The best commuter bike is often the bike you already have. Maybe its an old mountain bike with flat tires sitting in the back of the garage. Or, it might be a road bike that gets more use around town than it does on the race course.Im a big fan of commuter bikes that arent too fancy because theyre usually locked up in a high-theft urban area so you dont want to attract too much attention (or, be too sad if it gets stolen). That said, you do want a bike thats functional. In this article, I share 7 upgrades you can make to any old bike to make it an excellent commuter.#1: Add some new tiresThe best bang for your bike is generally a new pair of tires. The best commuter tires are sturdier than regular road-bike tires and slicker than mountain bike tires. They should be able to roll fast on pavement and handle a little dirt or gravel in case you want to incorporate a rail-trail or canal path to your commute.Before buying, make sure to know what diameter your wheels are (26, 700cc, etc) and buy tires that match that wheel size. If youre not sure, most wheels will have the diameter listed on the rim, or your current tires might have the size listed (i.e. 262.0, 700cx35). The first number refers to the wheel diameter and the second number refers to the width of the tire.#2: Mount lights front and rear.Whether or not you plan on riding in the dark, you should add some commuter lights to your bike. Eventually, the day will come where you end up staying later at work than intended or youll spend more time than you planned at happy hour. Even if you are riding around sunrise or sunset, lights can help in low-light conditions. You want both a bright, front headlight and a bright, flashing rear light.The best commuter lights are BRIGHT, affordable, and have long battery life. Read: 7 Best Bike Lights To Keep You Safe In The Dark#3: Screw on some fenders.If you live somewhere with rainy (or snowy) conditions, fenders are a must. Also known as mudguards, they will help keep you from getting wet and muddy on your commute and make things much more enjoyable.If your bike has eyelets on the frame, you can install sturdy, traditional-style full fenders. These will provide the most protection and coverage but are a little heavier and more expensive. For bikes without eyelets, you can use clip-on fenders. These wont keep you quite as clean and dry but are better than nothing. Theyre also cheap, lightweight, and can be added in a jiffy.#4: Throw on a rear rack and panniers.Most newbie commuters wear a backpack, which is fine. But when your shoulders start to ache, youre sick of having a sweaty back, or you want to carry bigger, heavier loads, switch to a rear rack and panniers (or trunk bag) instead. Good panniers are waterproof and can carry everything you might need for your work day: a laptop, spare clothes, and even a gallon of milk on the way home.Again, the type of rack you can install is largely dependent on whether or not your bicycle frame has eyelets. If it does, you can buy a traditional frame-mounted rack and install it to the eyelets. If not, youll need a rack that clamps onto your seatpost.#5: Replace Brake Pads And Chain (If Needed)If your bike has been sitting in the garage for a while, make sure to check both the drivetrain and brakes. (If you dont know how to do that, take it to the shop or watch some YouTube videos). Often, some new brake pads and a new chain can give an old bike a major upgrade. Riding long distances to work and thru traffic will be both safer and more enjoyable if your bike is in good working order.#6: Have more fun with a bell.A bell not only looks cute and provides a little fun, its also super helpful if you are riding in congested areas such as on bike paths. Ring your bell to let pedestrians and slower riders know that you want to pass on the left.#7: Upgrade your saddle.If your saddle (bike seat) isnt comfortable, this should be one of the first things to be replaced. Youd be amazed how much more enjoyable your work commute is if you saddle fits YOU. Either head to a good shop that can let you test some out, or pick one off our list of our favorite womens saddles.More Articles To Help With Your CommuteThe Ultimate Guide to Bike Commuting (for Women)The Best Commuter Bikes for WomenAbout The AuthorKristen Bonkoski is a USA cycling and NICA coach, bike educator, and founder of Femme Cyclist.Shes also the host of the Femme Cyclist podcast and runsRascal Rides, a website about biking with kids.Shes been riding bikes for more than two decades and is passionate about empowering women on the bike.IG:@femme_cyclistJoin Kristens Weekly Newsletter!The post 7 Upgrades to Convert Any Bicycle To A Commuter Bike appeared first on Femme Cyclist.