The frame, fork, headset and brakes (which still perform superbly) are the original stock items. I still have the stock wheelset which still work fine but I thought I'd treat myself to a modest upgrade. I stripped off and replaced the stock stem, bars, crank and saddle, I ditched the F & R derailleurs as I did not get along with the stock grip-shifters too well and decided on a bone-simple single-speed setup and settled on a \"magic gear\" set up (38x22) as my few attempts at employing a...