I don't have speed bumps on my wheels. Boom Boom!

Sorry Hants.

I know what you mean though - I worry about this daily, since Oxford has some of the most ghastly "traffic calming" measures imaginable. However, I have yet to attribute any mechanical problem to them. The sheer discomfort of riding over the b***dy things and the chance that they will actually cause a crash is something else. Nor do they make car traffic behave any more sensibly...

Cheers,

Ed