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Old 03-09-14, 11:33 PM   #1
3speed
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Chain Guard/Thin Bash Guard?

I saw a bike at a rack that had a very thin chain guard bolted on the crank. It was bolted to the outside of the large ring on a triple. I'd really like one to ease my mind worrying about my pants all the time. Anyone know where to get such a product? I've got a 44t large ring with, I think, a 104bcd. It's a 4-bolt Shimano SLX crank.
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Old 03-10-14, 09:02 AM   #2
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I thought Those Shimano 4 bolt cranks come with a plastic one that fits onto the outer chainring..

at least I see them on bikes in my local shop..

maybe Thorn/SJScycles in UK has something .

http://www.sjscycles.co.uk/thorn-hig...11082/?geoc=us

you need longer bolts and spacers , since you essentially will have 3 chainrings to mount.

I added a chainminder inside the granny gear , so it wont jump off the inside easily .

50 views and nobody else tried to look

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Old 03-10-14, 10:20 AM   #3
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My simple fix: old inner tube, trim to size, tie knot, slip around cuff. A chain guard is better. Warm weather is nearly here and we won't be needing such much longer in Texass.
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Old 03-10-14, 10:47 AM   #4
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additional 02p. having a chain-minder on the inside , and a chain-guard disc on the outside ,
there is only the chainring teeth for the chain to settle on ..
actual touring , even when not wearing rain gear .

trouser grease aside .. if that is your issue then you need a better chainguard ,
not only on the outside , but over and around..
as you can still get your trouser cuff caught by the chain and carried over the top
and eaten by the teeth .. have torn some rain pants cuffs in the process..

http://www.amazon.com/SKS-Chainguard.../dp/B002K2H6JE
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Old 03-10-14, 01:27 PM   #5
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Thanks, fietsbob! All I could seem to find were MTB "bash guards" that were for ~36t or less. That Thorn should do the trick.

I might actually think about the full guard too, now that you mention it. Total protection.
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Old 03-10-14, 01:50 PM   #6
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Rivendell has a 5-bolt (XD-2 based) double crank with a chainring guard. Of course it is Rivendell --> pretty looking and over-priced.
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Old 03-11-14, 09:36 AM   #7
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I got frustrated with the high cost of chain/bash guards, I bought a clearance priced 52t chainring that lacked the ramps and pins for about $6 USD and used a saber saw to cut the teeth off of it, then a few minutes with a file. I use this on the outer position on a double crank, it is on a IGH bike so there is no need for a second chainring. It looks much better than I anticipated it would look, although it still is labeled 52T.

As noted above, this option would require longer bolts and spacers if you put it on a crank in addition to the chainrings.
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Old 03-11-14, 10:32 AM   #8
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Have had a few that were machined down on a lathe , adding some kind of backing plate seemed to be needed

so ringing vibrations dont reinforce tool chatter..
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Old 03-11-14, 06:32 PM   #9
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Quote:
Originally Posted by Cyclebum View Post
My simple fix: old inner tube, trim to size, tie knot, slip around cuff. A chain guard is better. Warm weather is nearly here and we won't be needing such much longer in Texass.
Why have the tubes and string...sure its free. I use Velcro and do the same thing. It works great even with a full winter of using it. Just take a piece of hook/loop Velcro and wrap it around the leg above the ankle and then take a piece of the opposite(hook/loop) and put the two together. When the hook/loop gets salty/sandy it doesn't matter. The area that is being used is always being used and it remains clean. I've had no trouble keeping the pant legs out of the way and the Velcro always stayed Velcro-ed. It's probably a lot cheaper than any chain guard.

To the OP you have also have to worry about getting pant legs caught on frame pumps. Instead of using chain guards use Velcro or something like that so your pant legs stay right tight up against the legs and don't flap in the air.
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Old 03-11-14, 06:35 PM   #10
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Yeah, just remembered one thing I used to use that I now use elsewhere on the bike. Bungee cords. They also work quite well at keeping the pant legs out of the way. I like the Velcro much better as it doesn't put any kind of pressure on the legs like bungee cords do.
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Old 03-11-14, 06:55 PM   #11
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I've got a velcro pant thingy. I'd rather not have to bother remembering it(I've had to go back into my house to get it many times), and strapping it on my leg every time I go ride. And sometimes I'm going somewhere where I don't want to have that on my leg when I get there. Then I have to have accommodations for it when I get there. Not that any of those things are a big deal really, but I'd rather just have no deal at all, big or small. A chain guard would be nice to have.
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Old 03-11-14, 07:57 PM   #12
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stuffing the pants cuff in my sox works fine. ..

though I have a chain-guard and wear black pants to hide any grease contact..

53-130, 38-110. a 54 came on my mountain drive , the ice bike has a now discontinued
salsa saw tooth looking 48t

my loaded touring bike has a 50t

Last edited by fietsbob; 03-11-14 at 08:03 PM.
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