Let's offroad / mountain bike / mtb / ride dirt

i used to run a dingle speed with an off-road and road gear.

Meaning a flip over wheel with a cog on both sides? Haven't got the right kind of hub for that. I've also only got a granny ring with middle bash guard up front so no room for an alternative ring. That was mostly done because I kept catching my rings trying to hop up or over stuff. Not too bad when it's just a log but a big boulder can do nasty things to your teeth :(.

i would fit slicks for the commuting though.
That's my other problem, I've got almost slick tyres on which doesn't help off-road. Again, I can't really be arsed to switch tyres every weekend.