Rigid segmented fork for frame 13

This is my 6th or so segmented MTB fork (?)…I lost track and don’t care enough to go back into the archives. But each time it gets easier as the process is somewhat further lodged into my brain, a little more each time.  I tend to up the ante a lil bit each time so not to do the same thing exactly, as well as do it the right and most efficient way as much as I can. That just means, instead of filing to get a pointed tip on the fork’s sleeves I used the mill this time and figured out a cool way to make a double-point/heart-shaped sleeve and i dig it!

The fork will be a suspension adjusted 29er at 468 axle to crown. The sleeves are 1.125″ x 0.058″ and the legs are 1″ x 0.035″. The small crown pieces are 1.125″ x 0.049″. It is definitely going to be a beefy fork but strong like bull.  The dropouts are from Ceeway over the pond with the 25.4mm plug for the 1″ legs. The steerer is the True Temper standard 1.125″ steerer (not the OX Plat version). These forks take lots of time with the addition of the sleeves since it’s just a lot of brazing added in (and the cleanup from the brazing).  I can see why not many builders build segmented forks…i doubt the ones that do make much of a profit.

Anyways….

In BikeCAD i messed with the geometry of this frame to make it be 70.5/72.5 with the rigid fork and 70/72 with the suspension fork and a bit higher BB height (12.3″ vs 12.2″) — because of the longer axle to crown of the suspension fork. That’s with 20mm of sag incorporated like usual. With the rigid it’ll have 82mm of trail and a front center of 675mm (46mm offset built into the fork), and with the suspension fork it’ll go down to 80mm and the front center will go up to 683mm.  So it’s definitely more of a cross-country racing and touring bike than a bike made for going downhill. I wanted to get a shorter front center for this bike when rigid to see how I liked it.  I’m 6ft. 2″ tall but all torso so I don’t want to go too short in the front center.

I forgot to mention in the last post — The chainstays ended up being around 433mm (17″). This was the shortest chain length i could get with the 38/16 gear.  The frame was made with the sliders set fully forward and the effective CS length like that was 423mm (16.6″).  Still lots of room to slide around. The sliders are about halfway through their slide-ability in this gear.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

%d bloggers like this: