HOT: Active* forum members generally gain 5% discount at starbike.com store!
Weight Weenies
* FAQ    * Search    * Trending Topics
* Login   * Register
HOME Listings Articles FAQ Contact About




Post new topic Reply to topic  [ 22 posts ] 
Go to page 1, 2  Next
Author Message
PostPosted: Sat Mar 03, 2012 7:17 am 
Offline

Joined: Mon Aug 15, 2011 10:41 am
Posts: 83
Location: Melbourne, Australia
hey guys,

well at the moment i am going to build a custom cyclocross bike from scratch, with the help from my boss/ frame builder.

the bike is going to built out of steel tubing and hopefully will be a sram force/ ultegra Di2 equipped....
the perpose of this bike is for a school project and to race on, since im in need of a cyclocross bike..

I created some rough sketches before finally deciding on what type of geo to choose.
hopefully i can use a true temper s3 tubing or a columbus spirit tube set.

i have also created a blog: http://cyclocrossdreams.blogspot.com.au/" onclick="window.open(this.href);return false; which tracks all my progress.

THANKS :D


Attachments:
Screen shot 2012-03-03 at 5.17.20 PM.png
Screen shot 2012-03-03 at 5.17.20 PM.png [ 142.25 KiB | Viewed 2959 times ]

_________________
CARPE DIEM
Colnago C59 Italia GLBK
Up coming custom steel cyclocross :D
Top
 Profile  
 
PostPosted: Sat Mar 03, 2012 6:01 pm 
Offline

Joined: Thu Jan 26, 2006 6:01 pm
Posts: 1498
Your BB drop is VERY low on that drawing. Pretty much the highest BB I've ever seen on a CX bike.... it might handle a bit odd. Also, the chain stays are a bit long for a racing bike, but not outrageous. I like a ~425mm chain stay on my cx bikes. Everything else looks reasonable.


Top
 Profile  
 
Posted: Sat Mar 03, 2012 6:01 pm 


Top
  
 
PostPosted: Sun Mar 04, 2012 5:46 am 
Offline

Joined: Mon Aug 15, 2011 10:41 am
Posts: 83
Location: Melbourne, Australia
i revised the geometry, any feedback?


Attachments:
Screen shot 2012-03-04 at 3.45.22 PM.png
Screen shot 2012-03-04 at 3.45.22 PM.png [ 123.24 KiB | Viewed 2827 times ]

_________________
CARPE DIEM
Colnago C59 Italia GLBK
Up coming custom steel cyclocross :D
Top
 Profile  
 
PostPosted: Sun Mar 04, 2012 2:20 pm 
Offline

Joined: Thu Jan 26, 2006 6:01 pm
Posts: 1498
77mm of BB drop is too much :) Seriously, I'm not trying to be a pain. But, most CX race bike have BB drops of about 61mm (Ridley, considered to have a very high BB.) to 70mm (considered low, like Specialized Stevens, etc).

I personally like about 65-67. I think if you are anywhere in that range you will be OK and can live with it. If you come more from a road background, I would opt for a bit lower BB. (i.e. more drop) of about 67mm. It will help with stability in cornering at speed.


Top
 Profile  
 
PostPosted: Sun Mar 04, 2012 5:27 pm 
Offline

Joined: Fri Nov 21, 2008 3:23 pm
Posts: 215
Location: Boulder, Colorado
I prefer BB drop in the 70mm range. I also have a custom in the 80mm range. If you race tight smooth courses the 80mm drop kicks butt. If you race lots of rough terrain with off cambers the 70mm will help with hitting the pedals. I hate bikes with drops less than 70mm. I also like a shorter rear end. 425cm or a hair longer depending on clearance issues. Otherwise I would go with this build.

_________________
2 Serotta's, 1 Spectrum, 1 Van Dessel, 1 Parlee & 1 Carl Strong, & 1 Titus.


Top
 Profile  
 
PostPosted: Tue Mar 06, 2012 9:40 pm 
Offline

Joined: Wed Jan 25, 2006 8:32 pm
Posts: 540
Location: Bow of a Farr 40
Good for you for putting in a bit of slope for the TT. It looks more compact than horizontal and I've yet to understand why sloping is an issue. I'm a bigger guy (184cm) so rider bigger frames so perhaps i've not encountered the issue.

The technique I use is the grap the handlebar and TT - reasoning is why lift the bike higher than is absolutely necessary? It's wasted energy...

What kind of material? What kind of HT? What fork? What kind of BB? What kind of cable routing?


Top
 Profile  
 
PostPosted: Tue Mar 06, 2012 9:58 pm 
Offline
User avatar

Joined: Sat Sep 05, 2009 11:20 am
Posts: 1306
sloping is fine on larger frames but on the smallest it can make it difficult onto the shoulder without bashing the frame against it. I don't know what your courses are like but the ones I compete often have longer runs up steps or steep muddy banks which require the extra hand to help you up.

_________________
"Step forward the climber and all those who worship at the altar of lightness" - R. Millar


Top
 Profile  
 
PostPosted: Thu Mar 08, 2012 6:48 am 
Offline

Joined: Mon Aug 15, 2011 10:41 am
Posts: 83
Location: Melbourne, Australia
thanks for the feedback guys, really appreciate it :)
i did my FINAL sketch for the bike, keeping in mind all of your suggestions.



another question, what tubing set should i use, incorporating the integrated seat post? i've emailed english cycles, but i haven't received a reply :( keep in mind want to keep it fairly light :D

thanks


Attachments:
Screen shot 2012-03-08 at 4.48.28 PM.png
Screen shot 2012-03-08 at 4.48.28 PM.png [ 139.33 KiB | Viewed 2545 times ]

_________________
CARPE DIEM
Colnago C59 Italia GLBK
Up coming custom steel cyclocross :D
Top
 Profile  
 
PostPosted: Thu Mar 08, 2012 6:37 pm 
Offline

Joined: Thu Mar 08, 2012 5:59 pm
Posts: 4
simonanks69 wrote:
the perpose of this bike is for a school project and to race on, since im in need of a cyclocross bike..

Where are you going to school?


Top
 Profile  
 
PostPosted: Thu Mar 08, 2012 11:30 pm 
Offline

Joined: Mon Aug 15, 2011 10:41 am
Posts: 83
Location: Melbourne, Australia
I attend scopus memorial college.
Does anyone have any suggestions for tubing which will incorporate the ISP?

_________________
CARPE DIEM
Colnago C59 Italia GLBK
Up coming custom steel cyclocross :D


Top
 Profile  
 
PostPosted: Fri Mar 09, 2012 2:57 am 
Offline

Joined: Thu Jan 26, 2006 6:01 pm
Posts: 1498
If it is being tig welded, I think that Life tubing is a good mix of light weight and acceptable stiffness.


Top
 Profile  
 
PostPosted: Fri Mar 09, 2012 11:13 am 
Offline

Joined: Mon Aug 15, 2011 10:41 am
Posts: 83
Location: Melbourne, Australia
even for the 711mm seat post

_________________
CARPE DIEM
Colnago C59 Italia GLBK
Up coming custom steel cyclocross :D


Top
 Profile  
 
PostPosted: Fri Mar 09, 2012 5:19 pm 
Offline

Joined: Thu Jan 26, 2006 6:01 pm
Posts: 1498
No, I think Life would be light for a steel ISP tube of that length. But, it's best to check with a builder.

What type of head are you thinking of using? We have some Speedvagens, one with the Thomson head and the other with the Enve. Both are really nice.


Top
 Profile  
 
PostPosted: Fri Mar 09, 2012 11:01 pm 
Offline

Joined: Sun Aug 23, 2009 10:38 am
Posts: 413
135mm rear spacing and disc brakes would make is complete.


Top
 Profile  
 
PostPosted: Sat Mar 10, 2012 2:03 pm 
Offline

Joined: Mon Aug 15, 2011 10:41 am
Posts: 83
Location: Melbourne, Australia
i have to use canti's since im using a pair of training wheels to minimise cost.

_________________
CARPE DIEM
Colnago C59 Italia GLBK
Up coming custom steel cyclocross :D


Top
 Profile  
 
Posted: Sat Mar 10, 2012 2:03 pm 


Top
  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 22 posts ] 
Go to page 1, 2  Next


Who is online

Users browsing this forum: No registered users and 2 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  

   Similar Topics   Author   Replies   Views   Last post 
There are no new unread posts for this topic. Attachment(s) S-WORKS Venge - Custom Paint Project #3

[ Go to page: 1, 2 ]

in Introduce Yourself / Gallery - Please use metric weights.

mile2424

20

1588

Tue Apr 01, 2014 8:27 pm

glepore View the latest post

There are no new unread posts for this topic. TREK Domane 6.9 - Project 1 custom build.

[ Go to page: 1, 2 ]

in Introduce Yourself / Gallery - Please use metric weights.

diegogarcia

19

2116

Wed Mar 05, 2014 3:47 pm

Ypsylon View the latest post

There are no new unread posts for this topic. Parlee Z1 - Custom Geo & Custom Paint

in Introduce Yourself / Gallery - Please use metric weights.

Velovecycles

10

1490

Thu Dec 26, 2013 2:58 pm

Velovecycles View the latest post

There are no new unread posts for this topic. Cyclocross Skinsuit

in Cyclocross / Touring

Maximilian

3

903

Sun Nov 03, 2013 8:16 am

gt5504b View the latest post

There are no new unread posts for this topic. C24's for cyclocross

in Cyclocross / Touring

chiltonp

5

985

Mon Sep 16, 2013 11:09 pm

Frans View the latest post


It is currently Fri Apr 18, 2014 1:20 pm

All times are UTC + 1 hour




Advertising   –  FAQ   –  Contact   –  Convert   –  About

© Weight Weenies 2000-2013
hosted by starbike.com


How to get rid of these ads? Just register!


Powered by phpBB