tony R said:I've always found my tyres nastily tight (Top Touring and then Top Touring 2000) but rarely suffer
punctures so rarely experience the nastiness. Once they're on I've always pumped them up as hard
as I can, contributing to rareness of punctures I assume.
Firm tyres may be more puncture resistant than very soft ones, but I doubt rock-hard ones will help
that much more in this respect.
Quoted message said:I recently borrowed a wee pressure gauge and was/am slightly concerned when the needle flew round
to 110psi (the gauge's maximum point).
First, need to be sure gauge is getting an proper reading by unsticking the valve first with a quick
tap ...but then that'll release some air (as might using the gauge itself), thus reducing the
pressure! (One reason why I don't bother using separate gauges).
Quoted message said:The tyres are rated to 75psi. Am I risking terrible things by this malpractice?
It's often reasonable to pump beyond the manufacturer's recommended limit*, but I think 110psi is
probably OTT for these tyres. 90, maybe 95, would be a more reasonable max, unless, to be frank,
your bike is carrying the equivilent collective weight of a large group of Chinese girls that have
been over-indulging on hamburgers whilst rehearsing their circus act in the UK.
Apart from providing a bumpy ride, an over inflated tyre will be more likely to get cut by stones
and debris, and won't grip as well as a correctly inflated one.
* See: sheldonbrown.comtyres.htmlOpen ↗
Quoted message said:Given I've been riding around like this for years presumably the risk is a small one, or I'm using
up all my luck.
Maybe, but you could go round the corners faster with softer tyres and have a more comfy ride
in general.
Quoted message said:Perhaps the tyres' ability to take this abuse is related to their b*****d-tightness?
It would help them blowing off the rims - although probably even more pressure and/or some mountain
descending with the brakes on would be required for that to happen.
Quoted message said:I was thinking of switching to Schwalbe Marathons next time. Anyone know if they'll take similar
over-inflation?
Don't know about Marathons, but like you, I used to have the habit of over-inflation, but I'm trying
to get more sensible these days. As SB says, there /should/ be some bulge there when you look down.
~Pete "I don't do innuendo" Biggs