I brought my hybrid bike to Evans Cycles recently to get the rear gear mech replaced after I broke it.
When I got the bike back, it was significantly harder to pedal. I tried moving my gears lower but even then the amount of effort required to maintain the bikes speed is higher than before, considerably, which is making my commute exhausting which it never was before.
I notice that it is harder to change the gears now on my bike - twisting the handle feels harder and the gears move very snappy. Could it be they have over tightened something? What do you think it could be?