Thompson Elite "Tuned"

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rebizap

Post subject: Thompson Elite "Tuned"

Posted: Sat Apr 05, 2008 8:06 pm

Joined: Mon Nov 13, 2006 5:43 am
Posts: 140
Location: Seattle

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.

Attachments:

Thomson small.jpg [ 43.45 KiB | Viewed 6167 times ]

Thomson small2.jpg [ 49.13 KiB | Viewed 6026 times ]

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Nicola

Post subject:

Posted: Sat Apr 05, 2008 8:21 pm

Joined: Tue Dec 23, 2003 4:48 pm
Posts: 322
Location: Italy

nice works! I'm just planning to do the same with my Thomson seatpost....

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Frans

Post subject:

Posted: Sat Apr 05, 2008 8:34 pm

Joined: Wed Jan 25, 2006 8:32 pm
Posts: 527
Location: Bow of a Farr 40

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.

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rebizap

Post subject:

Posted: Sat Apr 05, 2008 8:47 pm

Joined: Mon Nov 13, 2006 5:43 am
Posts: 140
Location: Seattle

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.

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asphaltdude

Post subject:

Posted: Sat Apr 05, 2008 9:16 pm

Joined: Tue Aug 12, 2003 8:39 pm
Posts: 1214
Location: Holland

Replacing the upper part of the clamp by something like this:

could save even more weight....

_________________
Whow! That's a pretty damn nice garage door!

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rebizap

Post subject:

Posted: Sat Apr 05, 2008 9:30 pm

Joined: Mon Nov 13, 2006 5:43 am
Posts: 140
Location: Seattle

That is a good idea!
Are those parts alum?

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rebizap

Post subject:

Posted: Sat Apr 05, 2008 9:31 pm

Joined: Mon Nov 13, 2006 5:43 am
Posts: 140
Location: Seattle

oops....
Double post

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asphaltdude

Post subject:

Posted: Sat Apr 05, 2008 9:43 pm

Joined: Tue Aug 12, 2003 8:39 pm
Posts: 1214
Location: Holland

http://weightweenies.starbike.com/forum ... hp?t=14674

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

_________________
Whow! That's a pretty damn nice garage door!

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SL58

Post subject:

Posted: Sat Apr 05, 2008 11:29 pm

Joined: Tue Oct 30, 2007 5:02 pm
Posts: 642

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?

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bobbyOCR

Post subject:

Posted: Sun Apr 06, 2008 12:12 am

Joined: Sun Sep 03, 2006 1:55 pm
Posts: 2053
Location: Western Australia

His BB should be sealed, and if he isn't mountain biking, he should be fine anyway.

_________________
BMC SLC01

Visiting South West Australia? Visit Crank n' Cycles!

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SL58

Post subject:

Posted: Sun Apr 06, 2008 2:32 pm

Joined: Tue Oct 30, 2007 5:02 pm
Posts: 642

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.

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backon2wheels

Post subject:

Posted: Tue Apr 08, 2008 6:01 am

Joined: Tue Mar 18, 2008 3:02 am
Posts: 69

Give the guy any free time at all and parts start getting machined down.

nice effort bro.

Kyle.

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agent of Kharma

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MikesBike

Post subject:

Posted: Tue Apr 08, 2008 9:00 am

Joined: Wed Sep 01, 2004 10:48 am
Posts: 68

Or save time and buy the Thomson Masterpiece

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beatnik

Post subject:

Posted: Tue Apr 08, 2008 3:52 pm

Joined: Thu Aug 03, 2006 6:38 pm
Posts: 1227

Or save everything and keep the Elite reliability. You are crazy

_________________
Biomechanical spreadsheet. Sizing&Fitting.

http://weightweenies.starbike.com/forum ... 8e319d185b

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linus

Post subject:

Posted: Tue Apr 08, 2008 3:57 pm

Joined: Wed Apr 18, 2007 5:18 pm
Posts: 494
Location: Toronto, ON

beatnik wrote:

Or save everything and keep the Elite reliability. You are crazy

Welcome to WW my friend. :wink:

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