Boone Bash part deux [Archive] - ObservedTrials.net

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smudge

02-14-2005, 07:17 AM

It seems that quite some time ago, I posted this (http://www.observedtrials.net/vb/showthread.php?t=10113). If you don't want to be bothered to review that post, this is it in a nutshell: I contacted Brett Brown of Boone Technologies to make me a chainring and bash that fit directly onto my 952 XTR cranks. He made the chainring as I requested and life was good...Almost. I still needed a bashguard.

I had been looking for quite some time for a bashguard and ring to fit my cranks, that would eliminate some of the duplicity found when using a standard setup. I couldn't find it, so I designed my own. My experience with Forge-MTB in the UK somewhat publicly ended up not being a very good relationship.

I contacted Brett a few months ago to find out if he was up for making a few things for me. Thankfully, he agreed. Some of you, especially those who are a bit older or have nearly a decade of time in the bike industry, probably remember Boone Technologies from back in the 90's. They made titanium chainrings, cassettes, a unique twisted crankset, bottom brackets and I think even some stems. Brett has re-kindled the Boone torch and has become amazingly popular with singlespeeders and other MTB'rs who are looking for some lighter, longer-lasting chainrings. It's nice to know that now we have another option in the trials industry as well.

http://www.observedtrials.net/otn2/Ring.jpg
The original ring

http://www.observedtrials.net/otn2/Bash_Back.jpg
Back of the bash guard

http://www.observedtrials.net/otn2/Bash_Front.jpg
Front

You can see that the crank drives the chainring directly and the bash has threaded holes for four bolts. I didn't get in until late last night, so I haven't weighed it or mounted it yet, but I will, and I'll update this post when I do.

It's important to note that he doesn't only have the capability to make these for XTR rings. He has the equipment to create just about any mounting interface out there. If you have something like a Middleburn or Truvativ, your best bet is to contact him and see if he already has something for your crank.

If you have questions, feel free to post them here, I'll answer anything related to my bash and ring, otherwise you can contact Brett at browntechnologiesATmindspringDOTcom.

ilneff

02-14-2005, 09:44 AM

wow thats cool.
whats the cost one something like that?

I've wanted to get a boon cog and chain ring for my mtb single speed for a long time.

smudge

02-14-2005, 10:21 AM

wow thats cool.
whats the cost one something like that?

I've wanted to get a boon cog and chain ring for my mtb single speed for a long time.
That is a question best fielded by Brett. I think it's going to depend on how much he has to put into it.

Elan

02-14-2005, 01:20 PM

if it came in 18t, id buy it today

smudge

02-14-2005, 01:22 PM

if it came in 18t, id buy it today
It does come in 18t. He'll make any tooth count you want.

rush

02-14-2005, 01:22 PM

Damn nice work I say, let us know how it holds up.

digby

02-14-2005, 01:57 PM

can you post a pic of what it looks like installed. so the ring bolts onto the chainring, no spider? Is that chainring thick enough to take the abuse?

tybikes

02-14-2005, 02:12 PM

Pretty cool setup. It'll be interesting to see how it holds up to hard impacts.

bwagner

02-14-2005, 02:24 PM

Ebon Dragon

02-14-2005, 05:19 PM

The bashring is in aluminum because he didnt have titanium sheets that thick. Hey smudge i was wondering if i would be able to fit a single speed chain on that beast? Awesome designing by both you and brett. How "wide" are those bolts for the bash... seem a little thin.

smudge

02-14-2005, 08:12 PM

Hey Smudge...Is everything Ti? And not to be a nitpicker, but did he do that chatter effect on the holes on purpose? Just a little curiosity is all. Looks nice though, good luck with it buddy, When are we gonna get a ride in?
Only the ring itself is Ti. The chatter wasn't on purpose. I had sent this design to Brett a while ago...he told me he'd get it done for me before I go to AZ (on Wed). His mill went down last week and he had been waiting for parts to get it up again. He stayed up until 2:30AM last Friday so he could get the bash in the mail so I'd have it before my trip. After working a full day, and then spending the night rebuilding a mill and milling my part, I can deal with some chatter marks...especially since he told me about it before sending it out. Typically his work is exemplary.

Ride? When is the snow going to melt off the rocks? I was out at the watershed last weekend and it was still under 6" of snow :(

smudge

02-14-2005, 08:15 PM

Pretty cool setup. It'll be interesting to see how it holds up to hard impacts.
Yeah, but it's so passe to use the bashguard anymore. I certainly don't use it. Just like I didn't use it HARD while trying to learn taps on that brick wall at C.P. with you and Jerry.

I'm interested to see how it'll hold up too. I've already seen a few improvements that can be made and I'm going to send Brett an updated drawing so other people can benefit.

tybikes

02-14-2005, 08:21 PM

smudge

02-14-2005, 08:36 PM

Sorry, didn't mean it to sound like you slam your bashring on stuff. I try not to use it ever, but I have put some big dings in mine screwing up on bunnyhops, gaps, etc.

Definitely a sweet looking setup. Ive been wanting a new crank set for awhile, but all the FFW stuff is too expensive and/or cheesy, and I hate how big bashrings are on 4-arm cranks.
I'm sorry, I forgot the :ugh: guy. I wasn't trying to be a jerk. I seriously think I broke some bricks that day at C.P. I'll just have to wait and see about the bash holding up to hard hits. I'm sure a pretty hard landing would jack it up.

Depending on your rush, I'm beginning another crank project that would use the new XT cranks. It's going to depend on whether a new friend has an appropriate gear for his lathe. If not, it'll definitely be a few months. If you're interested, ask me next time I see you and I'll give you the details.

Ebon Dragon

02-14-2005, 08:48 PM

:sadwavey: SS chain? :wuteva:

smudge

02-14-2005, 09:09 PM

:sadwavey: SS chain? :wuteva:
Right, sorry. I'll check about the SS chain tomorrow night when I'm packing the bike up. I didn't design it to fit a 1/8" chain, but it may squeeze in there. If it doesn't, it'll just remove some Al from the bash until it works. That's what happened with my Forge bashguard. I'll also take a pic of the bash installed.

Fabi

02-18-2005, 02:24 PM

when will the pictures appear?

Poopslush

02-18-2005, 03:41 PM

I see 'em.

Or are you talking about finished pics?

Fabi

02-18-2005, 04:50 PM

finished pictures, of course.

bumblechunXX

02-18-2005, 07:34 PM

looks cool but i'd break it.

smudge

03-03-2005, 02:55 PM

Oh yes, I forgot to add this pic. Here it is. I can safely say that nothing has resulted in damage to the bash guard since it's installation. I took the bike out to AZ a few weeks ago, rode a bit but managed not to touch the bash. It fits perfectly, I think it looks great and I couldn't be happier with Brett's work.

http://www.observedtrials.net/otn2/DSC01796.JPG

Little Android Man

03-03-2005, 03:00 PM

thats a pretty nice looking setup. like a crank flower. hehe.. it would be cool to have thouhg, looks pretty tough

WhiteRavenKS

03-03-2005, 04:18 PM

holy doo doo that is awesome. i wish i still had xtr crank options...

smudge

03-03-2005, 04:37 PM

What's the deelio Kev? No mo XTR for you? Are the stays on that frame too wide for the arm clearance or what?

I was a bit concerned about going back up to a bigger ring (19t) on the Coust considering the width of the yoke, but since the actual ring sits out wider, it clears without issue.

Sometime later this year, I'm going to see about modifying the current year XT cranks to fit some special front ring. The Q-factor is at least 10mm wider than the 952 cranks and they shouldn't have too much trouble clearing most frames. Plus they're stiffer than AndyT on a Tuesday night.

WhiteRavenKS

03-03-2005, 05:30 PM

i think the new frame will have a wider bb shell. i dont think anyone makes wide shelled xtr bb's... :( im sad because i have like 7 pairs of xtr cranks hahha. oh well.

maybe he could make some shiz for middleburns? actually im sure he could, i think they use the same spider spline as the xtrs?

thetart20

03-03-2005, 06:04 PM

actually im sure he could, i think they use the same spider spline as the xtrs?Quite different unfortunately:

http://www.middleburn.co.uk/spiders.htm

http://www.middleburn.co.uk/images/photos/large/pro_trails_spider_red_2.jpg

smudge

03-03-2005, 07:45 PM

If Middleburn is smart, they made that with a taper too. As much as I love the XTR cranks, that's always been my biggest gripe with them...the splined surfaces aren't tapered and they get loose after a while and you end up with wobbly cranks.

I'm sure Brett can handle the spline.

ilneff

03-03-2005, 07:49 PM

nope xtr and bonz spiders are def.

ilneff

03-03-2005, 07:53 PM

I'm an idiot didn't see page 2

tomacropod

03-03-2005, 07:54 PM

smudge

03-03-2005, 08:08 PM

isn't that why you have an, uh, lockring? And...loctite?

- Joel
You mean there's a lock ring I should be using?

tomacropod

03-03-2005, 09:17 PM

...are you talking about the spider spline or the BB spline?

I thought XTR cranks used a lockring like the 'burns, but with a different shaped spider spline.

- Joel

smudge

03-04-2005, 11:57 AM

...are you talking about the spider spline or the BB spline?

I thought XTR cranks used a lockring like the 'burns, but with a different shaped spider spline.

- Joel
Actually, I'm talking about both. The non-tapered BB spline is what causes the majority of issues, but over time, the spider spline has become relatively mangled.

WhiteRavenKS

03-04-2005, 12:03 PM

thanks tart- i guess i never paid any attention to the spline on the spiders. i must have been thinking about the AC cranks and xtr's being the same? well anyways- thanks for the pics, now i know :)

hmm... now if i could get the middleburn importer to bring over more than like 12 pairs of isis cranks every year that would be grand.

thetart20

03-04-2005, 01:11 PM

thanks tart- i guess i never paid any attention to the spline on the spiders. i must have been thinking about the AC cranks and xtr's being the same? well anyways- thanks for the pics, now i know :)No problem Sir Kevin of Americashire :Wavey: You are indeed correct on the AC/XTR splines being the same.

Oh, and i think the Middleburn spline is un-tapered (got my English is shit today...). Ive never seen a loose one though :)

tomacropod

03-05-2005, 02:23 AM

my non-drive ISIS interface is a little sloppy, but I just loctite the crankbolt and it's fine.

- Joel

smudge

03-14-2005, 12:47 PM

Finally got my first big ride with the new chainring and bashguard this Saturday.

The chainring worked just as it should...perfectly. However, I missed a couple of ups to rear wheel and smacked the bashguard pretty good. The material above the holes collapsed slightly. I completely blame the designer (me) for not having the forsight to prevent such things. It was pretty obvious once I got the part that there wasn't going to be enough material to prevent collapse. Again, it's my fault for not even running a rudimentary FEA test on it. Brett made the part exactly to the design.

I've made the appropriate revisions and will be emailing them to Brett tonight. I should have a replacement very soon.