> single speed frame
> rigid fork
> decent sealed bearing headset
> stock of brake pads
> cheap UN52 square taper BB and appropriate cranks*
> £5 SS cog, £5 SS chain, £10 SS chainring*
> mud tyres
> warm tights
> pedal towards hills, go round in circles in hills till knackered, pedal home
MTBSAD fixed!
you’ll be fitter than your mates hiding indoors, you’ll get to feel all smug, your bike will keep working no matter what, you’ll discover new trails, and new challenges on old trails, and the spring/summer will be all the sweeter when it does arrive!
*posher options are available if you prefer, but they won’t necessarily work any better or longer 😉