Mark W Posted November 29, 2011 Report Share Posted November 29, 2011 No, nothing like that. Adam made it for me on the lathe here - it's basically a 'ring' that adds the height, and is held in place by having a sort of plug screwed through it, which then tightens into the threaded section on my Inspired forks. My headset preload bolt tightens into the plug itself, so basically it's all held in place nice and tight. There's not really much to see - it just looks like there's a line going around my steerer tube at one point (naturally it has to be flush with the rest of the steerer so my stem slides over it). Quote Link to comment Share on other sites More sharing options...
monkeyseemonkeydo Posted November 29, 2011 Report Share Posted November 29, 2011 No, nothing like that. Adam made it for me on the lathe here - it's basically a 'ring' that adds the height, and is held in place by having a sort of plug screwed through it, which then tightens into the threaded section on my Inspired forks. My headset preload bolt tightens into the plug itself, so basically it's all held in place nice and tight. There's not really much to see - it just looks like there's a line going around my steerer tube at one point (naturally it has to be flush with the rest of the steerer so my stem slides over it). Ah fair enough, sounds pretty bomb proof to be fair doing it like that. Probably stronger than it was before if the plug is as I imagine it. Quote Link to comment Share on other sites More sharing options...
Mark W Posted November 29, 2011 Report Share Posted November 29, 2011 Indeedy. It also works pretty well as I run my headset over-tight, and usually I annihilate every starnut type setup I use. No such issues with this, which is nice Thanks again to Ads Quote Link to comment Share on other sites More sharing options...
chris4stars Posted November 29, 2011 Report Share Posted November 29, 2011 (edited) I find the more scary thing about that setup is the fact the steerer was extended to allow that many stackers to be used... That just sounds so wrong to me! FamilyBiker- what bike do you ride? Why do I get the feeling you're actually a proper street rider rather than a trials rider? it wasnt extended - that was the length of the steerer before cutting. i cut it, then decided to reattatch when i wanted more rise (after seeing the likes of mr rowlands setup etc) i refer back to the original post i made showing his, im sure its more than mine? and ive seen plenty of others with around 4cm... * edit * just read the post below this - this is exactly what i did with a random topcap i had. only difference is that i used the original cut off piece, and not a piece off another fork so it fit together nicely Edited November 29, 2011 by chris4stars Quote Link to comment Share on other sites More sharing options...
Ali C Posted November 29, 2011 Report Share Posted November 29, 2011 I (did) have a less complicated version where I just cut off the threaded section of an Inspired topcap, threaded that so half the threads were in my forks and half were sticking out the top (loctited in) and then used a small section of fork that had been cut off another pair and screwed that onto the exposed thread. worked great! I extended it by about 10mm and never had any issues. Quote Link to comment Share on other sites More sharing options...
monkeyseemonkeydo Posted November 29, 2011 Report Share Posted November 29, 2011 it wasnt extended - that was the length of the steerer before cutting. i cut it, then decided to reattatch when i wanted more rise (after seeing the likes of mr rowlands setup etc) But it was extended back to the original pre-cut length, if you get me. The steerer wasn't one piece in the end, which would worry me! Quote Link to comment Share on other sites More sharing options...
onza pro series guy Posted November 29, 2011 Report Share Posted November 29, 2011 street trials isnt comp,its more street, sorry to bring this back up but I've just read the thread and it reaks of, well retardedness; I can smell your special scent from here! Quote Link to comment Share on other sites More sharing options...
monkeyseemonkeydo Posted November 29, 2011 Report Share Posted November 29, 2011 sorry to bring this back up but I've just read the thread and it reaks of, well retardedness; I can smell your special scent from here! Did you read the couple of bits that say he's German? In other news, ok, I get it, I'm a worrying old fart! Quote Link to comment Share on other sites More sharing options...
Mark W Posted November 29, 2011 Report Share Posted November 29, 2011 I (did) have a less complicated version where I just cut off the threaded section of an Inspired topcap, threaded that so half the threads were in my forks and half were sticking out the top (loctited in) and then used a small section of fork that had been cut off another pair and screwed that onto the exposed thread. worked great! I extended it by about 10mm and never had any issues. Just to point out I also used to use this same setup as Ali and it worked fine. Only reason I changed was because I annihilated every type of star nut/glued-in-nut setup I used. Quote Link to comment Share on other sites More sharing options...
chris4stars Posted November 29, 2011 Report Share Posted November 29, 2011 But it was extended back to the original pre-cut length, if you get me. The steerer wasn't one piece in the end, which would worry me! fair enough - i ran for a good while though with forks before those with the stem barely clamping on to much more than it is in that pic - there was about a cm or so of no steerer and that never hinted at showing an issue! retrospectively id not use that now, but it was fine the forces involved with the extention as it is just wouldnt effect the steerer, the stem clamp would have to snap before the steerer went if you get me?! Quote Link to comment Share on other sites More sharing options...
FamilyBiker Posted November 29, 2011 Report Share Posted November 29, 2011 i meant this.. Quote Link to comment Share on other sites More sharing options...
Ali C Posted November 29, 2011 Report Share Posted November 29, 2011 we didn't Quote Link to comment Share on other sites More sharing options...
Mikee Posted November 29, 2011 Report Share Posted November 29, 2011 I (did) have a less complicated version where I just cut off the threaded section of an Inspired topcap, threaded that so half the threads were in my forks and half were sticking out the top (loctited in) and then used a small section of fork that had been cut off another pair and screwed that onto the exposed thread. worked great! I extended it by about 10mm and never had any issues. And it is still going strong! How much have you extended yours by Mark? I want an extra 5mm or so more, so I was going to replicate the one Ali has made but 5mm bigger but I wasn't sure what it would be like to have that much of the stem clamped onto an extension. Quote Link to comment Share on other sites More sharing options...
FamilyBiker Posted November 29, 2011 Report Share Posted November 29, 2011 (edited) @monkeyseemonkeydo:my bike´s the marino 24 in the bike pics section.street frame converted to-well it has skye geo,but 365mm chainstays. will be replaced soon by a 360 chainstay 1020 wheelbase frame,and to go for more trialsy stuff a dedicated trials one. btw,i finished the rebuild of a dualdrive hub to singlespped recently.has 72 clicks now (8pawls)and 560g. unfortunately its 36h,wich makes the rim choice harder. i extended a steerer with an aluminium tube and the cutoff part from shortening the steerer. heated the steel steerer and cooled down the alu thingy to -35° with nitrogene,then put together with nice little hammer strokes. THIS is forever. named cryofit,but i wouldn´t call it that haha ali your solution reminds me of the good old LEGO or CONSTRUCTA sets.awesome(just kidding) Edited November 29, 2011 by FamilyBiker Quote Link to comment Share on other sites More sharing options...
Sam Nichols Posted November 30, 2011 Report Share Posted November 30, 2011 I don't really have anything significant to add except that some people need to research what 'heat treating' actually is and the effects it has on metal in a little more depth. I'm only really posting though 'cause I thought you guys might want to see me punching a wall.. http://www.facebook.com/video/video.php?v=10150727544375153 Quote Link to comment Share on other sites More sharing options...
Topsy Posted November 30, 2011 Report Share Posted November 30, 2011 Is there actually something like a guide as to when you should replace your bars? I don't really fancy mine snapping at all... Quote Link to comment Share on other sites More sharing options...
Revolver Posted November 30, 2011 Report Share Posted November 30, 2011 You should be able to see stress marks before they snap. You could watch out for those, I suppose. Quote Link to comment Share on other sites More sharing options...
Matt Vandart Posted November 30, 2011 Author Report Share Posted November 30, 2011 (edited) The three times I've broken things front end related I've had the same thing. Each time it was landing a gap, so my bike just went 'see you later' and jetted off into the distance while I had a quick sit down. EDIT: Actually, the fourth time was my steel bars breaking, and I still rode out of the line EDIT 2: Speaking of sitting down after front end related issues: Steerer tube snappage! i HAVE to tell it to you,though i hate to say it(cos i wanted to buy them,too): these are district bars! the preload thing is probably because when comprimating(i hope this word really exist) and pulling then to gain height you get a serious ammount of bending force into the bars.and no matter if its alu or steel,many few have an elastic module of more than 8-15%,wich together with tensile strength is fundamentalfor the bars holding up or not. there can be dynamic forces at around 2k newton each end of the bar (90kg rider,700mm bar(lever 300-330,depending on stem clamp,means pulling force aprox. 400N/grip) holy s**t,would somebody please beef up any bar immediately?? have i ever told any of you how difficult it is to explain such things in english when your german? pfffft... U understand exactly what you are saying. Problem is the maths does not explain it. If it was just down to exceeding the 'strength' of the bar during a move then bars would not last past the first move if you get me. It is down to work hardening in alloy bars. Steel bars snap because they are either under-engineered or they have a fault in them. Under engineered as in the flex is past the elastic limit, or a fault in the tube or weld. As you know as long as you don't exceed the elastic limit in steel you can flex it effectively forever. Edited November 30, 2011 by Matt Vandart Quote Link to comment Share on other sites More sharing options...
FamilyBiker Posted November 30, 2011 Report Share Posted November 30, 2011 Steerer tube snappage! U understand exactly what you are saying. Problem is the maths does not explain it. If it was just down to exceeding the 'strength' of the bar during a move then bars would not last past the first move if you get me. It is down to work hardening in alloy bars. Steel bars snap because they are either under-engineered or they have a fault in them. Under engineered as in the flex is past the elastic limit, or a fault in the tube or weld. As you know as long as you don't exceed the elastic limit in steel you can flex it effectively forever. youre right.finally someone does understand me... Quote Link to comment Share on other sites More sharing options...
FamilyBiker Posted December 8, 2012 Report Share Posted December 8, 2012 (edited) epic mega bump!tried this,and damn,it works great.ht is 100mm though,sooo.... Edited December 8, 2012 by FamilyBiker Quote Link to comment Share on other sites More sharing options...
dave33 Posted December 8, 2012 Report Share Posted December 8, 2012 I'd be alot more worried about steerer tube snapage than bar snapage Quote Link to comment Share on other sites More sharing options...
ghostrider88 Posted December 8, 2012 Report Share Posted December 8, 2012 I'd be alot more worried about steerer tube snapage than bar snapage Why is that?just curious because I think the result would be the same? 1 Quote Link to comment Share on other sites More sharing options...
clerictgm Posted December 9, 2012 Report Share Posted December 9, 2012 When I changed my bars to TT HR, oh my god.. I had got a Bike! This thing before TT HR was more likely a stool. High rise is sooo comfy and controllable. And also I want to know: is it OK? Quote Link to comment Share on other sites More sharing options...
FamilyBiker Posted December 9, 2012 Report Share Posted December 9, 2012 (edited) it isnt!middle of the top bolt is minimum edit:steerer tube snappage is really unlikely with my setup,running a 2,5mm wall thickness crmo steerer and a single 50mm spacer(custom made) Edited December 9, 2012 by FamilyBiker Quote Link to comment Share on other sites More sharing options...
clerictgm Posted December 9, 2012 Report Share Posted December 9, 2012 On complete Inspireds steerer tubes are precutted? Quote Link to comment Share on other sites More sharing options...
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