Just bought my first mountain bike the other day. Can the more experienced folk here advise me on what a minimal toolkit contains? I'm not planning on racing or anything extreme, just some pleasant rides through forest trails. I've already got a couple of allen keys, spare tube, tube repair kit, and a couple of tire levers. Is it likely that'd I'd need something like a chain tool, or spoke tool, or are they the sort of items you'd only carry when on long treks? Basically this is all quite new to me, although i have been commuting on a road bike cross for about 18 months.