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going from 100psi to 70psi would be quite a big jump that set the alarm bell ringing in your head
Sounds about right. Going from 23mm tyres to 25mm to now 28mm means I just have to get used to lower pressures. I'll just steadily drop the pressure bit by bit. Quite pleased 28mm tyres fit my old school steel track frame though!
Yeah, front would be .45x70+5 = 36.5 kg, which would result in about 60 psi (or 4.1 bar) indeed.
If the charts says so! I will try it. Thanks.