I'm a new cycling I have a 09 raleigh grand sport. I'm planning on riding 100 miles with some friends in September and since buying a new bike is out of the question I wanted to know of some upgrades I can do that aren't TOO expensive as I only paid $750 for the bike. I know new to cycling and 100 miles don't go together but I'm not terribly out of shape. My fifth ride on this bike was a metric century. Here are the specs on my bike, if anyone can steer me in the right direction I would appriciate it greatly!
Frame
Aluminum
Fork
Carbon
Crankset
FSA Omega Compact, 50/34
Bottom bracket
FSA Mega Exo External bearing
Shifters
Shimano 2200 STI
Front derailleur
Shimano 2200
Rear derailleur
Shimano Sora
Rear cogs
Shimano HG50, 12-25, 8-speed
Number of gears
16
Brakes
Tektro Dual Pivot
Brake levers
Shimano 2200 STI
Rims
Freedom RLX 1.9 Double Wall
Front hub
Joytech Alloy QR, 32h
Rear hub
Joytech Alloy QR, 32h
Tires
Vittoria Zaffiro, 700x25
Handlebar
Alloy Road
Stem
Alloy 3D
Seat post
Alloy microadjustable
Saddle
Avenir 200 Series
Pedals
Road Pedals
Headset
FSA Integrated
Chain
KMC Z82
Frame
Aluminum
Fork
Carbon
Crankset
FSA Omega Compact, 50/34
Bottom bracket
FSA Mega Exo External bearing
Shifters
Shimano 2200 STI
Front derailleur
Shimano 2200
Rear derailleur
Shimano Sora
Rear cogs
Shimano HG50, 12-25, 8-speed
Number of gears
16
Brakes
Tektro Dual Pivot
Brake levers
Shimano 2200 STI
Rims
Freedom RLX 1.9 Double Wall
Front hub
Joytech Alloy QR, 32h
Rear hub
Joytech Alloy QR, 32h
Tires
Vittoria Zaffiro, 700x25
Handlebar
Alloy Road
Stem
Alloy 3D
Seat post
Alloy microadjustable
Saddle
Avenir 200 Series
Pedals
Road Pedals
Headset
FSA Integrated
Chain
KMC Z82