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Discussion Starter · #1 ·
Anyone had the same experience as me....

2 rear tyres with otherwise good tread depth but worn to the canvas on inner edges. Much worrying about camber/toe and a £60 laser alignment (largely OK) - but then realised I'd been driving over a particular speed "cushion" twice a day and then recalled it had jagged edges.
Looked this up online and its all over the web like a rash!
Got new tyres and now go over them one wheel on and one off - not straddling them - tyres perfect so far.

These cushions are apparently designed be narrow enough to let buses and ambulances etc straddle them, whilst mere mortals have to bump over them. Most cars, mine anyway, have to run the tyres along the edge so the inner corners take all the load and get worn away.

Some people have tried to get answers from Dept of Transport but most have been stonewalled.
 

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Discussion Starter · #3 ·
Maybe - but surely not as if a 45 deg chamfer had been machined onto the tyre edge.
I've replaced nothing since and the tyres are wearing perfectly (if there can be such a thing!), so I'm convinced it's the speed cushions - until something changes my mind :)
 
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