DIY Bike Fenders: How To Make Your Personal

When moist climate arrives, many people are reluctant to hold up our bikes. And why ought to we? There are various methods to remain heat and comfy on our bikes, regardless of the climate, and fenders are key for blocking splattered mud and water. Whether or not you need to save a couple of bucks or are simply searching for a enjoyable rainy-day mission (see what we did there?), these DIY entrance and rear fenders are the proper addition to any two-wheeled steed so you’ll be able to preserve rolling via the seasons.

For this DIY, you need to be snug dealing with a hacksaw, drill and some different small instruments. Supplies price round $15 to $20, and it took us just a few hours to finish as soon as we gathered what we wanted.

Observe that bikes differ considerably in specs and sizing. Bolt-on fenders require that your bike body has threaded fittings for set up. You will need to affirm this design will work on your body and tires, and make modifications the place mandatory to suit your particular bike.


  • Two 48 x 1.5 in. aluminum flat bars, obtainable at your native ironmongery store
  • Six 5mm stainless-steel Allen head bolts
  • Flat washers (quantity will rely in your bike body; we used 12)
  • 12-gauge galvanized utility wire, 10 ft.
  • 4 1/16th-in. cable clamps
  • One metal L angle bracket (dimension depends upon your fork; ours was 2 x 2 in.)
  • One 2-in. bolt (dimension depends upon the depth of your fork)


  • Marker
  • Hacksaw
  • Clamp
  • Flat file
  • Drill with 5/32nd and seven/32nd drill bits
  • Needle-nose pliers
  • Allen wrench
  • Screwdriver
  • Crescent wrench
  • Sandpaper (optionally available)

Half One: Put together the Fenders

1. Form the Fenders

Take away the rear wheel out of your bike after which take away the tire. You’ll use the wheel as a information to form every fender to the right curve. Wrap the aluminum bar across the rim.

measure bike fenders

After you have a common curve as a information, run the metallic forwards and backwards over a hard-edged and steady floor, like a secured 2 x four, to get the flat bar to carry the curve you need. Be sure you work out any spots which have an angle or an uneven curve. Repeat the method with the second fender. Put the tire again in your wheel.

Creating a curve in the fenders

2. Measure the Fenders to Match

 The rear fender ought to cowl about half the circumference of the wheel. The 48-in. aluminum flat bar was the proper size for our 700c tires, and we didn’t must take away any size for the right match.

Rear bike fender

The entrance fender ought to cowl a few quarter of the tire’s circumference. To measure, maintain the fender about an inch above the tire with the underside finish at three o’clock. Mark the highest of the fender at 12 o’clock. Clamp the aluminum securely to your work floor, then use a hacksaw to chop alongside the mark.

Front fender

three. Form the Ends of the Fenders

Should you’d wish to form the ends of the fenders, you should use a big washer or different related spherical object as a information. Mark the specified curves and reduce alongside the marks with a hacksaw. Then, use a flat file to easy all of the tough edges earlier than transferring on.

Shape end of fenders

Half Two: Connect the Rear Fender

1. Drill Chainstay Mounting Gap

In your rear fender, mark a centered spot roughly 1 to 2 inches from the underside of the fender. Observe: Your rear wheel continues to be eliminated.

Drill a gap with the 7/32ndbit. You may need to slot this gap lengthwise (drill two holes touching one another to kind an oval slot) to permit for some micro-adjustments.

Drill Chainstay Mounting Hole

2. Mount the Fender to the Chainstay Bracket

Mount the rear fender to the chainstay bracket with a 5mm bolt and one or two washers (we didn’t put one on the non-frame facet). The chainstay is the a part of the body closest to your chain.

Mount the Fender to the Chainstay Bracket

DIY Bike fenders

Observe: Relying in your chainstay width, you could have to chop the fender narrower to suit, or you’ll be able to add spacers between the body and the fender to permit for extra clearance (as pictured above).

three. Drill Seat Keep Mounting Gap

Along with your fender mounted on the chainstay, mark the placement of the higher mounting gap underneath the middle of the seat keep brace by making a line on both facet of the brace.

Take away the fender from the body and drill a gap with the 7/32nd bit centered between your marks.  (Once more, you may need to slot this gap lengthwise to permit for some micro-adjustments.)

Drill Seat Stay Mounting Hole

four. Mount the Fender to the Seat Keep Brace

Mount the rear fender at each the chainstay and seat stick with 5mm bolts and washers. Substitute your wheel and ensure the fender is centered over it.

Mount the Fender to the Seat Stay Brace

Half Three: Connect Wire Stays to the Rear Fender

1. Measure the Wire Keep

Measure out a size of utility wire that runs from the dropout on one facet, again to the tail finish of the fender and again round to the dropout on the opposite facet. Then, add just a few additional inches on all sides. (The additional size will probably be used to wrap across the dropout bolts to safe the fender on all sides).

Measure the wire stay

2. Form and Place the Wire Keep

Bend the wire so it’s within the form of a U across the fender.

Shape and Position the Wire Stay

Place the wire in order that the keep doesn’t contact any parts when ultimately secured to the dropout (as pictured). You’ll have to curve the wire a bit.

Mark a line on the fender the place you need to place the wire keep.

You’re going to mount two units of cable clamps; one on every fringe of the fender. Use one of many cable clamp mounts to mark the positions of the drill holes on both facet of the road you simply drew.

three. Mount the Wire Stick with the Cable Clamps

Take away the fender and drill holes on the marks with the 5/32nd bit.

Mount the wire on the drilled holes utilizing the cable clamps.

Mount the wire at the drilled holes using the cable clamps.

four. Connect the Wire Keep on the Dropouts

Maintain the wire keep as much as the dropout. It will likely be wrapped round a 5mm bolt via the dropout eyelet. Make three marks, every about 1 centimeter aside. These point out the place you’ll make every bend to wrap the wire across the bolt.

Attach the Wire Stay at the Dropouts

Make the bends with pliers in order that the wire will wrap securely across the bolt. Clip the surplus wire.

Utilizing washers and 5mm bolts, mount the wire keep to the dropout eyelets on either side.

Half 4: Connect the Entrance Fender

1. Drill Fork Crown Mounting Holes

Place the entrance of the L bracket 6 inches from the entrance finish of the fender (as proven). Mark and drill two L bracket mounting holes with the 7/32nd bit.

1. Drill Fork Crown Mounting Holes

Mount the L bracket to the fender with two 5mm bolts and washers.

Mount the L bracket and fender to the fork crown

Mount the L bracket and fender to the fork crown with the two″ bolt and washers. (Observe: There could also be a reflector or brakes already mounted right here; in that case you’ll be able to sandwich the L bracket behind them.)

2. Make Wire Keep for the Entrance Fender

Repeat the method of constructing and mounting a wire keep on your entrance fender. Measure the wire from one facet of the fork finish, again to about three o’clock (as pictured) in your fender, and round to the fork finish on the opposite facet. (Bear in mind so as to add just a few inches to accommodate for the wire wrapping across the eyelet bolt on all sides.)

Front fender

Half 5: End and Experience within the Rain

To offer your new fenders a brushed look, you’ll be able to go over the floor with some tough sandpaper (we used 120 grit). Then, pull in your rain gear, leap in your bike and revel in your splatter-free trip.

Go over surface with sandpaper

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DIY Bike Fenders: How To Make Your Personal

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