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Why So Many Stem Stackers?


Matt Vandart

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i am a bicycle mechanic,and i know wht i am talkingbout.crmo does bend a long time before it will snap.except heat treated shit.

weight is the last thing i am thinking about,i´d rather think about staying alive doing my already dangerous sport.

i´ll have to sig someones lightweight freakyness post when i hear of him getting smacked because his aluminium bars snap lol.

a good bar should have about 550g if its crmo,otherwise it could snap because of the heat treatening it needs to be that light.

street trials isnt comp,its more street,and with my 92kgs i need reliable parts

just my opinion

edit:stackers suck cos theyre ugly...

Edited by FamilyBiker
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I don't really need to thanks, I'm aware of how heat treating can be used to improve certain properties in certain instances. I kinda gave up giving a shit around the time you just posted a load of disjointed, slightly contradictory, poorly written bull concluded with such a retarded statement.

Parts snap when they're abused or not fit for purpose, whether that's alu or otherwise. Use parts that aren't up the job and expect them to break, that's a given.

To then state rather bluntly that we should all be using cromo bars (but only that are over 550g of course) while you're trying to make a semi-reasonable point somewhere in there, on the other hand, is pretty counter-productive.

To summarise;

i am a bicycle mechanic,and i know wht i am talkingbout.

I'll believe it when I see it.

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i am a bicycle mechanic,and i know wht i am talkingbout.crmo does bend a long time before it will snap.except heat treated shit.

Tarring all "heat treated shit" with the same brush seems pretty ridiculous bearing in mind there are countless different methods and ways of "heat treating shit" which will give said "heat treated shit" different properties. For example, in the BMX world when everyone started going mental over "heat treated shit" certain companies (e.g. Odyssey with their 41Thermal heat treatment process) nailed it, but others f**ked up massively and basically made easily snappable parts.

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but others f**ked up massively and basically made easily snappable parts.

sorry my shitty way do post depends on the fact i am german,and my english isnt so good.had a shitty day,too.

i was still talking about the atomlabs,and above is the right answer for those.

have seen the tension diagrams and not going to buy them now

didnt want to post otn style,lets just go on the nice way

Edited by FamilyBiker
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My experience seemingly supports FamilyBiker. Two pairs of the old gusset prison bars and two pairs of bmx bars I had all bent rather than snapped and supposedly they weren't heat treated whereas the newer prison bars (without the brace), that are supposedly heat treated, just snapped. This happened when I pulled up for a bunnyhop which is in one of the videos I made last year. They didn't show any signs of being bent leading up to that.

I wouldn't like to make an absolutist statement but I thought that was the general behavior of those materials when treated as such even if the heat treatment does make them strong they will snap rather than bend when they do go?

I should note that I also don't really know what I'm talking about :P

Edited by Ben Rowlands
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Odyssey products are made/heat treated in a totally separate factory to anyone else in any bike-related industry, as far as I'm aware.

I know someone with the Districts and they feel pretty nice. I was initially sceptical because of the amount of rise/small bar clamp, but they seem to be holding up really well. Tempted by a set for my next bars, mainly 'cos the reduced upsweep feels awesome.

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Odyssey products are made/heat treated in a totally separate factory to anyone else in any bike-related industry, as far as I'm aware.

I know someone with the Districts and they feel pretty nice. I was initially sceptical because of the amount of rise/small bar clamp, but they seem to be holding up really well. Tempted by a set for my next bars, mainly 'cos the reduced upsweep feels awesome.

i know it sounds dumb,but in my experience the 25.4/22.2 shims seem to compensate some of the stress at the bar clamp area.just a thought,i have no evidence for that.

but have seen the same bars snapping in a bmx stem (22.2),as holding up well in a 25.4 mtb stem,with the same guy riding them the same way.

maybe a "monday"-set of bars,but who knows.

when it comes to handlebars,tensile strenght of high grade aluminium is lower than of steel in most cases,so is elastic module,too,wich is the point.

fact.

sorry,dont beat me again

Edited by FamilyBiker
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when it comes to handlebars,tensile strenght of high grade aluminium is lower than of steel in most cases,so is elastic module,too,wich is the point.

fact.

sorry,dont beat me again

This is more important than its tensile strength in this application.

As I said workhardening is probably what leads to alloy bars having sudden catstrophic failure rather, and hence the perception of steel bending before it snaps and alu just straight out snapping.

I could be wrong but there you go.

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