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 Post subject: Surpise stem weight
PostPosted: Fri Sep 28, 2012 4:08 pm 
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Joined: Mon Sep 03, 2012 3:41 pm
Posts: 27
Location: Noth London
I have started upgrading my Speciliazed Rockhopper Comp 2011.

I just picked up my 70mm X4 Thomson stem and 30.9mm Thomson Masterpiece Seatpost today from the shop.

Before I fitted them I did the obligatory weighing and the seatpost weight saving was as expected, OE post 315g, Thomson post 190g.

However, the surprise was the stem, the OE stem was 140g against the Thomson stem at 152g...........erm, a weight gain then ! lol

The OE Specialized stem did seem pretty thin and flimsy compared with the Thomson one though, so I am happy to have the new stronger Thomson stem on there now.

Has anyone else bought something expecting it to be lighter than the OE parts only to find its not ?

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Aim : to get a 12.2kg Rockhopper down in the 10's !!

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 Post subject: Re: Surpise stem weight
PostPosted: Fri Sep 28, 2012 4:19 pm 
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Joined: Mon Mar 02, 2009 4:50 am
Posts: 689
Yeah, Thomson stems are far from light. Also the only stem I've ever seen break.
I bought a carbon handlebar a while back that ended up only saving 2g..It was an expensive 2g!


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 Post subject: Re: Surpise stem weight
Posted: Fri Sep 28, 2012 4:19 pm 


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 Post subject: Re: Surpise stem weight
PostPosted: Fri Sep 28, 2012 6:59 pm 
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Joined: Fri Oct 07, 2011 2:08 pm
Posts: 1365
Thomson stems are fu%king heavy :thumbup:


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 Post subject: Re: Surpise stem weight
PostPosted: Fri Sep 28, 2012 7:11 pm 
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Joined: Thu Jan 13, 2011 4:04 pm
Posts: 511
Location: Sunny UK
not necessarily OEM but had bought a 2 speed BB30 FSA SLK chainset expecting it to be lighter than a 3 speed FSA K-force BB30 chainset which it ain't :(


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 Post subject: Re: Surpise stem weight
PostPosted: Sat Sep 29, 2012 1:15 pm 
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Joined: Wed Jan 18, 2012 4:23 pm
Posts: 470
Location: Midlands, United Kingdom
Some stems are unexpectedly light, the generic forged/CNC stem sold by superstar/bikehut and others is about 130g in 80mm length.

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 Post subject: Re: Surpise stem weight
PostPosted: Sat Sep 29, 2012 8:40 pm 
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Joined: Sun Aug 29, 2010 3:10 pm
Posts: 53
Location: Southeast England
I find Carbon products are worst for this.People tend to make the assumption that because it's Carbon fibre it's lighter than Aluminium or Magnesium alternatives,which in quite a suprising amount of cases is not the case always check the weights before hand.

Another thing people tend to do is assume Titanium is lighter than Aluminium because it's more expensive.

In your case I could definately deal with the slight increase knowing of a better quality part is fitted.


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 Post subject: Re: Surpise stem weight
PostPosted: Sun Sep 30, 2012 5:22 pm 
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Joined: Mon Sep 03, 2012 3:41 pm
Posts: 27
Location: Noth London
Yeh , when bashing through forest trails, its good to know there is a solid bike underneath you.

Hence why I don't mind a slight weight increase. I imagine when I upgrade the pedals to some decent flats, I will gain a bit of weight too. Doesn't bother me too much, biggest weight loss will be when I upgrade the rims and go tubeless which hopefully be early next year when fund allow.

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Aim : to get a 12.2kg Rockhopper down in the 10's !!

My sloooow weight loss project!


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 Post subject: Re: Surpise stem weight
PostPosted: Mon Oct 01, 2012 12:28 pm 
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Joined: Sun Aug 29, 2010 3:10 pm
Posts: 53
Location: Southeast England
As for Flats,I've been running these for a couple of years and for 300g they are pretty light too.

http://www.ebay.co.uk/itm/Wellgo-MG1-MG ... 2302f7a6f1


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 Post subject: Re: Surpise stem weight
PostPosted: Tue Oct 02, 2012 10:51 am 
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Joined: Mon Sep 03, 2012 3:41 pm
Posts: 27
Location: Noth London
Thanks Bradley, I will bear them in mind

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Aim : to get a 12.2kg Rockhopper down in the 10's !!

My sloooow weight loss project!


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 Post subject: Re: Surpise stem weight
Posted: Tue Oct 02, 2012 10:51 am 


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 Post subject: Re: Surpise stem weight
PostPosted: Wed Oct 03, 2012 8:49 pm 
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Joined: Mon Sep 03, 2012 3:41 pm
Posts: 27
Location: Noth London
Today I changed the red Enduro grips to black SIP grips and saved 10g........not bad for £14.50 and I have almost made back the 12g I gained with the thomson stem ! lol

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Aim : to get a 12.2kg Rockhopper down in the 10's !!

My sloooow weight loss project!


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