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I did try to explain that 85psi on 25mm rims with a 25c tyre would be nigh on unrideable.
Why?
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I am also interested in how 25mm tyres at 85psi would be unrideable.
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Technically they're right, as if you rode with tyres under the manufacturer specification, it's no longer warrant.
However, even at 55psi (I ran them 70 read, 55 front), it shouldn't really cause this.
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@dglshrn
Sigma sport have very nicely agreed to replace my corsa g+ because the tread came away from the casing after 1500 or so miles. I wasn't expecting them to, so dead pleased.
I was told by one member of staff who jumped on the email chain with the person who was arranging the return that it was my fault they'd delaminated because I was running them at 55psi on 25mm rims despite the advised '85psi' written on the side of the tyre. I did try to explain that 85psi on 25mm rims with a 25c tyre would be nigh on unrideable, and the rims were only guaranteed to 60psi but he accused me of using 'mismatched components'.
I should be getting a new set in the post though, which is pretty amazing customer service tbf.