Tyre Warming?

Ok then here's one for you all.

All other things being equal, how much extra grip (guesstimate %) would you say X tyres give cold vs warm vs hot (optimum temp)?

Or is that too open ended a question?

dependant on tire, like slick's have next to no grip when cold but when hot stick like sh*t but road tires grip well (ish) when cold and ok to good when hot

It makes a difference. I ran the SV on bias ply ME880s (nobody's first choice except mine) which would stick well at road temperatures above 30C. At road temperatures down around 15C (they rarely get colder here) I'd have to lower the pressures a fair bit and bring them to a low-ish working pressure through heating to get them to offer reasonable grip. The low-ish working pressure is required to keep them at temp even if it made the bike is mushy to start and a bit squirmy at temperature - squirmy doesn't bother me too much coming off more dirt orientated bikes. The lower pressures also increase the size of the tyres footprint. Mostly, when the road starts to get cold and greasy the priority is staying upright and not so much tack sharp handling/feel.

For those keen to find out what is best for them, it is easy enough to set up with a couple of thermometers (one IR for tyre and road temperatures) and an accurate pressure gauge to find out what works and what doesn't over a range of road conditions.

I havent checked my pressures in over 3 months, best get to it...