running a 2.25 up front and 2.1 on the rear. Weigh 16.5 stone geared up at the moment and run the rear at 45psi, 38ish psi on the front of a 100mm forked hardtail.
The front definitely digs in better on turns for me, while the 2.1 likes to slide out – its not too bad though*
*thetford conditions only (wet, frozen and dry)
I’d buy a front 2.25 that should last using the both 2.1 rears then try summit else and expand your personal tyre experience.