Travis wrote:

The bike is a somewhat heavy one and I weigh about 105kg.

Today my brand new rear tyre and/or tube burst.
This tyre is a 1.25" x 26" thin (ish) mountain bike tyre.

First of all, is it more likely to be the tyre or the tube which is
responsible for a popping tyre?

Tyre doesn't match rim or you didn't align it evenly.
FWIW, i found thornproof tyres a complete waste of money. They all
eventually split along the rim. heavy loads and a very stiff tyre. OTOH,
thornproof tubes are fantastic.


100psi is the "Max PSI" according to Torpedo7. Should I inflate it
less than that? How much less?

If the tyre popped off, then it is a mismatch of tyre to rim. you need
to try different tyres and/or rims(worst case).

No recommendations as to brand as all I ever used were yumcha .