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Thompson Elite "Tuned"

Posted: Sat Apr 05, 2008 8:06 pm
by rebizap
Had some free time at work yesterday. So it was time to tinker...
Down to 158g from 198g
It is a 31.6, was 287mm long and is now 240mm.
The centers of the head have been milled out, the edges have been trimmed back and the top of the post has been milled down.
This weight is with tuned stock steel bolts and barrels.

Posted: Sat Apr 05, 2008 8:21 pm
by Nicola
nice works! I'm just planning to do the same with my Thomson seatpost....

Posted: Sat Apr 05, 2008 8:34 pm
by Frans
Good work, can you do mine please? :-)

I already filed away the fwd part of the lower saddle rail clamp since it was cause abrasion to my cycle shorts (my saddle is as far back as possible) but I never imagined how far you could take it.

I suppose cutting it to length was by far the biggest weight saver. I once tried cutting a 400mm 30.9 Thompson post and it was not easy, the alu was quite hard. Is that because it's 7000 series? Most cheaper alu posts are soft as hell.

Posted: Sat Apr 05, 2008 8:47 pm
by rebizap
Yes the 7000 series is pretty hard. But it does machine nice.
It doesnt seem to gaul up as much as softer alum.

The 45mm long piece of tube weighed out to 19g.
So there is about 15-20g from the head and bolts.
I think you take a little more off the head parts to get a few more grams but i figured this was enough for now.

Posted: Sat Apr 05, 2008 9:16 pm
by asphaltdude
Replacing the upper part of the clamp by something like this:

Image

could save even more weight....

Posted: Sat Apr 05, 2008 9:30 pm
by rebizap
That is a good idea!
Are those parts alum?

Posted: Sat Apr 05, 2008 9:31 pm
by rebizap
oops....
Double post

Posted: Sat Apr 05, 2008 9:43 pm
by asphaltdude
http://weightweenies.starbike.com/forum ... hp?t=14674

Topic about Felix0rs tuning job on a Easton EC90 post :thumbup:

Posted: Sat Apr 05, 2008 11:29 pm
by SL58
Asphaltdude,
I replaced clamp like that with Thomson upper plate and I think
Thomson is lighter and better (Ridley Helium ISP).

rebizap,
now you need to watch all the dirt from back wheel
getting thrown under a saddle and falling down right on the BB.
Piece of tape on the upper plate?

Posted: Sun Apr 06, 2008 12:12 am
by bobbyOCR
His BB should be sealed, and if he isn't mountain biking, he should be fine anyway.

Posted: Sun Apr 06, 2008 2:32 pm
by SL58
Here is Ti bolts and nuts for the post:

http://cgi.ebay.com/Thomson-Titanium-Se ... dZViewItem

Also the saddle cradle(lower part) can be made from ofcut from any carbon fork cut in half lengthwise.

Posted: Tue Apr 08, 2008 6:01 am
by backon2wheels
Give the guy any free time at all and parts start getting machined down.

nice effort bro.

Kyle.

Posted: Tue Apr 08, 2008 9:00 am
by MikesBike
Or save time and buy the Thomson Masterpiece :D

Posted: Tue Apr 08, 2008 3:52 pm
by beatnik
Or save everything and keep the Elite reliability. You are crazy ;) :lol:

Posted: Tue Apr 08, 2008 3:57 pm
by linus
beatnik wrote:Or save everything and keep the Elite reliability. You are crazy ;) :lol:


Welcome to WW my friend. :wink: :lol: