So i got a sattori aberhallo stem extender to fix the handlepost issue being too short for my fit, it works quite well, now i can ride off the saddle..The birdy sport stem is really hard to get and quite expensive for my budget tho..

another issue i have now is the chain keeps falling off on me, the first was when i hit a bump at the 8th gear, and another when i was changing gears from 8th to 7th on a bumpy road.. went to a local bike shop and they recommend me to get a new double chain crank set.. a shimano 105 or the more expensive ultegra

what do you guys think?