Nuke Bowel Posted May 25, 2009 Report Share Posted May 25, 2009 I have started to build a frame on Marinobikes.com for my girlfriend as I have so many parts I'd prefer to get her a frame in a color she wants at a good price.First of all, what bb type do I choose?Secondly, where it says bb rise, I want to put 304mm as that's what I'm copying from the geometry from a Specialized Myka womens specific frame, but it will only allow me to insert two digits, what do I put? Lastly, what do I put for Brake mount spacing?Cheers Luke Quote Link to comment Share on other sites More sharing options...
that NBR dude Posted May 25, 2009 Report Share Posted May 25, 2009 304mm is the BB height, not the rise. The BB rise is the difference up from the wheel axel. The BB height is the Radius of the wheel + the BB rise Quote Link to comment Share on other sites More sharing options...
Nuke Bowel Posted May 25, 2009 Author Report Share Posted May 25, 2009 304mm is the BB height, not the rise. The BB rise is the difference up from the wheel axel. The BB height is the Radius of the wheel + the BB riseThat explains it then, cheers!Could you possibly find me a nice rise height that would suit her?Cheers Quote Link to comment Share on other sites More sharing options...
The Duck Posted May 25, 2009 Report Share Posted May 25, 2009 That explains it then, cheers!Could you possibly find me a nice rise height that would suit her?Cheers304mm minus the radius of the wheel? Quote Link to comment Share on other sites More sharing options...
indianatrials Posted May 25, 2009 Report Share Posted May 25, 2009 For a normal 68mm shell, get a euro BB style. For brake mount spacing, get 100mm if it is a trials bike. Quote Link to comment Share on other sites More sharing options...
Nuke Bowel Posted May 25, 2009 Author Report Share Posted May 25, 2009 304mm minus the radius of the wheel?which is? Sorry i'm a bit dull!For a normal 68mm shell, get a euro BB style. For brake mount spacing, get 100mm if it is a trials bike.sorry it's an mtb! Quote Link to comment Share on other sites More sharing options...
Leistonbmx Posted May 25, 2009 Report Share Posted May 25, 2009 which is? Sorry i'm a bit dull!sorry it's an mtb!Measure from the centre of the wheel axle to the edge of the rim, there you have your radius.What sort of rim's going on the back? Quote Link to comment Share on other sites More sharing options...
that NBR dude Posted May 25, 2009 Report Share Posted May 25, 2009 Are they 24" or 26" wheels?? If they are 24" wheels, then 304mm is a 0mm rise. If they are 26" wheels, then 304mm is a 25mm drop Quote Link to comment Share on other sites More sharing options...
Nuke Bowel Posted May 25, 2009 Author Report Share Posted May 25, 2009 Measure from the centre of the wheel axle to the edge of the rim, there you have your radius.What sort of rim's going on the back?How can I if i don't have the bike yet?I just need a diameter I can knock in there, if someone could come up with one.This is the geometry I'm nicking clickyI'll be running mavic cross max disc's as I have some hereAre they 24" or 26" wheels?? If they are 24" wheels, then 304mm is a 0mm rise. If they are 26" wheels, then 304mm is a 25mm drop26", thank you very much, so the bb rise is -25mm? Quote Link to comment Share on other sites More sharing options...
that NBR dude Posted May 25, 2009 Report Share Posted May 25, 2009 will be a 25mm BB drop then Quote Link to comment Share on other sites More sharing options...
Nuke Bowel Posted May 25, 2009 Author Report Share Posted May 25, 2009 will be a 25mm BB drop then i probably sound really dull here, but as it says on the builder Bb rise: mmIf I put 25mm that's a rise, and your saying It's a drop, So how do I go about writing that in there? Quote Link to comment Share on other sites More sharing options...
Leistonbmx Posted May 25, 2009 Report Share Posted May 25, 2009 (edited) Just put it as -25mm. ( a negative rise would suggest a drop, eh?)EDIT: just remembered you said it's two digits.You could try phoning them? Edited May 25, 2009 by Leistonbmx Quote Link to comment Share on other sites More sharing options...
Adam-Griffin Posted May 25, 2009 Report Share Posted May 25, 2009 Just put it as -25mm. ( a negative rise would suggest a drop, eh?)EDIT: just remembered you said it's two digits.You could try phoning them?In Peru ? Wouldn't be cheap... Quote Link to comment Share on other sites More sharing options...
Nuke Bowel Posted May 25, 2009 Author Report Share Posted May 25, 2009 Right, We have come to the concusion I want a - 25 bb drop, euro bb, but all I need to know now is what brake mount spacing I need?I am right in saying I want a 135mm vertical 10mm drop outs?Or am I incorrect.Many thanks, with these answers sorted i'll be able to order Quote Link to comment Share on other sites More sharing options...
Ladd Posted May 25, 2009 Report Share Posted May 25, 2009 (edited) Right, We have come to the concusion I want a - 25 bb drop, euro bb, but all I need to know now is what brake mount spacing I need?I am right in saying I want a 135mm vertical 10mm drop outs?Or am I incorrect.Many thanks, with these answers sorted i'll be able to order ignore me. Edited May 25, 2009 by Ladd Quote Link to comment Share on other sites More sharing options...
Alex Dark Posted May 26, 2009 Report Share Posted May 26, 2009 (edited) Right, We have come to the concusion I want a - 25 bb drop, euro bb, but all I need to know now is what brake mount spacing I need?I am right in saying I want a 135mm vertical 10mm drop outs?Or am I incorrect.Many thanks, with these answers sorted i'll be able to order yerp sounds about right for a standard mtb rear hub setup if its vee mount spacing they're normally 80mm? Edited May 26, 2009 by Alex Dark Quote Link to comment Share on other sites More sharing options...
Rich J Posted May 26, 2009 Report Share Posted May 26, 2009 Could give him an email? Tell him what you want as much as possible and he will sort/suggest the rest? Quote Link to comment Share on other sites More sharing options...
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