There isn't one longest fender as you can DIY fenders with pretty much anything flexible enough

-a recycled old tire
-plastic water bottles
-a copper sheet
-pvc tubes
-rain gutters
-license plates
-old inner tubes
-a rule
-an aluminum flat bar
-etc

https://www.guttersupply.com/m-contem...-gutters.gstml
https://www.instructables.com/id/Recy...-fender/#step1
https://www.instructables.com/id/Copper-Bike-Fender/
https://www.instructables.com/id/PVC-...ars/step5/End/
https://www.instructables.com/id/Lice...e-Bike-Fender/
https://www.instructables.com/id/Easy...d-inner-tubes/
https://www.instructables.com/id/Bike...and-clothes-h/
https://www.instructables.com/id/DIY-Bike-Fenders/

Those are sweet looking with the pinstripe. Do you have a pic from the side? I'm curious how well the fender line follows the radius of the wheel. Is there a big gap? I'm thinking that this is the best option for me.

Thanks! I'll take another pic tomorrow when it's daylight, the one I took today from the side was so blurry as to be useless. :/

If your front wheel/tire is throwing water up or forward you will ride into it.

Exactly.

Sorry for the delay, I work nights and slept through the daylight yesterday. :\

Note that the front fender is a little too long and I have yet to get around to dismounting it and trimming the back and mounting a mudflap, so it has caught a couple of times mounting curbs and actually bowed near the Airzoundz vessel and consequently got a little closer to the tire at the bottom. I was able to largely bend it back in place, but originally it followed the curve of the tire a little better. I expect I'll be able to get better leverage on it when I finally get around to dismounting it and I should be able to get it near perfect again.




Since you are considering buying a set of these I assume you are curious about how the fenderline follows the tire at the rear as well, so here's an overall pic and a close-up of the rear wheel.



Towards the rear of the rear fender it strays away from the line of the tire just a little bit. This is really the only place where I can tell that these fenders were originally designed for 650b. Nonetheless, it still stays pretty close to the tire. I don't seem to get any water coming around it and my girlfriend riding behind me hasn't said anything about spray escaping around it. I could actually center the fender around the tire a little better, but I wanted it pretty close to the front of the rear tire where spray could potentially get around it and on my legs. Most of the time I don't notice it because it still looks good. If you didn't know, and weren't looking for it, you probably wouldn't notice it at all. From most angles it looks natural and centered.



Let me know if you need a super close up of the gap between the tire and the fender on either of these.

I'll have to dig up my Velo Orange copies of these and see if they are close to as long. I don't think the front fender of the VO hammered fenders are nearly as long, but I recall them being quite long enough, and I like them long! I dismounted the VO ones to put on my touring rig and got the Honjo's for my commuter because the Honjo's have two slots running along them that lend themselves to pinstriping.

Also, IIRC I ordered a longer L shaped bracket from Velo Orange to lower the front fender down to closer to the tire. I also cut down a cork to use as a spacer down at the front of the rear fender to push it closer to the tire.

This one:
https://store.velo-orange.com/index.p...l-bracket.html
Although it says it's a Honjo bracket, IIRC my fender came with a different one.

I also recommend VO's leather fender washers. These can help eliminate the rattle you sometimes get with metal fenders. I've tried rubber ones and they mostly get shredded sandwiched as they are between two metal bits.

Holy long quill, Batman! You must be all legs with tiny Tyrannosaurus arms.

Thank you so much for the pics! They tell me exactly what I wanted to know.

What size are those tires? I think that my narrowest are 42s, my studs are 47s, and I have a set of Conti Top contacts that are 50s. It slooks like I will have plenty of "vertical" clearance. Do you think that any of these widths will cause problems?

Back in the mid seventies it wasn't uncommon to see dirt bikes with (what can be best described) as a "leading" mud flap on the front of the fender. It was usually stiff enough to retain it's shape, without drooping down onto the tire.

(A) I ride pretty upright, I'm much more comfortable that way.
(B) Basically 26 x 1.5". The rear is a Schwalbe Marathon in that size, the front is a Panaracer T-Serv that is technically a 1.75", but they run small, so it is really closer to about 1.6"
(C) No idea, I ride 26" tires, never liked road bikes and I'm tough enough on wheels as it is.

I'm on 26" tires, too. I was just a little concerned about running a 50mm tire under a 45mm fender. I should have vertical clearance to compensate for the lack of clearance inside the fender, due to the size difference between the 26" tire and 650b fender.

Sorry, I assumed because you were speaking of them in terms of millimeters instead of inches that you were considering putting them on something with road bike sized tires. 50mm might be too big, it'll probably be close. I should have a 26 x 2" Continental Town & Country kicking around here somewhere, I can mount that on a spare rear wheel and mount it on the bike and take some pictures if that'd help.