Old 06-23-12 | 08:58 PM
  #1  
filthyd
Newbie
 
Joined: Jun 2012
Posts: 2
Likes: 0
First time builder: geometry help please!

Hey guys,

I'm planning to solder my first frame in the coming months. I have been reading extensively about it and have purchased a few good how-to books for noobies. I'm currently completing my CAD mockup for the roadbike I'd like to build but have some questions that I figured someone on the forum might be able to answer.

A few quick notes about the bike in the works:
-I'm building with lugs and will be silver soldering, so I have relatively fixed joint angles.
-I'm going to be using Llewellyn's Manorina lugset that allows for a 6* TT slope.
-I have weird proportions, with very long legs and a relatively short torso that necessitates a top tube of about 53-54 cm (depending on ST*).

So here goes:

1. Is it unreasonable to think that I can bend lugs to accommodate angles that are less than 1 degree off? For example: I need a lower HT lug with a 59.1 degree angle--it will come as purchased with a 60 degree angle.

2. The current front-center distance is 56.54 cm. This feels a bit low to me, as it seems that most road frames have around 58+ cm. Should I be concerned about this? Will the frame be unrideable with that little front-center? A little toe overlap is okay with me.

I have posted two images of the geometry sheet for the bike to be built and would love any geo input, especially regarding the two questions above.

GEOMETRY:
https://picasaweb.google.com/1096776...ewBikeGeometry

Thanks so much!

Darius
SF Bay, California

Last edited by unterhausen; 06-24-12 at 06:06 AM.
filthyd is offline  
Reply