1 Spare Tube and Patch Kit:
The most common problem cyclists face is a flat tire. Always carry a spare tube and/or a patch kit with you. If your flat tire is caused by a small puncture, you’ll likely be able to use a patch kit to fix it. For large punctures and blowouts, replacing the tube is your best option.
2 Tire Levers:
Tire levers help you pry your tire off the rim of your wheel when you’re fixing a flat. They’re especially helpful when you’re removing a road tire, as opposed to a mountain bike tire, because road tires typically fit very tightly on the rim.
3 Bike Pump:
If you get a flat tire while you’re out on the road, you’ll need a way to inflate the tire after patching or replacing your tube. Always carry a small hand pump or CO2 inflator that will fit in your backpack or mount to your bike frame.
4 Multi-tool:
A multi-tool can handle a surprisingly wide variety of repairs and its versatility makes it a good value. Its small size means it fits easily in an on-bike saddle pack or a backpack.
A good multi-tool has the following:
-A variety of Allen wrenches.
-An adjustable wrench, or open or hex wrenches (8, 10, 15mm are the most common, but size requirements vary depending on the bike).
-A chain tool.
-A Phillips screwdriver.
-A flathead screwdriver.