100 normal, 110 race, 120 smooth race, 90 if my arse is sore or in winter.
Don't they make a loud bang if one goes off! Especially indoors in front of the telly when the wife is asleep on the sofa. Though it was very funny!
I think it is because of width of tyre and relative footprint/ area in contact with the road. A thin racing tyre needs higher pressure than a mtb tyre because of the area supporting the rider. (Something like comparing a stiletto heel with a trainer heel, the first needs to be harder because of a smaller area carrying the weight). Follow what is on the side of the tyre and you can't really go wrong.
On the bit about unscrewing valves and running the wrong pressure I did both of these, but then gained a couple of free mph when I worked out what I was doing wrong!
100 on 25mm tyres and 110 on my 23mm tyres.
Bought a track pump for it after spending an entire day with my Dad and Hubby saying you could get them to that pressure with hand pump or electric pump.
Once disproved a late dash to Halfords and my point was proven.
Next is to convince them as to how the electric circuits in my house work.
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