Disc brakes and fenders
#1
Thread Starter
Did I catch a niner?
Joined: Dec 2010
Posts: 542
Likes: 1
From: a van down by the river
Bikes: Vassago Fisticuff/Surly Ogre/Surly Pugsley/Surly Pugsley 29+
Disc brakes and fenders
This is becoming a problem on my Vassago Fisticuff I have noticed. I currently have a set of SKS Commuter Hybrids (45mm) and I can get everything mounted but requires some bending and also mounting to the brake mount which I would rather avoid.
I should also mention I am having an issue with the fender pushing up tight against the front derailleur. I am considering going to a smaller fender if some decent suggestions are listed. I can still return these and would prefer it that way vs buying another set outright.
What adapters have you used and had success?
I should also mention I am having an issue with the fender pushing up tight against the front derailleur. I am considering going to a smaller fender if some decent suggestions are listed. I can still return these and would prefer it that way vs buying another set outright.
What adapters have you used and had success?
Last edited by Mr Pink57; 12-29-10 at 07:32 AM.
#2
all-weather commuter
Joined: Mar 2009
Posts: 315
Likes: 0
From: Rochester, NY
I got a thin piece of metal about half an inch wide and 3 inches long and drilled a hole into each end. I then bent it into an S and screwed one end to the fender/rack mount hole on the frame and attached the fender to the other end. Now I can adjust how far the fender stay end is away from the fork to make it clear the brake caliper.
Let me know if that is not clear enough and I will take a picture.
Let me know if that is not clear enough and I will take a picture.
#6
Senior Member

Joined: Feb 2001
Posts: 12,948
Likes: 9
From: England
The issue with disc brakes is interference witht the fender stay: there is no straight-line route. My LBS bent the stays to route under the front caliper. You can cut, drill and form some metal to make a bracket to relocate a fender eyelet.
If your fenders are too wide for your front mech and casuing interference, you can remove some of the fender material. I use a dremel tool to chip away until the shape is correct (usually to produce a thin neck between the chainstays)
If your fenders are too wide for your front mech and casuing interference, you can remove some of the fender material. I use a dremel tool to chip away until the shape is correct (usually to produce a thin neck between the chainstays)
#7
I had no problems mounting my fenders on my Salsa. The PB fenders came with spacers to use on the caliper side of the fender stays. No need for bending, twisting, cursing. Does your frame and fork come equipped with eyelets for fenders or are you jury-rigging it?
#9
Older than dirt
Joined: May 2008
Posts: 5,342
Likes: 3
From: Winchester, VA
Bikes: Too darn many.. latest count is 11
Fenders can be fun to fit on discs.
One trick I've used is to use an extra long bolt on one of the caliper mounts. You run two nuts onto the bolt, then screw the bolt into the caliper mount fully engaged. You run the first nut town to the caliper mount to tighten and the second one outboard for the fender stay mount.
Don't have one here at the moment to take pictures of, but the description works.
Rear if you have to run a disc specific rack you can sometimes go with a bit longer bolt and use the same mount as the rack - either outboard or inboard of the rack mount.
All that said though, I don't find fenders to be the be-all end-all anymore and don't run them. If it's raining you're going to get wet anyway. A rear rack will usually stop the stripe up the back syndrome. Have two new sets of SKS's on the shop wall should I change my mind
Commo Soulja, like that Salsa. Building a Vaya now.
One trick I've used is to use an extra long bolt on one of the caliper mounts. You run two nuts onto the bolt, then screw the bolt into the caliper mount fully engaged. You run the first nut town to the caliper mount to tighten and the second one outboard for the fender stay mount.
Don't have one here at the moment to take pictures of, but the description works.
Rear if you have to run a disc specific rack you can sometimes go with a bit longer bolt and use the same mount as the rack - either outboard or inboard of the rack mount.
All that said though, I don't find fenders to be the be-all end-all anymore and don't run them. If it's raining you're going to get wet anyway. A rear rack will usually stop the stripe up the back syndrome. Have two new sets of SKS's on the shop wall should I change my mind

Commo Soulja, like that Salsa. Building a Vaya now.
Last edited by CCrew; 12-29-10 at 12:21 PM.
#10
Make a "standoff" to clear the caliper. 
I used a longer stainless M5 bolt with a stack of nuts and washers in order to push the stay out past the disc caliper. With that particular bike, given the positioning of the braze-on, the stay ended up being too short to reach the fender. I cut a piece of another stay, bent it, and then used silver wire to wrap the stays and bent piece together.

I assume that Seattle Forrest's comment is facetious.
I used a longer stainless M5 bolt with a stack of nuts and washers in order to push the stay out past the disc caliper. With that particular bike, given the positioning of the braze-on, the stay ended up being too short to reach the fender. I cut a piece of another stay, bent it, and then used silver wire to wrap the stays and bent piece together.
I assume that Seattle Forrest's comment is facetious.
#12
#13
Born Again Pagan
Joined: Aug 2009
Posts: 2,241
Likes: 2
From: Southwestern Ontario
Bikes: Schwinn hybrid, Raleigh MTB

For my rear fender I used the supplied spacer supplied with my PB Cascadias to clear the caliper (why all manufacturers don't mount calipers on the chain stays to avoid this problem is beyond me):

My bike lacked eyelets on the front dropouts, so I bent and trimmed the struts to allow them to be mounted on the lowrider braze-ons:
#14
If the fender is interfering with f. derailleur, just cut away 5mm of fender edge to give clearance. SKS rears were actually made this way for a long time.
As far as fender stay interference with disc brake, simplest thing to do is bend them around to give clearance. Not the prettiest solution, but, you'll hardly notice after a while.
Mounting fenders well can be a real challenge that may require a little resourcefulness and creativity.
As far as fender stay interference with disc brake, simplest thing to do is bend them around to give clearance. Not the prettiest solution, but, you'll hardly notice after a while.
Mounting fenders well can be a real challenge that may require a little resourcefulness and creativity.
#15
I went from having a bike that fit me perfectly, to a bike I could only turn if the crank arms were at 6 and 12 o'clock. Fenders were the only "upgrade" I think I've ever made to a bike that left me disappointed. My comment was serious; it's the fenders that are of feces.
#16
Infamous Member
Joined: Sep 2005
Posts: 24,360
Likes: 7
From: Ohio
Bikes: Surly Big Dummy, Fuji World, 80ish Bianchi
incorrect
__________________
"Let us hope our weapons are never needed --but do not forget what the common people knew when they demanded the Bill of Rights: An armed citizenry is the first defense, the best defense, and the final defense against tyranny. If guns are outlawed, only the government will have guns. Only the police, the secret police, the military, the hired servants of our rulers. Only the government -- and a few outlaws. I intend to be among the outlaws" - Edward Abbey
"Let us hope our weapons are never needed --but do not forget what the common people knew when they demanded the Bill of Rights: An armed citizenry is the first defense, the best defense, and the final defense against tyranny. If guns are outlawed, only the government will have guns. Only the police, the secret police, the military, the hired servants of our rulers. Only the government -- and a few outlaws. I intend to be among the outlaws" - Edward Abbey
#17
Infamous Member
Joined: Sep 2005
Posts: 24,360
Likes: 7
From: Ohio
Bikes: Surly Big Dummy, Fuji World, 80ish Bianchi
I went from having a bike that fit me perfectly, to a bike I could only turn if the crank arms were at 6 and 12 o'clock. Fenders were the only "upgrade" I think I've ever made to a bike that left me disappointed. My comment was serious; it's the fenders that are of feces. 

__________________
"Let us hope our weapons are never needed --but do not forget what the common people knew when they demanded the Bill of Rights: An armed citizenry is the first defense, the best defense, and the final defense against tyranny. If guns are outlawed, only the government will have guns. Only the police, the secret police, the military, the hired servants of our rulers. Only the government -- and a few outlaws. I intend to be among the outlaws" - Edward Abbey
"Let us hope our weapons are never needed --but do not forget what the common people knew when they demanded the Bill of Rights: An armed citizenry is the first defense, the best defense, and the final defense against tyranny. If guns are outlawed, only the government will have guns. Only the police, the secret police, the military, the hired servants of our rulers. Only the government -- and a few outlaws. I intend to be among the outlaws" - Edward Abbey
#19

But there is no better system for keeping spray off the rider and bicycle, other than not riding in the rain.
#21
Anyway, a rear rack does most of the job of a rear fender. I'd rather have a clip on front fender than a normal one. And I find it's better to ride in water -proof or -tolerable pants ( merino or goretex, for example ) than with fenders.
#22
rebmeM roineS

Joined: Jan 2006
Posts: 16,231
Likes: 366
From: Metro Indy, IN
Bikes: Bacchetta Giro A20, RANS V-Rex, RANS Screamer
Planet Bike Speedez fenders can be used to avoid mounting right at the brake. I have one on the rear of my V3 recumbent and a conventional Hardcore fender on the front (with a bent fender stay and longer screws with nylon spacers).


__________________
Bacchetta Giro A20, RANS V-Rex, RANS Screamer
Bacchetta Giro A20, RANS V-Rex, RANS Screamer
Last edited by JanMM; 12-29-10 at 05:33 PM.
#23
Older than dirt
Joined: May 2008
Posts: 5,342
Likes: 3
From: Winchester, VA
Bikes: Too darn many.. latest count is 11
I don't think so. Seriously, you think you're going to ride in the rain and not get wet?
I've run fenders. Get any speed and the water coming off the front wheel is still going to blow forward off the top of the wheel then back in your face. Rear with the right rack (I use Topeak MTX which are essentially closed at the top) isn't going to throw the water up your back, and beyond that the rest is rain - you're still going to get wet. Sure, I'll give you that you may not get as dirty, but once you're wet you can only get so wet..
I've run fenders. Get any speed and the water coming off the front wheel is still going to blow forward off the top of the wheel then back in your face. Rear with the right rack (I use Topeak MTX which are essentially closed at the top) isn't going to throw the water up your back, and beyond that the rest is rain - you're still going to get wet. Sure, I'll give you that you may not get as dirty, but once you're wet you can only get so wet..
#24
Infamous Member
Joined: Sep 2005
Posts: 24,360
Likes: 7
From: Ohio
Bikes: Surly Big Dummy, Fuji World, 80ish Bianchi
__________________
"Let us hope our weapons are never needed --but do not forget what the common people knew when they demanded the Bill of Rights: An armed citizenry is the first defense, the best defense, and the final defense against tyranny. If guns are outlawed, only the government will have guns. Only the police, the secret police, the military, the hired servants of our rulers. Only the government -- and a few outlaws. I intend to be among the outlaws" - Edward Abbey
"Let us hope our weapons are never needed --but do not forget what the common people knew when they demanded the Bill of Rights: An armed citizenry is the first defense, the best defense, and the final defense against tyranny. If guns are outlawed, only the government will have guns. Only the police, the secret police, the military, the hired servants of our rulers. Only the government -- and a few outlaws. I intend to be among the outlaws" - Edward Abbey
#25
Infamous Member
Joined: Sep 2005
Posts: 24,360
Likes: 7
From: Ohio
Bikes: Surly Big Dummy, Fuji World, 80ish Bianchi
Nothing to do with feet in the wheel: I was able to turn the bike wherever my feet happened to be in the pedal rotation, until I got fenders. Honestly, I prefer cornering with the crank arms at 3 and 9 o'clock than 6 and 12, because in a series of hair-pins, you don't have to keep changing. It's a habit I got into. And fenders get in the way.
Anyway, a rear rack does most of the job of a rear fender. I'd rather have a clip on front fender than a normal one. And I find it's better to ride in water -proof or -tolerable pants ( merino or goretex, for example ) than with fenders.
Anyway, a rear rack does most of the job of a rear fender. I'd rather have a clip on front fender than a normal one. And I find it's better to ride in water -proof or -tolerable pants ( merino or goretex, for example ) than with fenders.
__________________
"Let us hope our weapons are never needed --but do not forget what the common people knew when they demanded the Bill of Rights: An armed citizenry is the first defense, the best defense, and the final defense against tyranny. If guns are outlawed, only the government will have guns. Only the police, the secret police, the military, the hired servants of our rulers. Only the government -- and a few outlaws. I intend to be among the outlaws" - Edward Abbey
"Let us hope our weapons are never needed --but do not forget what the common people knew when they demanded the Bill of Rights: An armed citizenry is the first defense, the best defense, and the final defense against tyranny. If guns are outlawed, only the government will have guns. Only the police, the secret police, the military, the hired servants of our rulers. Only the government -- and a few outlaws. I intend to be among the outlaws" - Edward Abbey









