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ghetto bashguard?

1800 Views 12 Replies 10 Participants Last post by urbanmtb87, Mar 27, 2006

adamantane

Discussion Starter · Dec 28, 2005

thinking of dropping my big chainring for a bashguard..just don't use that much and it acts as a bashguard anyway

catalogs show these thiings are pretty expensive but appear to be fairly easy to cut from somehting

i don't have metal working tools so i'm wondering if anybody got a piece of thick polycarbonate and cut one out...then drilled some holes and mounted it up alright

wondering how thick it can be, since chainring bolts have a certain length....countersink the holes for these as well?

anybody? thanks

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scrublover

· #2 · Dec 28, 2005

adamantane said:
thinking of dropping my big chainring for a bashguard..just don't use that much and it acts as a bashguard anyway

catalogs show these thiings are pretty expensive but appear to be fairly easy to cut from somehting

i don't have metal working tools so i'm wondering if anybody got a piece of thick polycarbonate and cut one out...then drilled some holes and mounted it up alright

wondering how thick it can be, since chainring bolts have a certain length....countersink the holes for these as well?

anybody? thanks

been done by a few people. yep, either countersink the holes, or run longer chainring outer bolts (yes, they exist.) don't overtighten, or you'll just crack whatever you use. i don't think i'd trust a homemade poly guard of less than 10mm thickness.

caveat: regular poly stuff available off the shelf won't last as long as the poly guards made for it. nearly every homemade poly guard i've seen has eventuallly cracked.

if you've no metal working tools, you're going to have a pretty [email protected] hard time cutting and drilling the poly stuff, too. unless you have access to tools to do so, buying the tools needed to do it with alu or poly will likely run you more than the cost of a half decent guard anyhow. or paying someone who has the stuff to do it.

at this point, just run your outer ring into ground as a basher. just bend it back/break off a few teeth every now and then.....

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adamantane

Discussion Starter · #3 · Dec 28, 2005

scrublover said:
been done by a few people. yep, either countersink the holes, or run longer chainring outer bolts (yes, they exist.) don't overtighten, or you'll just crack whatever you use. i don't think i'd trust a homemade poly guard of less than 10mm thickness.

caveat: regular poly stuff available off the shelf won't last as long as the poly guards made for it. nearly every homemade poly guard i've seen has eventuallly cracked.

if you've no metal working tools, you're going to have a pretty [email protected] hard time cutting and drilling the poly stuff, too. unless you have access to tools to do so, buying the tools needed to do it with alu or poly will likely run you more than the cost of a half decent guard anyhow. or paying someone who has the stuff to do it.

at this point, just run your outer ring into ground as a basher. just bend it back/break off a few teeth every now and then.....

yeah, cutting a circle is not trivial...maybe it is, but have not seen the tool lying around here at work...we've got some nice industrial strenght polycarb sheet though, 1/2 in thick stuff...man it would look trick on my bike too

guess i need to talk to wood working dudes and pick thier brains a bit

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schwing_ding

· #4 · Dec 30, 2005

Seriously, you already have one and you mentioned it, the large chainring. Know anyone with a dremmel? Put the cutoff wheel on and trim the teeth. I wouldn't eliminate them completely as a little traction may make things less slippery. If you were to buy a large ring, may I suggest one from Raceface. They are the thickest I have found, save the tooth area which will be trimmed anyway, and hold up quite well.

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lush

· #5 · Dec 31, 2005

Bbg

adamantane said:
thinking of dropping my big chainring for a bashguard..just don't use that much and it acts as a bashguard anyway

catalogs show these thiings are pretty expensive but appear to be fairly easy to cut from somehting

i don't have metal working tools so i'm wondering if anybody got a piece of thick polycarbonate and cut one out...then drilled some holes and mounted it up alright

wondering how thick it can be, since chainring bolts have a certain length....countersink the holes for these as well?

anybody? thanks

If your not looking for one that really burly try this guy. It was under $15 shipped. I have it on my 1x8 speed. You will have to insert a spacer on the inside to reach your 11T cog. He personalized it if you wish

http://cgi.ebay.com/BBG-BASHGUARD-B...ryZ56193QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

BBG Bashguard on E-bay. I love mine.

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adamantane

Discussion Starter · #6 · Dec 31, 2005

lush said:
If your not looking for one that really burly try this guy. It was under $15 shipped. I have it on my 1x8 speed. You will have to insert a spacer on the inside to reach your 11T cog. He personalized it if you wish

http://cgi.ebay.com/BBG-BASHGUARD-B...ryZ56193QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

BBG Bashguard on E-bay. I love mine.

saw that, whats the thickness...looks pretty clean

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socallush

· #7 · Jan 4, 2006

adamantane said:
saw that, whats the thickness...looks pretty clean

3mm, not very thick but for $11, I can but three for the cost of any other.

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PCC

· #8 · Jan 4, 2006

Hmm, I have a miniature mill, a rotary table, and 4mm thick 7075 T6 aluminum stock...

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scrublover

· #9 · Jan 5, 2006

socallush said:
3mm, not very thick but for $11, I can but three for the cost of any other.

and you'll need to buy 3, if you use it for any kind of bashing other than to have it on for looks.

3mm won't last long as even a small duty bashring. if you only want it to help keep the chain on the ring it'll work, but you'll destroy it hitting it on anything.

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mcfly

· #10 · Jan 5, 2006

nashbar has a "nashguard" for $15.

i bought one for my SS conversion. it's close to 1/4" thick and looks nice. the "N" logo is covered by my crank arm too.

there was one in the returned goods section the other day for $10....

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AnotherWingnut

· #11 · Jan 19, 2006

adamantane said:
thinking of dropping my big chainring for a bashguard..just don't use that much and it acts as a bashguard anyway

catalogs show these thiings are pretty expensive but appear to be fairly easy to cut from somehting

i don't have metal working tools so i'm wondering if anybody got a piece of thick polycarbonate and cut one out...then drilled some holes and mounted it up alright

wondering how thick it can be, since chainring bolts have a certain length....countersink the holes for these as well?

anybody? thanks

use a hacksaw to cut the teeth off the big ring, then file remainder down to the shoulder (base of teeth) takes about 45mins and a bit of elbow grease. Tools needed, hacksaw, metal file, vice...
regards, David

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ferday

· #12 · Jan 19, 2006

some of you guys have obviously never "bashed" anything...a big ring will fold under the slightest impact, i've destroyed several by accident on my XC bike. problem is they fold, break, cut legs, and make the middle ring unrideable when they fold over. get a friggin real bashguard, they're all over the classifieds for 10 bucks...

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urbanmtb87

· #13 · Mar 27, 2006

I've made a "bashring" out of 1/8" sheet aluminum to replace my big ring. (Cut it out on a bandsaw). It didn't hold up too well. You could make a pretty decent bashring out of 1/4" aluminum sheet metal by bandsawing it and then countersinking the bolt holes.

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