E46 M3 tyre ratings

[The Restorer]

Anyone know what the recommended tyre ratings are for the E46 M3. Most concerned with load index.

Just got a set of tyres with a rating of 89 (580kg at 51psi) and want to know if these are suitable?

What are other folks running?

Thanks,

Mo

[The Restorer]

35 front and 40 rear's not the load index... The load index is usually something along the lines of 91Y.

[jeffm3]

You must when changing tyres for a different type or size make sure you have the same ratings speed, weight etc. or more, never go less, with weight ratings if you go less it will cause heat in the side wall of the tyre making it poss. fail,

225/45 ZR 18's michelin pilot sport @ 33/41psi 615kg @51psi front (gross axle weight ratings) cars gross weight load limit for front axle = 970kg
255/40 ZR 18's michelin pilot sport @ 35/48psi 690kg @ 51psi rear (gross axle weight ratings) cars gross weight load limit for rear axle =1140kg

225/40 ZR 19's mich ps @ 33/41 psi don't know weight ratings but guess they will be if not the same very close
255/35 ZR 19's mich ps @ 35/41 psi again don't know weight rating for this tyre,

the two different psi e.g @33/41 33 is for low load 2 / persons and 41 is for heavy load / 4 persons
kerb weight with 90% fuel > gross without optional extras = 1570kg
permissable gross weight 2000kg

91/y the 91 is the weight it can carry @ Y which is the speed rating Y= 186 mph or 300km/h
for exsample 89Y would mean 1279 pounds @ a max speed of 186

the spec above is the standard for a e46 ///M3 wouldn't think of putting less rated tyres on it DANGEROUS.............

hope this helps

think that's complicated if you use a trailer it gets silly

jeff

Edited by jeffm3 on Sunday 8th June 02:47

Edited by jeffm3 on Sunday 8th June 02:47

[jeffm3]

Load Capacity
Index Pounds
71 =761
72 =783
73 =805
74 =827
75 =853
76 =882
77 =908
78 =927
79 =963
80 =992
81 =1,019
82 =1,047
83 =1,074
84 =1,102
85 =1,135
86 =1,168
87 =1,201
88 =1,235
89 =1,279
90 =1,323
91 =1,356
92 =1,389
93 =1,433
94 =1,477
95 =1,521
96 =1,565
97 =1,609
98 =1,653
99 =1,709
100 =1,764
101 =1,819
102 =1,874
103 =1,929
104 =1,984
105 =2,039
106 =2,094
107 =2,149
108 =2,205
109 =2,271
110 =2,337

Speed Ratings

Index Maximum Speed (MPH)
M =81
N =87
P =93
Q =99
R =106
S =112
T =118
U =124
H =130
V =149
Z =149+
W =168
Y =186
If the tyre is rated over 149+ mph it may have ZR on it but must have ZR if rated above 186 mph

Uniform Tire Quality Grading (UTQG)

Category Measurement
Treadwear
A comparative rating, with 100 as a base – a tire graded 150 would wear about one-and-a-half times longer than one graded 100.

Traction
Graded highest to lowest for their ability to stop on wet pavement:
• AA
• A
• B
• C

Temperature
Graded highest to lowest for their resistance to heat:
• A
• B
• C (minimum required by law)

jeff

Edited by jeffm3 on Sunday 8th June 02:55