durkie

Right I think that is most people's experience with them. I Just had to pay special attention to it because the mounts on my frame are not perfectly square, and I noticed that part of it depended on which top/bottom made up the clamp.

I don't think so - the magura mounts are slightly concave to mate with the plastic washer. Don't know if it'd grip very well. About the TR mounts - they themselves are not machined perfectly square. You might have to mix and match tops and bottoms to get things to line up well on your bike.

they're very close...

yep...that was mine i heard that the knurling got ground off pretty quickly at koxx days. i made a knurling machine back in september and did loads of patterns. the cross-hatch one you got seriously performed the best of all of them (which is, as you know, not very good). but it was fun to make something. better things down the pipeline soon (hopefully).

Uh-huh. I had to warranty a snapped axle and told them I did freeride. My wheel came back (after warranty work done and everything) and had a receipt with "Type of Riding: TRIALS" written on it. No point in asking anyone on here. You need to talk to King.

i don't have any pics handy, but i would say that sport is all about bike handling and that you won't see anything over 2 feet high....but it might be a 2 foot 90 degree drop from a log on to some pointy rocks (there was a sport section like that at the most recent TTC comp: sport line enters riding a telephone pole, has to get off of it to the right side on to some rocks, turn left, get over a foot-high rock and you're out). so just try for really technical riding and don't worry about any sort of big moves. or better yet, just come down and ride with us in atlanta and we'll show you right

seriously? isn't the whole point of buying a chris king cause it has a freaking 10 year warranty on it?

It'd be worth doing because I don't think anyone else has tried it yet and you'd have maybe slightly lower maintenance/weight. It wouldn't be worth doing because trials bikes don't roll and there's not really a good reason to spend the money on super nice bearings.

So do I, and I'm surprised to hear you compare the three alloys by their elasticity. Alloying has almost no effect on a material's elastic modulus. All aluminums will have approximately the same modulus. Also 7075 is really heavy? As far as I can tell there's a ~3% difference between the density of 7075 and 6061.

i didn't think they made frames out of 7075 because i thought it was one of the harder and more brittle aluminums. i thought it was more of a chainring/cog alloy. and it also seemed that 7005 had fallen out of favor for some reason, cause last manufacturer i remember using it in trials was planet x for the zebdi. now it seems to be back.. but regardless, they've been making frames out of each of those alloys for a long time, so i'd venture that they're all pretty close to each other in terms of strength, cost, etc. you could start by going to matweb.com and looking up stress/strain charts for those alloys. it's interesting stuff to know, but i wouldn't draw too many conclusions from it...strength is only part of the equation: there's cost, fatigue from cyclical loading, frame geometry, tubing thickness, proper welding, proper technique in doing your 360, etc.

if the freewheel is up front, rotating the cranks one full circle rotates the freewheel one full circle, or 72 engagement points. for gear ratios greater than 1, rotating the cranks one full circle rotates the rear cog more than one full circle (think hardest gear ratio on a road bike: 52 up front, 13 in the back, or that rear wheel completes 4 revolutions for each one crank revolution). so in the case of 24:18, your ratio is 1.333, so you get 72 * 1.333 = 96 total engagement points per crank revolution.

hah. duh. i saw the lgms in the picture on the spares menu and didn't get any further.

So now that you folks are offering refills, any chance of getting CRM refills?

they do flex, and everyone wants better brakes. carbon fiber backings absolutely have the potential to be much stiffer and lighter than plastic and cnc'd aluminum backings. whether or not these will actually do it is another issue. as for how they look, you are all just spoiled. every other carbon part you see is just super finished and glossed over. this is what carbon fiber looks like - black. they probably could have done more on the finish, but they are just pad backings and they already cost $37.

it will last for a while, but you're still subjecting it to wear, so it will start going at some point. it's like rocks in a river...sure they're rocks and they're only subjected to flowing water, but they all wear smooth eventually... i would at least imagine through that the anodized colors would last longer than powder coated colors. if you REALLY want them to last, use a disc. then your only problem is that anodized colors fade in the sun after several years.

Haha...sorry to screw this thread even further, but I think it is supposed to be prounced Eee-no, because it is just the word "ONE" backwards - it's their single speed line of products (if you've seen other white industries ENO products, the letters are all written backwards) ACS is just Eh see ess though. and i abstain on GU

Oli, this is a really great project. I really like your work, and I even have a friend that wants to ride bicycles, but can't because one of her hands is too small (birth defect) to pull a brake lever, so good on you. I was wondering if you could tell us something about how you got manufacturing rolling on this: how did you find a company willing to do it? what kind of negotiations went on with intellectual property, profit sharing, etc? do you have to commit to a batch of 5000 or something? are you funding out of your own pocket or is the uni helping out? is it made in china? how was it dealing with them? etc... Sorry for the ton of questions but basically any detail you can tell me about how you took this from design to reality I'd love to hear. Craig

So, that whole thread brings up something I've been really wondering about the UK, since I'm from the states and don't really know what it's like to live in the UK. And I'm sure a lot of you are wondering if it's all fatties and SUVs over here, so feel free to ask away about that. But my question is: what the hell is going on in the UK? from an outsider's perspective, the country seems to be getting totally f**ked as far as surveillance, paranoia, distrust, inability simply to talk to people, assuming the worst, anything that's different is dangerous/wrong, etc. I present to you the following to make my point: Police identify 200 children as potential terrorists Anti-teenager "pink lights to show up acne" New campaign to urge Londoners to report specific activity London imposes de-facto 9PM curfew for under 16s That stuff is all from one website within just the month of march. The trials yobs thread then brought up citizens spying on each other, and people being accused as pedos for taking pictures, and I'm sure there's all sorts of other weird stuff going on over there that the rest of the world doesn't know about yet. So really: what the hell is going on over there? To be honest, one of the weirdest parts about this is that it isn't happening in the US (as much), and that it's hit diverse, liberal Europe instead. And to be fair, it's probably happening to some degree everywhere. But Britain seriously seems like it's on some crazy fast track to spy on everyone their entire lives and encourage people to fear things. Does anyone seem to care? Do you even notice CCTV cameras these days? And not to be too cheesy, but probably the most recent popular states-side movie set in England is V for Vendetta, and it is somehow very fitting. Genuinely curious. Craig

mcmaster.com probably ships to canada. they have everything

i had a frame with this same problem...and i could put in my ck headset by hand on a new frame. the owner of the company personally assured me that it would not be a problem once everything was tightened down, and for the most part it was. i think it's just a tolerances thing....that the headtube was reamed to some plus tolerance and the headset was machined to some minus tolerance, and that big gap between them causes looseness. but it didn't become a problem until now, two years later, and i just shimmed a pig and it works great again.

or an internal hub. then you have 14 gears, much less maintenance than a derailleur system, and gear changing from a standstill. except that nylons and urethanes and polyethylenes and... all have better wear and abrasion than steel. and with carbon fibers in the belt, it has the potential to be much stronger than a chain. that's true. doesn't mean there can't be a beefier version for trials. motorcycles use belts after all, and they put down a hell of a lot more torque than trials does. zero lubrication, less mess, longer life, lighter weight, fewer moving parts. give it a chance!

i'm pretty sure that the belt is reinforced with unidirectional carbon fibers.

my understanding has been that hydroforming helps disperse stress simply by increasing weld area at joints. I can't think of any examples of structural hydroforming that aren't at a tube junction. it seems analogous to (as everyone knows) why they glue critical portions of airplanes together instead of bolting/riveting them - you want to distribute forces over as large an area as possible, and if you use bolts, you have basically several small points where forces are distributed, whereas with glue you have forces transferred over the entire area of the glued portion.

I'm almost certain that those are the same as "genuine" spanish fly brake pads. I'm pretty sure plazmatic just renamed some out of the catalog brake pad, which I thought was offered by Baradine, but now I can't find it. Anyways, that explains why the molding pattern for the spanish fly magura pads is completely different from plaz pads (and hasn't reappeared since), and also why spanish fly v-pads are completely different from the plaz machined v backings.

pretty thorough walkthrough here. double check if you missed anything?