Full Mudguards for Disc braked Bike

General cycling advice ( NOT technical ! )
Snowflake
Posts: 143
Joined: 8 Sep 2011, 10:48pm

Full Mudguards for Disc braked Bike

Postby Snowflake » 6 Aug 2015, 5:35pm

Folks,

A friend of mine has just bought a Surly Straggler, and wants some full mudguards on it.

It has clearance through the stays and eyelets etc, 700c x 40 tyres, and the way I see it the traditional V type rear wire support won't clear the disks?

Anyone suggest any suitable guards?

Thanks in advance.

S
Last edited by Snowflake on 9 Aug 2015, 12:24pm, edited 1 time in total.

phil parker
Posts: 1019
Joined: 31 Dec 2009, 5:09pm
Location: Hants/Wilts

Re: Full Mudguards for Disk braked Bike

Postby phil parker » 6 Aug 2015, 6:02pm

It just requires a bit of manipulation to work. You can either bend the wire to suit or use two individual mudguard stays on each side. The last one I did we cut the mudguard stay close to where the bolt goes through for one single stay and with the remainder, heated up the end and formed another circular bolt hole to use on the shorter of the two stays. Each bike and set up can be different, but it just requires a bit of imagination and manipulation!

Good luck.

freeflow
Posts: 1415
Joined: 29 Aug 2011, 1:54pm

Re: Full Mudguards for Disk braked Bike

Postby freeflow » 6 Aug 2015, 6:14pm

Bend the stays to go around the calipers. To do it properly, you need to make sure the bends realigns the stay so that the bend is like a loop out of a straight line. If you don't do this then you will have the devil of a time trying to get the mudguard aligned.

AndyHenderson
Posts: 25
Joined: 15 Oct 2013, 11:40am

Re: Full Mudguards for Disk braked Bike

Postby AndyHenderson » 7 Aug 2015, 2:38pm

My solution was to create my own stand-off for the mudguard stay on the disk brake side. I threaded a long bolt through the mudguard mount from the inside out. This resulted in a screw thread sticking out past the disk brake. I then threaded several nuts onto the screw thread until the last nut was protruding beyond the disk brake. I then secured the mudguard with washers and another nut and adjusted the mudguard position to fit around the tyre.

Filing the bolt to length and wrapping with insulating tape finished the job.

Meant I could use standard mudguards with only a small amount of bending required.

Andy

niggle
Posts: 3423
Joined: 11 Mar 2009, 10:29pm
Location: Cornwall, near England

Re: Full Mudguards for Disk braked Bike

Postby niggle » 7 Aug 2015, 3:36pm

AndyHenderson wrote:My solution was to create my own stand-off for the mudguard stay on the disk brake side. I threaded a long bolt through the mudguard mount from the inside out. This resulted in a screw thread sticking out past the disk brake. I then threaded several nuts onto the screw thread until the last nut was protruding beyond the disk brake. I then secured the mudguard with washers and another nut and adjusted the mudguard position to fit around the tyre.

Filing the bolt to length and wrapping with insulating tape finished the job.

Meant I could use standard mudguards with only a small amount of bending required.

Andy

I did something similar front and rear to fit mudguards to my disc brake Kaffenback, but without so many nuts etc. However I used a long bolt with the head outboard, screwed in to the frame eyelet as per normal with a nylock nut tightened against the frame to lock it. I used another nylock nut facing the other way tightened against the inside of the mudguard stay. As you say much less bending required, which was a good thing as the Stronglight mudguards from Spa cycles that I fitted did not have all that much extra stay length to play with.

Brucey
Posts: 41420
Joined: 4 Jan 2012, 6:25pm

Re: Full Mudguards for Disk braked Bike

Postby Brucey » 7 Aug 2015, 4:09pm

it is often possible to make small bracket with two holes in it, that mounts to one of the caliper bolts. You can then mount the mudguard stays to the bracket in the normal way, with minimal extra bending of the stays required.

cheers
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Bicycler
Posts: 3400
Joined: 4 Dec 2013, 3:33pm

Re: Full Mudguards for Disk braked Bike

Postby Bicycler » 7 Aug 2015, 5:13pm


User avatar
foxyrider
Posts: 5173
Joined: 29 Aug 2011, 10:25am
Location: Sheffield, South Yorkshire

Re: Full Mudguards for Disk braked Bike

Postby foxyrider » 7 Aug 2015, 6:08pm

If the bike was designed properly it wouldn't be an issue! Just fitted full guards to my Focus Mares without having to make any adaptions at all - Vorsprung durch technic! :D
Convention? what's that then?
Airnimal Chameleon touring, Orbit Pro hack, Orbit Photon audax, Focus Mares AX tour, Peugeot Carbon sportive, Owen Blower vintage race - all running Tulio's finest!

Brucey
Posts: 41420
Joined: 4 Jan 2012, 6:25pm

Re: Full Mudguards for Disk braked Bike

Postby Brucey » 7 Aug 2015, 6:35pm

BTW in brakes it is more usual to say 'brake disc' not 'brake disk'. Although the two spellings are theoretically interchangeable the later 'disc' variant has long been more popular in the UK than the older 'disk' variant.

In addition, through usage, the 'disk' spelling has become associated with magnetic computer media and drives (developed in the USA) whereas the 'disc' spelling is normally used for optical media (invented and named in Europe) and brake parts (invented and developed in the UK).

cheers
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~~~~~~~~~~~~~~~~~~~~~~Brucey~~~~~~~~~~~~~~~~~~~~~~~~

niggle
Posts: 3423
Joined: 11 Mar 2009, 10:29pm
Location: Cornwall, near England

Re: Full Mudguards for Disk braked Bike

Postby niggle » 8 Aug 2015, 10:47am

Just to add that generally I would recommend Gilles Berthoud stainless mudguards from Planet X though you will almost certainly need to use the long bolt method around the brake calipers due to the thicker alloy stays.

pga
Posts: 274
Joined: 6 Feb 2007, 9:40pm

Re: Full Mudguards for Disk braked Bike

Postby pga » 8 Aug 2015, 11:57pm

Use longer bolts with aluminium tube spacers (from model shops) cut to to length to suit to fit mudguards and rear racks. Note there are rear racks now available designed to project out beyond the disc and be fixed with standard length bolts. However, these do not allow mudguard stays to be fixed at the same place, hence the need to use longer bolts and spacers if both rack and mudguard are to be fitted.

All this should not be necessary if all bike makers sold disc braked bikes suitable for purpose. After all these are often marketed as all purpose suitable for club runs, commuting,touring and, perhaps, a tilt at the Three Peaks.

reohn2
Posts: 40137
Joined: 26 Jun 2009, 8:21pm

Re: Full Mudguards for Disk braked Bike

Postby reohn2 » 9 Aug 2015, 10:38am

Rear:-
Image

P clips can be used but the ones in the photo are from an electrical wholesaler who gave me half a dozen,they're the smallest sized armoured cable brackets,it needed one wrap of inner tube around the rack leg.
The front one can be done like the rack leg in the above photo or like the one's on this bike if the fork has mid leg rack mounts:-

Image
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Snowflake
Posts: 143
Joined: 8 Sep 2011, 10:48pm

Re: Full Mudguards for Disk braked Bike

Postby Snowflake » 9 Aug 2015, 12:24pm

Folks,

Many thanks for the responses........some, fantatsic ideas.............I know she wants a rack fitting as well, so the P Clip option could be the way forward.

Ta

S

Brucey - Changed disk to disc in the title, this is what working with kompewtas does to me :D

Keith Bennett
Posts: 34
Joined: 26 Jan 2009, 12:21pm

Re: Full Mudguards for Disc braked Bike

Postby Keith Bennett » 9 Aug 2015, 1:22pm

Quite a number of ways too solve a problem that should not really be there. This is a design fault The manufacturers design a bike with discs and mudguard eyes that no standard mudguard will fit. Prior to about 1960 it was almost universal for the mudguard eyes to be about three inches above the wheel spindle, Come on manufacturers design a bike that can be used with standard equipment.

reohn2
Posts: 40137
Joined: 26 Jun 2009, 8:21pm

Re: Full Mudguards for Disc braked Bike

Postby reohn2 » 9 Aug 2015, 6:18pm

Keith Bennett wrote:Quite a number of ways too solve a problem that should not really be there. This is a design fault The manufacturers design a bike with discs and mudguard eyes that no standard mudguard will fit. Prior to about 1960 it was almost universal for the mudguard eyes to be about three inches above the wheel spindle, Come on manufacturers design a bike that can be used with standard equipment.


+1
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