I always skipped road riding and used my mtb bike in the winter. Plus I would rather avoid the salt.
I used to break up my trainer rides with some winter night riding (sometimes up to three hours).
Coldest I did was around -30C (lasted about 1.5 hrs in that). Down to -20 I could last longer though.
I would ride a mountain bike (backup 26" mtb bike, not a fat bike) on packed trails with studded tires for ice. Used my ski helmet and goggles, massive gloves and winter riding boots. So maybe if you were interested in picking up an older mtb bike you could use that. Remember # of bikes = n+1 ;)
I used to break up my trainer rides with some winter night riding (sometimes up to three hours).
Coldest I did was around -30C (lasted about 1.5 hrs in that). Down to -20 I could last longer though.
I would ride a mountain bike (backup 26" mtb bike, not a fat bike) on packed trails with studded tires for ice. Used my ski helmet and goggles, massive gloves and winter riding boots. So maybe if you were interested in picking up an older mtb bike you could use that. Remember # of bikes = n+1 ;)