I am "big boned" as you put it! (5.11 and 100kg, that's what 15 years of rugby does to you...) so I guess that adds to the problem of underinflated tyres.
Hi,
Big people need fatter tyres and it doesn't get much more complicated than that.
e.g. for a 70kg person running 23mm tyres at ~ 100 psi a 100kg person should
be running 28mm tyres at ~ 100 psi for a similar road experience.
FWIIW at average weight I run a near slick 30mm rear tyre and a semi slick
32mm front tyre, at the lower pressures they afford the extra suspension
far outweighs IMO any advantage of skinnier tyres on typical roads.*
Back typically about 60 psi and front about 45psi I'd guess.
Yes they are both not light, both puncture protected, no punctures so far.
rgds, sreten.
* hitting a nice stretch of good tarmac the bike clearly goes faster,
and would go even faster on racier tyres, but I don't fancy the
racier tyres on typical UK roads, its a compromise.