tyre size

Automotive tires are described by an alphanumeric tire code (in North American English) or tyre code (in Commonwealth English), which is generally molded into the sidewall of the tire. This code specifies the dimensions of the tire, and some of its key limitations, such as load-bearing ability, and maximum speed. Sometimes the inner sidewall contains information not included on the outer sidewall, and vice versa.
The code has grown in complexity over the years, as is evident from the mix of SI and USC units, and ad-hoc extensions to lettering and numbering schemes. New automotive tires frequently have ratings for traction, treadwear, and temperature resistance, all collectively known as the Uniform Tire Quality Grading.
Most tires sizes are given using the ISO metric sizing system. However, some pickup trucks and SUVs use the Light Truck Numeric or Light Truck High Flotation system.

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  1. A

    Tyre size

    Hi all, New here. Just took ownership of a trophy hybrid plus, quite enjoying the drive so far. I tend to run all season tyres as i visit other places that may need 3 peak marking. I notice the 195 55r16 isnt very common. Both crossclimate and vector4 season offer this size but it’s quite abit...
  2. takhy

    Wheel size too small?

    Hi! I tried changing to winter wheels today on my MG4 trophy extended range. The winter wheels are 215/50 R17 size and seem to be pressing down on the calipers in the front. Is this size too small? Manual tells me it should be good. Thanks in advance.
    • takhy
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    • Forum: MG4 EV Forum
  3. B

    Tyre size comparison

    Hi, i have phase 1 luxury (24 plate) unfortunately the phase 2 was out of stock :(. I noticed that the phase 2 and phase 1 have different wheel sizes. 235/45R18 vs 215/50R17 (as the current SE) My question is there is any differences in terms of car stability at curved roads/sporty...
  4. mechfurkan

    MG4 SE SR - 215/50/17 vs 225/50/17

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  5. L

    Tyre size?

    HELP! So my car got a puncture on the way back to my mums house so Ive left it there overnight and borrowed her car. Car is a salary sacrifice so called the company to book a repair/replacement and have been asked the tyre size? I didn’t think to look last night and mum will not understand what...
  6. P

    Xpower tyre size change 235/40/18

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  7. MeteUlk

    MG HS rim size and experiences

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  8. A

    Another tyre question

    MG5 Trophy - on checking the tyre websites (e.g. black circles and asda) I put in my reg no and it says that the correct tyres are 215/55/17. However, the tyres fitted to my car are 215/50/17 - Premitra 5. Is this correct, and what size are your 17 inch wheels fitted with?
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  9. D

    Tyre size

    What size are the tyres? Anyone looked to see if you can get CrossClimate tyres?
  10. C

    Snow & Tyre Size

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