"harry" wrote in message
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On Friday, 12 April 2019 20:49:08 UTC+1, ARW wrote:
Got a flat. A simple swap, but the spare has 50MPH stickers on it.

So why would the spare wheel have a maximum speed limit of 50MPH on it
when it has the same sized tyre on it as the flat one? The only
difference I can see is that the spare is not an alloy wheel.

The reason is there are less cords in it.
Presumably to save cost/weight.
All tyres have a speed rating.
https://www.oponeo.co.uk/tyre-article/tyre-speed-rating

very true...