snoolax Posted October 24, 2009 Report Share Posted October 24, 2009 hi guys,anyone knows if its possible to add spacer between the headtube and fork crown so that my bike will have a heigher front? its similar to using a longer fork.. Quote Link to comment Share on other sites More sharing options...
Revolver Posted October 24, 2009 Report Share Posted October 24, 2009 It is not a good idea. The crown sits on a wider bit of the forks, and if you space it out, there will be less of that. It's just simply a bad idea. Quote Link to comment Share on other sites More sharing options...
basher Posted October 24, 2009 Report Share Posted October 24, 2009 you would have to get a new crown machined thats thicker, so that it still sits on the wider part of the steerer tube and also spaces Quote Link to comment Share on other sites More sharing options...
snoolax Posted October 24, 2009 Author Report Share Posted October 24, 2009 thanks! how bout between the bottom of the head tube and the headset? i am just thinking of ways to correct the geometry my frame(yes its norco) without getting a geo corrected fork Quote Link to comment Share on other sites More sharing options...
Revolver Posted October 24, 2009 Report Share Posted October 24, 2009 thanks! how bout between the bottom of the head tube and the headset? i am just thinking of ways to correct the geometry my frame(yes its norco) without getting a geo corrected forkEven worse idea.Get a geo-corrected fork. Quote Link to comment Share on other sites More sharing options...
durkie Posted October 24, 2009 Report Share Posted October 24, 2009 there is a company that makes a headset that has a thicker lower headset cup, for the purpose of bumping the front end up. i think it only adds 5mm and i can't remember the name of the company though. Quote Link to comment Share on other sites More sharing options...
PaRtZ Posted October 24, 2009 Report Share Posted October 24, 2009 you definitly cant pack out inbetween the headset lower cup + the fork crown, because the two parts are designed to interface directly with each other, and infact putting something in between would completely remove the point of them.As said, your best bet is to get a thick crown on your forks to bump the height up, but really, this isn't going to be much more than 10mm to be honest. If you look at the bottom of the steere tube on a pair of forks, the tube tapers out at the bottom to ensure a tight fit on the crown. This taper isn't 'thickest' for a lot of the steerer so anything too much is going to be very unstable.Sorry, but theres not much you can do apart from stem stackage or bar + stem combos. Quote Link to comment Share on other sites More sharing options...
enima Posted October 24, 2009 Report Share Posted October 24, 2009 There is Cane Creek headset like this: Quote Link to comment Share on other sites More sharing options...
LEON Posted October 25, 2009 Report Share Posted October 25, 2009 It's a norco, it's never gonna have a very high bb, it's made for a sus fork so all you can do is buy a chunky headset, long forks, tyre with a high profile, and not much else. Quote Link to comment Share on other sites More sharing options...
jambo Posted October 25, 2009 Report Share Posted October 25, 2009 Nico Vouilloz had a spacer machined for his mega avalanche bike to correct the geometry of his bike because he wanted to run lighter shorter travel fox 32 forks. So it is possible. Quote Link to comment Share on other sites More sharing options...
2sixstreet Posted October 25, 2009 Report Share Posted October 25, 2009 Anything is possible but it will be a custom job. A sleeve that has a female interference fit onto the top of the crown and has the same male top profile for the race would work. Quote Link to comment Share on other sites More sharing options...
jambo Posted October 25, 2009 Report Share Posted October 25, 2009 custom all the way im sure you could get an engineering company to make up something, childs play for them. Quote Link to comment Share on other sites More sharing options...
snoolax Posted October 26, 2009 Author Report Share Posted October 26, 2009 thanks guys!just did some measurements my bike is at a BB of -30. high Bb is not my cup of tea, just wish to get it to neutral..guess the options i have now is some custom engineering or just grab a geocorrected fork. Most prob will go with getting the geo corrected fork, custom engineering is pretty a hassle in my area.still new to geometry and stuff, may i ask how significant is the difference between a netural and a -30 in terms of feel and peformance? and are there any advantages of using a slight negative BB? Quote Link to comment Share on other sites More sharing options...
LEON Posted October 26, 2009 Report Share Posted October 26, 2009 That's gonna need one hell of a front end boost to gain 30mm at the bb. If you have a norco I assume you didn't buy it to sidehop 50" and do front wheel gaps, it's never intended to be used with a rigid fork so with a small sus for the bb probably is level. It's made for ryan leech to be ridden that way, What norco is it by the way? Post a pic, and what do you ideally want out of a bike?Leon Quote Link to comment Share on other sites More sharing options...
snoolax Posted October 26, 2009 Author Report Share Posted October 26, 2009 (edited) http://www.flickr.com/photos/38178465@N05/4018412997/here is a pic of it of course i dont expect crazy gaps or jumps, just wish to know will this drop affect my learning curve and performance.. I more into lines than distances and height, which is why i went for the norco.. but well currently i am only to do basics like trackstands, hops and rock so i cant judge much myself..thanks for all help again guys!Edit: its not that obvious in the first photo, Bb drop is clearer herehttp://www.flickr.com/photos/38178465@N05/4018410739/ Edited October 26, 2009 by snoolax Quote Link to comment Share on other sites More sharing options...
CurtisRider Posted October 26, 2009 Report Share Posted October 26, 2009 just get some longer forks, like some old pures or something Quote Link to comment Share on other sites More sharing options...
LEON Posted October 26, 2009 Report Share Posted October 26, 2009 Yea that's one of the later ones, bb drop doesn't look all that to be honest, thought you had an old norco like I had, that was a proper bb drop lol.Just get some longer forks cos fattys are very short, Too short for me to wanna use them.What's the wheelbase? Quote Link to comment Share on other sites More sharing options...
snoolax Posted October 26, 2009 Author Report Share Posted October 26, 2009 oh my norco is old enough? think mine is a 2004? didnt know there was old hahajust measured the wheel base.. not sure if its really accurate but its like 1060.. thick tyres makes measuring hard..btw will carbon fork work for trials? its tough to get old production geometry corrected forks in my area.. Quote Link to comment Share on other sites More sharing options...
Luke Rainbird Posted October 26, 2009 Report Share Posted October 26, 2009 Tyres make no difference to your wheelbase Quote Link to comment Share on other sites More sharing options...
LEON Posted October 26, 2009 Report Share Posted October 26, 2009 Well I had the 2002 norco which was 1017 wheelbase....lol, and that visibly had about a 50mm bb drop with a pashley rigid fork.I wouldn't use a carbon fork, onza lite guys are a really nice size fork, you might wanna try a Kona project 2 as well, but fattys are about as short as it gets. Quote Link to comment Share on other sites More sharing options...
snoolax Posted October 26, 2009 Author Report Share Posted October 26, 2009 thanks! how long is the onza lite guy? went to their site but they didnt say anything bout the specs..oh i still wish to have more opinion on how will a lower bb affect performance, other than increased stability? Quote Link to comment Share on other sites More sharing options...
LEON Posted October 26, 2009 Report Share Posted October 26, 2009 Not sure on length, probably 410mm ish, but it has a small rake, fatty has a lot of rake which increases wheelbase.Your bb is fine for street riding, bunnyhops, manuals etc (however your long wheelbase will make this alot harder)A longer fork will push the frame up and make the head angle slightly slacker which will make much more difference than 5mm up or down on the bb height. Quote Link to comment Share on other sites More sharing options...
snoolax Posted October 26, 2009 Author Report Share Posted October 26, 2009 thanks! yup i agree that bunny hops on it is a breeze, lifts real well.. not sure bout manuals yet since i stll can execute them (damn!)not sure bout the head angle on it but i am already finding it quite slack.. at least feels more slack that my stock czar of 72 degree..what might be an ideal tune up for it now if my priorities are bunnyhopes, manuals, and some rear wheel pedal kick hops and a couple of nose moves? Quote Link to comment Share on other sites More sharing options...
LEON Posted October 26, 2009 Report Share Posted October 26, 2009 Just a longer fork really, all you can do, it will be slacker but it'll bunny hop easier, i'm surprised it bunnyhops well at that length even with the steep head angle Quote Link to comment Share on other sites More sharing options...
snoolax Posted October 26, 2009 Author Report Share Posted October 26, 2009 Just a longer fork really, all you can do, it will be slacker but it'll bunny hop easier, i'm surprised it bunnyhops well at that length even with the steep head anglefrom feel the angle doesnt seem really steep, feels less than 72 for me when i try pivoting (in relative to my 72 HA Czar stockbtw is there any way which i can physically measure headangle? Quote Link to comment Share on other sites More sharing options...
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