Originally Posted by Sixty Fiver

For me... -52 F.

YMMV

For folks who are unaccustomed to snow, ice, and cold, winter cycling can be really difficult when you don't have the right gear or a bicycle that just is not equipped.

The studded tyres went on to my bikes in November and I have several bicycles set up for winter cycling... synthetic grease in the hubs, freewheel / freehub, and bottom bracket keep things running at extreme cold and in the case of my three speed, synthetic oil in the hub will keep it spinning smoothly at any temperature I could conceivably ride in.

Braking is also affected and you have to watch for ice build up on brake pads / rims... take a warm bike into a deep freeze and moisture will condense / freeze on the rims... my winter bikes rarely get warmed up and stay cold all winter.