[Acadian]

Any of you tinkerers out there - ever made a derailleur protector for thru axle bikes? I’m not talking about the Hanger Banger from north shore billet, but more something like these…

I would like to have something like that on my bike for N* - would definitely help preserve my derailleur.

 

[Fulton]

i think it would be tricky, as there are many different drop out styles and shapes, not to mentino axle diameters from 12 - 20mm. Plus, on a qr bike, you can secure it with the skewer. On alot of dh bikes, the driveside dropout is threaded, so there is not nut to hold the device on. Could be a cool idea though

 

[Transcend]

They cost $5 at Canadian tire Arcadian. Want I should pick you one up?

 

[kidwoo]

You ever see that big black guy with the dreads who rides a reddish armageddon at Northstar? He's got something mounted on his chainstay that looks burly as hell. It's a big flat plate that completely sheilds his derailleur. I think it has DX machined into it. His is the only one I've seen though. It would definitely do the trick but it also increases the chances of tagging your rear end on something.

 

[Acadian]

You ever see that big black guy with the dreads who rides a reddish armageddon at Northstar? He's got something mounted on his chainstay that looks burly as hell. It's a big flat plate that completely sheilds his derailleur. I think it has DX machined into it. His is the only one I've seen though. It would definitely do the trick but it also increases the chances of tagging your rear end on something.

I did see that..was fugly and looked like it weighed a TON. I’m sure there is a simple way to do it without adding ton of unsprung weight back there?

 

[kidwoo]

I did see that..was fugly and looked like it weighed a TON. I’m sure there is a simple way to do it without adding ton of unsprung weight back there?

They cost $5 at Canadian tire Arcadian. Want I should pick you one up?

 

[Acadian]

Something like this maybe...
http://www.farkin.net/forums/album_pic.php?pic_id=13001


CT sux

 

[Acadian]

dude, just learn the absolute width of your bike. If your feet won't fit through without unweighting or hopping, your mech probably won't either.

**I've only taxed 2 der's at N*, one wrecking onto it, the other was a branch flung.**

why should I take advice from a retired biker?

 

[kidwoo]

dude, just learn the absolute width of your bike. If your feet won't fit through without unweighting or hopping, your mech probably won't either.

**I've only taxed 2 der's at N*, one wrecking onto it, the other was a branch flung.**

Yeah but you don't ride northstar that much so your odds are better. :devil:


Like you've never manualed through or landed your back wheel on something that your feet never had to "thread" because they were above or in front of the offending rocks?

 

[OGRipper]

I've seen a couple one-offs over the years. If it was designed to fit everything it would probably have to be too big, but if you're doing something custom it seems like it wouldn't be that hard to design and fab something. As for material you could do it out of a lot of things, some kind of sheet rather than tubes makes sense if you get lots of sticks and weeds. Depending on the frame you could just get longer bolts and attach it where your replaceable drop attaches. Can't say that's a good idea for the frame though.

 

[ChrisRobin]

What that dude is using in that pic is a fairly straight forward solution...just have to 'refine' it a bit so it doesn't look so 'obtrusive'.

 

[Jimmy_Pop]

 

[Spunger]

That would be sick especially if someone could make a guard like that, but offered more mounting options and out of something like Carbon Fiber. I imagine it'd have to be pretty strong. Even though it looks fugly, it's a good idea. You could use 2-3mm maybe thick Carbon Fiber and it should make it strong enough to take a good sized hit.

Or wait until Shimano has the M805 saint derailuer out that mounts to 12mm TA axles. That way there is no bent hangers. I figured I'd give it a try when my XT bites the dust.

I don't know how you'd attach it though with single pivot swingarms, sqaure tubed 4-bar bikes etc... Mounting it would be the tricky part. Making it might be too

 

[Jimmy_Pop]

That would be sick especially if someone could make a guard like that, but offered more mounting options and out of something like Carbon Fiber. I imagine it'd have to be pretty strong. Even though it looks fugly, it's a good idea. You could use 2-3mm maybe thick Carbon Fiber and it should make it strong enough to take a good sized hit.

Or wait until Shimano has the M805 saint derailuer out that mounts to 12mm TA axles. That way there is no bent hangers. I figured I'd give it a try when my XT bites the dust.

I don't know how you'd attach it though with single pivot swingarms, sqaure tubed 4-bar bikes etc... Mounting it would be the tricky part. Making it might be too

i read on mavic's website that you can buy the saint compatible axle for the rear deemax hub. it would be sweet to use a traditional derailleur on the traditional derailleur location but buy that saint axle to use it as a new mounting point for a derailleur guard.

 

[Jimmy_Pop]

im also sure that frame mfr's would appreciate you bolting on a plate of some sort to protect the derailleur which inturn becomes a leverage instrument to reek havoc on their frames.

 

[Spunger]

Well you could always get a longer axle instead of a 12mmx135mm. You could go 12mmx150mm or even 160mm if necessary. It might have to be threaded more but you get the idea.

I think mavic was smart this year making more options for the Deemax wheels (with saint etc...) then previous years. Shimano's onto something as far as mounting goes with the saint, but the only one problem I can see is you have to unbolt the derailuer to take the rear wheel off which some may not like. It shouldn't have any effect on how it operates, but it's another piece comming off to get to something. The added frame protection it gives is worth it though.

I still would think a Carbon one would work best as it's strong and doesn't weight a lot. Problem is making it. The metal one looks like it'd be easier to make/fabricate.

I agree to a point though. I ride in 99% rocky trails here in Santa Barbara and I am aware of how wide my bike is vs the trail. The trail hasn't won yet (haven't busted a derailuer yet) so some of it is paying attention to where you're going. A guard would be nice though...

 

[Juano]

Luc, do you want something like tracy Hannah had?

 

[Juano]

here is a picture of it.

http://photos.farkin.net/2004-Thredbo-National-Round-2/091_G

 

[Acadian]

Luc, do you want something like tracy Hannah had?

Do you guys make some of those?

I have an few old carbon mud guards that I go with my DHi's a while back...I could probably make something out of that?

 

[heikkihall]

Something like this maybe...
http://www.farkin.net/forums/album_pic.php?pic_id=13001


CT sux

Tracy Hannah had something like that on her bike for most of the races I saw her at this year.

 

[Acadian]

Tracy Hannah had something like that on her bike for most of the races I saw her at this year.

last year you mean

Heikki...that could be a nice new project for Dave!

 

[DLo]

http://www.msdhw.com/forum/showthread.php?t=3023&highlight=sinner

Check that?

 

[Acadian]

http://www.msdhw.com/forum/showthread.php?t=3023&highlight=sinner

Check that?

check my original message...that is not what I'm looking for. That's more of a derailleur hanger protector and will do nothing to protect the derailleur itself.

 

[oly]

Wouldnt you first need a bike with a thru axle? I heard your just gonna put a super monster on your 5-spot and rawk hardkore.

 

[Acadian]

Wouldnt you first need a bike with a thru axle? I heard your just gonna put a super monster on your 5-spot and rawk hardkore.

ouch...that hurts.

Hope to get one soon...

 

[lanman]

they make the ones you posted for 20"/24" kids mountain bikes....but would that honestly do anything at all??

 

[Spunger]

here is a picture of it.

http://photos.farkin.net/2004-Thredbo-National-Round-2/091_G

Any better pics or how this is mounted/made?

Looks fugly but it might work. Whatever it is it has to be strong to take a rock vs. the guard impact or otherwise it'll be worthless. I don't think N* needs a guard against dust. Just rocks.

 

[Acadian]

I don't think N* needs a guard against dust. Just rocks.

Amen...same for SB I'm sure.

sometimes you got to put function before looks!

 

[OGRipper]

The Jimmy Pop posted seems like the simplest approach but you can see from looking at it that the basic idea might need to change depending on the frame.

Carbon would be cool but how about titanium? Seems like it would be more durable with impacts, probably similar weight, easier to do custom. Of course for the money you could probably just buy a half dozen derailleurs...

 

[DLo]

check my original message...that is not what I'm looking for. That's more of a derailleur hanger protector and will do nothing to protect the derailleur itself.

Gotcha... I took a quick peak at work and remembered the thread. Sorry I couldn't help!

 

[Jimmy_Pop]

i would think that completely rigid and heavy duty permanently mounted to areas of an aluminum frame that were never designed to have a new bash guard mounted to it is maybe asking for bigger problems.

i think most derailleurs are damaged in incidents that are more grazed in nature than a T-bone accident. A carbon or plastic cover would help deflect a hit and spread the load or impact over a great area not allow the offending object to grab hold a rip the derailleur off.

hell i dont know. it would be cool if mtb's had tabs on the frame to hold something like this:

and hold it on with some kind of QR for easy access:

dream on

 

[OGRipper]

Yeah and it would be really cool if they move the rear derailleur to somewhere and maybe house it inside a big metal box...what's that?...oh wait, nevermind.

 

[CTR]

with the guards the aussie ridders are using it's mainly for sticks/vines more so that rocks, i'd even go so far as to say it's a cairns thing (edge cycles is a shop in cairns) as all of the tracks there are in very dense rainforest and getting your rear mech caught in a fine sucks.

you can't really see it in the pics but the guards are designed to actualy protect the rear mech from stuff that has already come in contact with the swingarm that would normaly brush by taking the mech with it.

(i hope some of that makes sence, it's 38 degrees C here and 80% humidty and i just can't think in these conditions)

 

[dcamp29]

heres what i made. i did the metal part a while ago, but still bent my hanger bad while crashing. i covered the metal piece with the plastic(from a heavy duty trashcan) and it should keep plants and crap out of there and should spread the load around a little.

 

[ÆX]

did i hear the words make carbon?

come up with a design guys

 

[dcamp29]

alex, just make a slider thing but use carbon. people could cut them out of paper, send them to you and you could build them for each individual bike using the cut out people give you. unless that would be too tedious.

 

[OGRipper]

What we need is the new IDGMS: The Internatioal Derailleur Guard Mounting Standard.

Drill and tap a couple mounting holes somewhere on the rear dropout/hanger. If it was designed into the frame in advance it wouldn't be that hard would it?

 

[Sir Happypants]

those arent complicaterd at all they bolt on at two places on the hanger, kids bikes always have them for some reason

 

[Sir Happypants]

thatd be the simpler bottle cage looking things that is

 

[lovebunny]

id def buy one. specially if its form carbon. i love carbon