Danny Kearns Posted May 7, 2008 Report Share Posted May 7, 2008 (edited) Loads of different Geometry's on different websites for different frames:GU ST 26" 08 (Stock)Selectbikes:Wheelbase: 1085mmChainstay Length: 380mmBB Rise: 40mmHead Angle: 72°Tartybikes:Wheelbase: 1085mmChainstay Length: 380mmBB Rise: 45mmHead Angle: 72 degreesCentre of BB shell to top centre of head tube: 670mm (26.5")TrialFutur:Wheelbase: 1085mm Chainstays 380mm BB: +40mm Head Angle: 72 degreesGU Typhoon '08 (Stock)SelectBikes: Wheelbase: 1085mmChainstay Length: 375mmBB Rise: 60mmHead Angle: 71 degreesTartybikes:Wheelbase: 1085mmChainstay Length: 375mmBB Rise: 60mmHead Angle: 71 degreesCentre of BB shell to top centre of head tube: 660mm (26")Trials-UK:Wheelbase 1085mmChain stays Length: 380mmBB Rise: + 60mmHead tube length 115mmHead Angle: 72 DegreeHow come ? Edited May 7, 2008 by Danny Kearns Quote Link to comment Share on other sites More sharing options...
Mark W Posted May 7, 2008 Report Share Posted May 7, 2008 BB height varies depending on forks used. Tarty usually specify which one, but in that they 100% definitely measure the components they sell, I'm more inclined to believe them than what are effectively Ctrl C'd + Ctrl V'd details. Quote Link to comment Share on other sites More sharing options...
Alex Dark Posted May 7, 2008 Report Share Posted May 7, 2008 tarty nearly always measure with echo urbans, where as the rest oif the websites probably get their info form deng himself who probably measures witht he relative forks ( e.g pitbull with pitbull forks, le with gu forks etc ) these can all be slightly different lengths and rake and so would affect the bb rise and wheelbase slightly Quote Link to comment Share on other sites More sharing options...
Matthew_Gibson Posted May 7, 2008 Report Share Posted May 7, 2008 I heard somewhere that Tarty press a headset into the bikes and measure them with that in. Other shops may just use the geo quoted my Deng on his websites/ emails /whatever. Quote Link to comment Share on other sites More sharing options...
AdamR28 Posted May 7, 2008 Report Share Posted May 7, 2008 I heard somewhere that Tarty press a headset into the bikes and measure them with that in. It's very rare for the manufacturer's stated geo to be right... Quote Link to comment Share on other sites More sharing options...
ogre Posted May 8, 2008 Report Share Posted May 8, 2008 tarty, why do you use echo urbans? i understand it sets a standard to compare all frames by but most of us are tarts and will buy matching brand forks, would it be too dificult to also give brand specific geo, espcially on the mbk? which comes with mbk forks. meh i know i already stated the main reason, but surely it would make sence to give the appropriate fork geo to. Quote Link to comment Share on other sites More sharing options...
Revolver Posted May 9, 2008 Report Share Posted May 9, 2008 tarty, why do you use echo urbans? i understand it sets a standard to compare all frames by but most of us are tarts and will buy matching brand forks, would it be too dificult to also give brand specific geo, espcially on the mbk? which comes with mbk forks. meh i know i already stated the main reason, but surely it would make sence to give the appropriate fork geo to.I'd imagine its so that it makes it easier to compare.the GU has a high bb, but with short forks it doesn't. If it was measured with short forks then you'd buy it thinking, this is nice and low, and use your own forks and be completely surprised.I think its urbans as well because they're the most popular forks. Quote Link to comment Share on other sites More sharing options...
Mark W Posted May 9, 2008 Report Share Posted May 9, 2008 most of us are tarts and will buy matching brand forksI doubt it's the majority, to be fair? If they've got one headset and one set of forks that are "The Measuring Forks", it's a lot better than having to potentially damage stock by pressing on a crown race, fitting it to the frame and measuring it, when you could just have one set of forks with a race permanently on that you could just bang in? Plus having a standard is way better than just random sizes. I'm assuming the Urban was one of their more popular forks, so they just used what a lot of people use? Quote Link to comment Share on other sites More sharing options...
basher Posted May 9, 2008 Report Share Posted May 9, 2008 I always go with tartys measurements as they always measure the frames up and give a proper full geo with the reach lenght which is an important measurement that riders neglect. But doesnt mean that other companies arnt measureing and it could be especially with deng frames that frame to frame the geo is slightly different and there not all made exactly the same. Ino my gu mod measure 15mm longer than stated on sites. But also different companies may measure them with different forks giving different geos. Quote Link to comment Share on other sites More sharing options...
AdamR28 Posted May 9, 2008 Report Share Posted May 9, 2008 Plus having a standard is way better than just random sizes. I'm assuming the Urban was one of their more popular forks, so they just used what a lot of people use?That was our thinking too, same forks and headset for all frames means you can compare the geo of each frame, rather than having more than one variable Quote Link to comment Share on other sites More sharing options...
PaRtZ Posted May 9, 2008 Report Share Posted May 9, 2008 Can people honestly say they notice 5mm worth of rise/wb/chain stay ?Obviously I can understand if its 50mm but 5mm.... Quote Link to comment Share on other sites More sharing options...
Luke Rainbird Posted May 9, 2008 Report Share Posted May 9, 2008 I noticed going from a short control to a Zenith.5mm longer wheelbase5mm shorter stays5mm higher BBWhen I looked into it, I thought "meh it's only 5mm here and there" but it made such a difference due to the factors adding up etc. It meant I was in a far more leany forward position, and it felt wank Giving a measurement with a standardised setup is awesome - it lets you compare frames to each other, and if you want to know what it'll be like with your individual setup, you just have to factor that in to the standard, as opposed to looking through dozens of frames and forks to get everything on a level in your mind Quote Link to comment Share on other sites More sharing options...
Jamie_Neal Posted May 9, 2008 Report Share Posted May 9, 2008 (edited) That was our thinking too, same forks and headset for all frames means you can compare the geo of each frame, rather than having more than one variable Best way to do it and I guess Tarty/the others don't want to spend all day trying all the different combinations and then doing a table to go on the web.Also you should be able to make a rought guess as to how different forks are going to affect the Geo as Tarty also provide the rake and length.My '04 Control (long) has gone from 1085 with a +20bb with Urban forks to a 1080 with a +30bb (measurements are about right) but I was able to work out what was going to happen (roughly - shorter and higher bb) before I bought the forks thanks to the info off Tarty's site.5mm can make enough difference as long as its the difference you want.Although if they were really bored it would be possible to produce a table of how control forks would alter a bike compared to urbans (e.g. -5mm wheelbase, +10mm BB) but it would be a bit of a ball ache plus it would also depend on head angle. Edited May 9, 2008 by Jamie_Neal Quote Link to comment Share on other sites More sharing options...
Muel Posted May 9, 2008 Report Share Posted May 9, 2008 I measured up my 07 maggy Lite, it had a +55mm BB, the 08 disc has a +60mm and it did make a difference, it was pretty small it did feel a bit nicer to ride. Quote Link to comment Share on other sites More sharing options...
Captain Scarlet Posted May 9, 2008 Report Share Posted May 9, 2008 07/08 Lite (magura mounts) has a 60mm BB rise.To be honest guys its 5mm, thats half a centimetre, does it really make a difference? Quote Link to comment Share on other sites More sharing options...
Mark W Posted May 10, 2008 Report Share Posted May 10, 2008 As we've repeatedly gone over - to some people, yes. Some people just naturally are more observant when it comes to changing their bike setup than ever. I notice it when I'm riding my BMX if I've had to move my wheel back 'cos my chain's gone slack, but I know some people who ride whatever they happen to have at the time. Different strokes for different folks. Quote Link to comment Share on other sites More sharing options...
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