Home made rear fender...

That about sums it up RD. Thanks.

Jeez now I'll be checking out the tail end on airplanes!!!

Quote from DKF Texas

Jeez now I'll be checking out the tail end on airplanes!!!

How do you all think I feel now? I can't go grocery shopping now without checking out the produce isles

FITS you are always checking out buns -Toasties
hairy

Hi all,
I too, want to make my own rear fender. My tire is a 305-30r-20, so finding the fender width for it, has been daunting. Chopper rear fenders aren't wide enough, and are curved on top. The only other choices are trailer fenders, but still aren't wide enough. Custom fenders are too expensive to play with, especially if you make a wrong cut. I have been playing with cardboard cutouts to see which lines look better. Does anyone have an idea they would share?

I bought a trailer fender for the outside edges and cut them off and welded a section into the center to widen it to the width i needed. Then made some brackets. So far it works great

@gooseman has a good idea there. You might consider using two trailer fenders to met your width needs and either weld the two together or simply rivet them together. The overlap might not look too bad if you can align the seam with the center of the tire.

Only problem I found with cutting 2 fenders to get the width is the trailer fenders are not flat across the centre but have an arch. At least what I found locally. That's why I just cut the edges off to use and added the centre pc to make up the width

@gooseman, I suppose with the wx you haven't had a chance to road test it yet. I found, when I made my motorcycle trailer and used flat stock for the braces I got a lot of vibration. Welded a piece of flat stock perpendicular to the flat of the brace to give me a T. This helped a lot with vibration.

Flat stock cracked after a few weeks so I remade the mounts out of angle iron and so far so good. I made this fender a while back

I really like it, have been trying to come up with the parts to make one myself. How did you bend the sheet metal for the top? Don't have access to a machine that can bend sheet stock.

I put it through a roller untill it matched the contour of the original fender.

You might try taking a sheet or two of plywood and using a wide kerf saw blade cut the form you want (possibly a little tighter than the curve you actually want). Use some spacer material to hold the plywood forms or use multiple layers of plywood to form the entire curve out of pieces of plywood glued or screwed together and force the pieces together using some pipe clamps.
Or, check with a local sheet metal or body shop about having them do the bend for you.
Here's an interesting YouTube on bending sheet metal w/o dedicated tools -

This video shows a technique similar to what I described, just on a narrower piece of metal. It also addresse bending tubing -

YouTube can be a great source of inforamtion!

This is exactly what I love about this forum. Everyone chiming in with awesome ideas and experience. I guess a trailer fender is in the budget... didn't want to, but alas..., I have to. Thanks Gooseman. Cheers!

Princess auto. I also found a place in California that makes them as wide as you want but more pricer than i wanted to spend with costs and shipping. I know a fellow in Michigan that was buying them and making brackets and reselling them from the place in cali. No welding required so less work

I had done this fender before I got the Corbin bags.
https://slingshotinfo.com/index.php?attachment/4670-007-jpg/

Northerntool.com has fenders easily workable.

I liked this fender at NT - Tow Zone Single Round Steel Fender Fits Single 8in. Tires, 16 1/4in.L x 7in.W x 3 5/8in.H | Single Steel Trailer Fenders| Northern Tool + Equipment. It's designed for an 8" tire, but it looks like 4 of them could maybe be joined to handle up to around a 345 tire. Might need a little reshaping to fit.

I had originally hoped I could find a heavy duty (for thicker sides) ABS or other plastic round trash can of a large enough diameter to allow me to cut a wide piece to fab a fender, but I haven't been able to find anything that isn't tapered.

Tractor Supply also offers a variety of fenders including some Polyethylene plastic fenders which might be adapted for the Slingshot rear.
Search Results for polyethylene fender at Tractor Supply Co.. Several of these look like they might be modded to fit.

I searched YouTube for some videos on forming ABS and plastic sheet and came across this video showing some folks making the Bobmadier's window for a Lancaster Bomb Aimer's Bubble -

This is basically an ad, but shows some simple heat forming -

Makes me wish I had an oven large enough to handle some large sheets to try making a fender. I've seen people heat form plastic sheet using a handheld heat gun, but I'd think a wide fender would need an oven for proper heating.

Quote from Nemesis1701

Northerntool.com has fenders easily workable.

The one I had on there was a Northern Tool fender that I cut down..Only cost 29 bucks.