Audience/one

At dealer. No, bought bike second hand. New in mtb'ing. deore lx front and deore xt back der. Sometimes the gears just tend to jump without me pushing any levers. specially when im pushing hard. happens like 3 or 4 times in 3hr ride.. The geras still work great, just now and again has a mind of their own..

My mtb's gears keep on slipping and changing at times.. There's no 'teeth' missing on rear cok that I can see of. I did put on a new chain recently and had bike serviced, also recently. Any ideas on what's wrong??

Guilty as charged! I threw my sachets on the road @ telkom sat-race. Figured the watering points were already so messy why not just drop sachets there? Won't do it again though(moet die voeltjies red). SO i guess i'm apologising for the pigs. Maybe that's why they gave away bacon at the end of the race??

Road frame's 56cm..

I'm switching from road to mtb! I'm 1.91 cm tall, what size mtb should i be looking at? 21"/22"?