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How to mount a fender if the fork crown is not drilled

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How to mount a fender if the fork crown is not drilled

Old 11-06-09, 04:33 PM
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gospastic
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How to mount a fender if the fork crown is not drilled

Hi there,

I just got a new bike, and would like to put permanant fenders on it. I don't think mounting the rear will be a problem, but I am lost at how to go about mounting the front fender. The fork is carbon, and is not drilled. I've done some searching and it seems most fenders for sale require a hole at the crown to mount properly. Any advice on how to go about this is appreciated. Thanks.
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Old 11-06-09, 04:51 PM
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waynesworld
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Maybe try these:

http://ecom1.planetbike.com/7017.html

I've never used them, but I'll bet someone on here has.
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Old 11-06-09, 04:54 PM
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http://www.renehersestore.com/servle...are/Categories

Any of the hardware listed there give you any ideas?
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Old 11-06-09, 04:59 PM
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Great product, and an interesting name.

http://rivercitybicycles.com/product...ackets-737.htm
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Old 11-06-09, 05:12 PM
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My fenders that I ordered with my Xtracycle came with a funny plastic piece, that allowed me to attach my front fender with zip ties. The fenders were/are Planet Bike, I am not sure of the model name.
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Old 11-06-09, 05:29 PM
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How is the front brake mounted?
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Old 11-06-09, 08:25 PM
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Originally Posted by Steve530 View Post
How is the front brake mounted?
the bike has disc brakes.
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Old 11-06-09, 10:05 PM
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You could make an "expanding plug" type of mount for the hole in the bottom of fork (under the steerer tube) Drill through the the center of a black rubber plug (like the ones from High school chemestry- they are available at Home Depot) that is slightly loose in the hole. Use a nut and bolt with a pair of washers to "sandwich" the plug. When you tighten the bolt; the washers squeeze the plug "fatter"so it wedges in the hole. If you drill a hole in the fender and the feed the bolt up through the fender, and then into the "rubberplug sandwich" it can be secured inthe steerer tube hole. You might have to cut a "key" or metal "barb" in the washer nearest the nut, to limit the nut from turning while you tighten it. Look an old Velox Handle bar plug or an automotive "replacement Freeze plug" if itis not clear what I am talking about. Or Pm me and Ill send a drawing via email.
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Old 11-07-09, 01:49 AM
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thanks elcraft, that makes sense. i will try that.
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Old 11-07-09, 09:10 AM
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The expandable plug version of a fork crown daruma is likely the best bet. On a carbon fork, you'll want to avoid anything like clips and zip ties. For a non-homebrew solution, a couple companies make an expandable wedge star-fangled nut/stem cap replacement which might work.

The concern with an expandable plug on a carbon fork is that you're setting it below the level of the steerer tube (if the fork even has a metal steerer section), and placing forces on it which it was never designed for. I'm not one of those "OMG ur carbon forkz r gonna brake and killz u!" guys, either. Just saying that if you go with the expando-plug daruma bolt, don't overtighten it.
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Old 11-07-09, 11:41 PM
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Originally Posted by elcraft View Post
You could make an "expanding plug" type of mount for the hole in the bottom of fork (under the steerer tube) Drill through the the center of a black rubber plug (like the ones from High school chemestry- they are available at Home Depot) that is slightly loose in the hole. Use a nut and bolt with a pair of washers to "sandwich" the plug. When you tighten the bolt; the washers squeeze the plug "fatter"so it wedges in the hole. If you drill a hole in the fender and the feed the bolt up through the fender, and then into the "rubberplug sandwich" it can be secured inthe steerer tube hole. You might have to cut a "key" or metal "barb" in the washer nearest the nut, to limit the nut from turning while you tighten it. Look an old Velox Handle bar plug or an automotive "replacement Freeze plug" if itis not clear what I am talking about. Or Pm me and Ill send a drawing via email.
That would work good, I like it.
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Old 11-07-09, 11:55 PM
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step 1 :turn bike upside down
step 2: remove front wheel
step 3: drink bottle of wine, insert cork into bottom of steerer tube
step 4: drill flat head screwdriver through fender into cork

Tada.
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Old 11-08-09, 12:02 AM
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Just get the Planet Bike fenders in the first link. They work well with the disk brakes too.

I have sets on two bikes that have been great.
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Old 11-08-09, 10:13 AM
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I thought most carbon forks don't have a hole at the bottom of the steerer
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Old 11-08-09, 03:30 PM
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there is a hole at the bottom of the steerer, but it's really small, like 1/4 in diameter. is this big enough to work with?
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Old 11-08-09, 04:32 PM
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1/4" is plenty, but that does mean you'll have to figure out your own solution
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Old 11-08-09, 10:19 PM
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Originally Posted by gospastic View Post
there is a hole at the bottom of the steerer, but it's really small, like 1/4 in diameter. is this big enough to work with?
Then just use two plastic tie wraps to hold the fender to the hole.
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