 472,4 325 86 770,4 530,0 - - -
Conversion chart motorcycle tyre sizes (approximation) Metric Inch Alpha
80/90 2.75, (3.00) (MH 90)
90/90 3.00, (3.25), (3.60) MH 90
100/90 3.25, (3.50), 3.60 MJ 90
110/90 3.50, (3.75), 4.10 ML 90
120/90 4.00, 4.25, 4.25/85, 4.60 MN 90, MP 90
130/90 4.50, 5.00, 5.10 MT 90
140/90 5.50 MU 90
Please note: Values given in brackets are theoretically possible, but not recommended.

American Alpha-Indication Alpha Size Alpha Size
H 3.15 inch R 4.50 inch
J 3.50 inch S 4.75 inch
L 3.65 inch T 5.10 inch
M 3.75 inch U 5.60 inch
N 4.10 inch V 5.90 inch
P 4.25 inch
Please note that any difference from the original tyre size will affect the rolling circumference and the tyre clearance will need to be checked. Pay attention to the load index and adjust inflation pressure of the tyre accordingly. Follow the instructions of the vehicle manufacturer.

Mileage
A tyre which can achieve high mileage is an asset because a longer lifespan leads to lower costs.

The mileage attained by motorcycle tyres and in particular that by the rear wheels of performance bikes cannot be measured in the same way as that of car or truck tyres. Because the motorcyles themselves weigh comparatively less they are able to accelerate faster and during this acceleration the rear tyre slips. This slipping leads to wear on the tyres.

A pillion passenger whose weight is solely placed on the rear tyre helps to prolong the life of the tyre. The rear wheel is pressed onto the road with more force, there-by reducing the amount of slipping. The tyre therefore lasts longer.

Motorcycle tyres on a rolling road
While testing motorcycles on a rolling road, very high tyre temperatures may occur. Because of the smooth surface of the rollers the tyres slip and become hot during testing. Afterwards the tread is often visibly destroyed. It is advisable to use worn tyres for the rolling road session. For safety reasons we recommend that after the test the tyres are removed and discarded.

Tread depth
Worn tyres influence the handling of a motorcycle and thereby reduce the performance required for safe riding. The recommended minimum tread depth is 2mm.

Valve nut (tube type)
Only a fitting aid. Should be twisted against the valve cap after fitting the tyre.

Directional Arrows
Where a tyre has a direction of rotation arrow moulded upon it, the tyre must be fitted so that the relevant front or rear tyre follows the direction of rotation when the motorcycle is being ridden forward. Road handling and tyre wear may worsen, or damage to the tyre can occur in extreme circumstances if these instructions are not followed.

Tubeless and tubetype tyres
It is generally true that the fitting of tyres to a motorcycle should be in accordance with the stated manufacturer's specification for the specific model, otherwise the warranty may be rendered invalid. For example, if tubeless tyres are prescribed then tubeless tyres must be fitted. The same is true for tubetype tyres.

If no appropriate indication has been given in the vehicle specification, then in the following circumstances either tubeless or tubetype tyres can be fitted.

For Continental motorcycle tyres
All TL/TT-sidewalled tyres can be used with a tube without decreasing the speed range (except Z rated radials).
ALL Continental tyres labelled TL can be fitted to rims/wheels marked Tubeless. They can also be fitted on Tubed Type rims/wheels with a correctly sized Continental inner tube.
If Sport Attack, Road Attack and ContiForce tyres (Z rated radials) are fitted on Tubed Type rims/wheels with Continental inner tubes, the maximum speed is then restricted to 130 mph (210 km/h, from Z to H speed rating).
Continental tyres labelled TT can only be fitted on Tubed Type rims/wheels and must be fitted with a correctly sized Continental inner tube.
Please note that the maximum speed for tubeless tyres fitted with an inner-tube is 210 km/h (approx. 130 mph).
Example:
100/90 - 18 56H
(according to vehicle papers) In this case a 100/90 - 18 56V TL with an inner-tube could be fitted. Alteration of the vehicle papers is not necessary.

If new Continental tyres are fitted, new Continental inner-tubes must also be fitted.

If new Continental tubeless tyres are fitted, new valve must also be fitted.

Miscellaneous
m/c tyres from Continental meet the highest quality standard according to ISO 9000, ISO 9001 and ECE.

Tyre identification
The tyre identification number which has been used thus far gives information on:

the tyre width (in inches or mm)
the ratio: height / width
the registered maximum speed
the rim diameter
the tyre load
Examples:
3.50-18 62P TT reinforced
3.50 = tyre width 3.5 inches

- = diagonal casing construction

18 = rim diameter in inches

62 = load index - see page 80 for further information

P = speed index, symbol for registered maximum speed (P = 150 km/h, approx. 93 mph)

TT = tubetype reinforced = increased tyre load capacity

150/70 B17 69H TL
150 = tyre width in mm

/70 = ratio of height to width = 70 : 100

B = bias belted (construction type)

17 = rim diameter in inches

69 = load index - see page 80 for further information

H = speed index, symbol for registered maximum speed (H = 210 km/h approx 130 mph)

TL =tubeless

An older type of identification from ECE/ETRTO/JATMA is for example:
130/90 H16, which is identical to 130/90 - 16 67H

Further examples:
180/55 ZR 17 (73W) TL
180 = tyre width in mm

/55 = ratio of height to width = 55 : 100

ZR = radial construction

17 = rim diameter in inches

TL =tubeless

(73) = load index (see page 80)

(W) = > 270 km/h

Load and speed index in brackets allows higher speed than 270 km/h. The load need to be reduced according ECE and ETRTO.

MT 90-16 T 71H TL
M = motorcycle

T = symbol for tyre width, T = 5.10 inch

90 = ratio of height to width = 90 : 100

16 = rim diameter in inches

T = rim contour

71 = load index - see page 80 for further information

H = speed index, symbol for registered maximum speed H = 210km/h (approx 130 mph)

TL =tubeless

E4 R75-000 6224
E4 = country of approval

R75 = ECE Guideline

000 6224 = approval no.

Please note that it is not legal to use m/c tyres without ECE approval in the U.K. and Germany. Other European countries will follow.

We wish you safe and enjoyable riding.
Your Continental motorcycle team.

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  #3  
Old 15-06-2006, 11:13 AM
ratwing ratwing is offline
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Um, ta for that but I'm actually after the load rating for this specific tyre. (So I know it'll be up to the job or not on the front of my trike - I don't want a wide tyre unless I really can't avoid it)
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Old 16-06-2006, 08:44 AM
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What kind of wheel do you have? can't find any reference to a 125 x 15 in either euro or US tyre manuals.

If you can get the rim size and type (J, MT, etc) and what overall diameter you want I should be able to give you some ideas. Tyre load ratings are tied into their size, the only variations occur if tyre comes in both standard and reinforced.

Cheers

Chris
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Old 16-06-2006, 11:19 AM
ratwing ratwing is offline
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Its a Citroen 2CV wheel with the middle (the dished bit with the stud holes) cut out and the rim welded around a one-off hub/wheel to take brake discs. I don't know what the rim type is.
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Old 16-06-2006, 01:13 PM
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Guess it'll be a car type J rim most likely (then again as it's French )

Ok nearest I can get is 135/80 R 15 which could also be marked 135R15. The load index for this size of tyre is 73 which equates to max loading of 365kg.

I would reckon that if you can source a 125 it won't be too much lower ( a 125/80 R 13 is rated at 65 which is 290 kg)

Good luck
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Old 16-06-2006, 06:37 PM
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trikerdan trikerdan is offline
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Default msva question

On the subject of tyres, is it ok (for msva test) to have a sidecar tyre on the front of my trike?
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Old 19-06-2006, 08:23 AM
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Yep as long as it meets the other requirements (load, speed, construction suitable for rim etc) we only poo poo sidecar tyres on solos.
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  #9  
Old 19-06-2006, 05:25 PM
ratwing ratwing is offline
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Cheers Chris (I even went for a walk around the car parks I used at the weekend looking for a 2CV but didn't see one)
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  #10  
Old 19-06-2006, 10:14 PM
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i have a 2cv tyre on a old vmax rear rim (slightly modified) on the front of my trike can have a look if you like had to change it for msva think the load rate is 368kgs will have a look
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