Deda Dog Fang

MIsterGoof
MIsterGoof Posts: 128
edited July 2008 in Workshop
Whilst reading about cadel Evans bike I saw he had a Deda Dog Fang

having never heard of this I went to investigate and it seems a nifty little gadget.

Does anyone out there use this?

Comments

  • magliaceleste
    magliaceleste Posts: 748
    I've never understood why you need these if your bike is set-up right? I don't think I've ever thrown a chain on a road bike.

    Seems even stranger on pro bikes as they have their own team mechanics, yet they do use them.
  • redddraggon
    redddraggon Posts: 10,862
    magliaceleste wrote:
    I've never understood why you need these if your bike is set-up right? I don't think I've ever thrown a chain on a road bike.

    Seems even stranger on pro bikes as they have their own team mechanics, yet they do use them.

    It's better to be safe than sorry, and it's not as though it's hard to get under 6.8Kg on pro bikes these days.

    It's recommended that you use one with a triple chainset, I fitted one to my nephew's triple equipped bike this week and I fitted one to my winter bike with a double as well.

    They're only £5 or £6 so it wasn't braking the bank, I thought I might aswell fit them.
    I like bikes...

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  • AlanW
    AlanW Posts: 291
    For a Shimano triple they are a must. When you shift to the inner granny ring, the force that the chain is fired across even the best set up will sometimes see the chain jump off and wrap around the bottom bracket. Worst still, then get it dragged around on the wrong side of the chain stay......trust me, I know. :(

    And to be honest I would fit one to a double set up if I were on a carbon frame, in fact Scott fit them as standard to all of their high end frames now. Low cost and very little weight, better to be safe than sorry!
    "You only need two tools: WD40 and duct tape. If it doesn't move and it should, use WD40. If it moves and it shouldn't, use duct tape"
  • aracer
    aracer Posts: 1,649
    I've got one on my bike. Even if set up perfectly, it is still possible to dump the chain to the inside when shifting under load - this is just a little insurance.
  • Monowai
    Monowai Posts: 329
    I use one for cyclocross and seems to do the job. On a road bike it can be used as a reason to be lazy about setting up your front mech properly, but as stated above, when you are a pro, it's better to be safe than sorry.

    Oh yh and if you want one, they are pretty cheap here: http://www.zepnat.com/component/page,sh ... Itemid,48/
    Cake makes me happy
  • James_London
    James_London Posts: 530
    With compact or larger than normal gaps between rings (ie >14T) they're worth using for insurance. For 39/53 or 42/53 I'd agree they're pretty pointless.
  • Mystique
    Mystique Posts: 342
    Call me stupid, but...

    Exactly where/ how do they fit??
  • AlanW
    AlanW Posts: 291
    edited July 2008
    Mystique wrote:
    Call me stupid, but...

    Hello stupid,

    On the down tube just under the front mech. Made of plastic, open the loop and wrap around the tube, fit screw to stop it sliding down.

    Has lump moulded on it like a..........well like a dog fang oddly enough!

    This then rests about a couple of mm from the smallest chain ring, thus stopping the chain from dropping to the inside and wrapping around the bottom bracket.

    Well worth fitting no matter what size rings you are using IMHO.
    "You only need two tools: WD40 and duct tape. If it doesn't move and it should, use WD40. If it moves and it shouldn't, use duct tape"
  • James_London
    James_London Posts: 530
    Inside the little ring like this:
    http://www.cyclingnews.com/photos/2005/ ... G_0456.jpg
  • James_London
    James_London Posts: 530
    BTBR wrote:
    Mystique wrote:
    Call me stupid, but...

    Hello stupid,

    On the down tube just under the front mech. Made of plastic, open the loop and wrap around the tube, fit screw to stop it sliding down.

    Has lump moulded on it like a..........well like a dog fang oddly enough!

    This then rests about a couple of mm from the smallest chain ring, thus stopping the chain from dropping to the inside and wrapping around the bottom bracket.

    Well worth fitting no matter what size rings you are using IMHO.

    It's more traditionally installed on the seat tube, other stupid! :-)
  • Mystique
    Mystique Posts: 342
    Consider me educated...what a simple idea, I like it.
  • FCE2007
    FCE2007 Posts: 962
    I've fitted one but it has never come into play.
    Powered by Haribo.
  • AlanW
    AlanW Posts: 291
    James_London wrote:
    BTBR wrote:
    Mystique wrote:
    Call me stupid, but...

    Hello stupid,

    On the down tube just under the front mech. Made of plastic, open the loop and wrap around the tube, fit screw to stop it sliding down.

    Has lump moulded on it like a..........well like a dog fang oddly enough!

    This then rests about a couple of mm from the smallest chain ring, thus stopping the chain from dropping to the inside and wrapping around the bottom bracket.

    Well worth fitting no matter what size rings you are using IMHO.

    It's more traditionally installed on the seat tube, other stupid! :-)

    Doh................... :oops:
    "You only need two tools: WD40 and duct tape. If it doesn't move and it should, use WD40. If it moves and it shouldn't, use duct tape"
  • carlstone
    carlstone Posts: 602
    If you sre going to fit one to a carbon frame just check that the seat tube doesn't flare too much at the bottom bracket as if it does the dog fang wont fit in its proper place.
    Carl.
  • schilbach
    schilbach Posts: 101
    Just ordered mine - Got caught out on Strang foot, changing down under load and jammed the chain next to BB and also took off the laminate of some of the carbon frame - plus lost 15 minutes unjamming it!
  • Cyrenne
    Cyrenne Posts: 184
    I've just been out to next doors Alsatian with me pliers....£3.25? No chance.
  • Nuggs
    Nuggs Posts: 1,804
    My chain's slipped off before, so I'm going to invest.

    I notice that wiggle offer two sizes - how do I know which is the correct one?
  • il_principe
    il_principe Posts: 9,155
    Nuggs wrote:
    My chain's slipped off before, so I'm going to invest.

    I notice that wiggle offer two sizes - how do I know which is the correct one?

    Erm measure your seatube diameter - purchase accordingly?
  • over-the-hill
    over-the-hill Posts: 144
    I've only lost the chain on the outside. What do you need for that, a dogs dick?
  • redddraggon
    redddraggon Posts: 10,862
    over-the-hill wrote:
    I've only lost the chain on the outside. What do you need for that, a dogs dick?

    You need to make sure the limit screws are set right, I can't see how, if the screws are set right, the chain will fall off to the outside.
    I like bikes...

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  • Nuggs
    Nuggs Posts: 1,804
    jashburnham wrote:
    Nuggs wrote:
    My chain's slipped off before, so I'm going to invest.

    I notice that wiggle offer two sizes - how do I know which is the correct one?

    Erm measure your seatube diameter - purchase accordingly?
    Thanks (good sarcasm) - I wasn't sure what the measurement referred to (diameter or clearance).
  • aracer
    aracer Posts: 1,649
    carlstone wrote:
    If you sre going to fit one to a carbon frame just check that the seat tube doesn't flare too much at the bottom bracket as if it does the dog fang wont fit in its proper place.
    Carl.
    Mine flares at the bottom, but I got it to fit with a bit of work removing some plastic with a penknife.
  • over-the-hill
    over-the-hill Posts: 144
    redddraggon wrote:
    over-the-hill wrote:
    I've only lost the chain on the outside. What do you need for that, a dogs dick?

    You need to make sure the limit screws are set right, I can't see how, if the screws are set right, the chain will fall off to the outside.

    I have set the limit screw so that I can only just achieve the last click on the lever that stops the chain rubbing in the highest gears. This seems to work but doesn't feel as positive.
  • primalcarl
    primalcarl Posts: 579
    Last sunday whilst freewheeling around the car park waiting for my friend to sort his gear out, I changed chain wheels and dropped the chain. It got nicely jammed and took the paint off in several places down to the metal. The mech is setup correctly, I was turning the pedals too slowly for it to shift properly. Wish I knew these existed before I damaged my dream bike!

    Worth the money for sure
    www.csimages.info
  • schilbach
    schilbach Posts: 101
    schilbach wrote:
    Just ordered mine - Got caught out on Strang foot, changing down under load and jammed the chain next to BB and also took off the laminate of some of the carbon frame - plus lost 15 minutes unjamming it!

    For the record - mine arrived and it doesn't fit my focus cayo - and if you're riding any triple can't see it fitting unless it's a skinny frame bb area!

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