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Discussion Starter #1
Hi all

I bought and installed this stem 2 years ago and the bike is rarely used. The bike is only for commuter ride for less than 30 times ever since.

Last week, I found huge crack on the stem. Mailed thomson, but no reply.

I lived overseas, the nearest distributor is in Singapore, but no email address (have someone over there to help me out with the claim, but still hoping for the result)

Today, I search 'cracked thomson stem', and surprised with the result. How can someone claims the strongest built in the world with such poor product and service?

Search for warranty information, but couldn't find it, anyone can direct me to it?

Thanks all
 

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That be a picture of someones stem that does not own a torque wrench (or if they own one, they sure as heck didnt use it properly......)

Thomson is awesome to deal with - I have never had a warranty issue on any of their product, but have talked w them on a few topics.

Best bet is to call them.

number can be foundon their website:

www.lhthomson.com

They will sort you out.
 

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since 4/10/2009
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006_007 said:
That be a picture of someones stem that does not own a torque wrench (or if they own one, they sure as heck didnt use it properly......)
Yeah, I was thinking that crack looked like it happened due to over-torquing the bolts. I'd replace the handlebar, too, because it could also be compromised.
 

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I live to bike
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I'll agree with the others that it looks like the crack may be due to improper installation rather than a defect.

But call Thomson. Since it's only a faceplate, I wouldn't be surprised they'd send you a new faceplate free of charge.

And I second the idea of taking a careful look at the handlebar after removing the faceplate. It may very well be compromised, too.
 

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I cracked two of the face plates, on the third one now. Thompson gave me a new one after emailing them and sending the cracked one back. I used a torque wrench the second time, it still cracked when using the cross pattern to tighten. Made three passes, gradually tightening the bolt in the cross pattern. It seems like it's a matter of when, not if.

Make sure you have equal gaps at the bottom and top after tightening the plate.

I'm not buying another Thompson. Sure it's a good looking CNC machined piece, but that's about all it has going for it.
 

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Fo' Bidniz in da haus
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rallyraid said:
I cracked two of the face plates, on the third one now. Thompson gave me a new one after emailing them and sending the cracked one back. I used a torque wrench the second time, it still cracked when using the cross pattern to tighten. Made three passes, gradually tightening the bolt in the cross pattern. It seems like it's a matter of when, not if.

Make sure you have equal gaps at the bottom and top after tightening the plate.

I'm not buying another Thompson. Sure it's a good looking CNC machined piece, but that's about all it has going for it.
i too have had issues with Thomson. they have done a great job of marketing themselves somehow as "the" stem and post, i dont buy it.

overtorqueing? are you effing kidding me? so if it is overtorqued, it sure as hell shouldnt crack...it should be, well....overtorqued, and thats it. Overrated IMHO

I also challenge any of the MTBRetards to prove that Thomson is in fact the so-called, "best". I assure you there is no data on file to support Thomson, or any stem (or post) for that matter, being the best. This whole MTBR notion of Thomson being the best is based on years of cutting and pasting of the same cliches over and over...
 

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I'm a huge fan of sexy cncd parts, but I have no dilutions about it bing stronger for a given weight than a forged part.

That face plate does look to be installed incorectly though, I don't see any gap between the stem and the faceplate.
 

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if theres two parts on my bike that i absolutely never worry about, its the stem and seat post. neither are thompson. i dont get the draw, both are very low failure rate items from all the brands.
 

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Ummm...if overtorqueing was the culprit, then shouldn't the handlebar have cracked first?? I would certainly hope that my stem would be stronger than my bars! I use RaceFace Atlas and Bontranger stems and never had a prob.
 

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JayTee said:
Ummm...if overtorqueing was the culprit, then shouldn't the handlebar have cracked first??
Not necessarily. Though I have seen someone actually crush the bar at the clamp. The bar actually had a bulge in it where it had been squeezed into the cavity of the stem. (wasn't a Thomson stem - was on a bmx bike).
 

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I'm SUCH a square....
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Never used a Thom....never could justify the price. I will not spend $80 on a stem when I can get a good-looking, rock-solid, gorilla-strong stem for half that.

Heard the stories for years...wonder why they still make 'em.
 

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bigpedaler said:
...wonder why they still make 'em.
Dude, bling is bling. Most the LBS would go out of business if no one upgraded. Any trail bike would function fine with SLX and easton EA50 stuff but our econony would suffer :eek:
 

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I was going to put a Thompson stem on my mountain bike as an upgrade but my lbs told me that the faceplate crack quite often, so I went with RaceFace instead. If you have to buy a new faceplate, why not get a safer stem instead.
 

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Funny that this thread came up......One of my riding buddies cracked the faceplate of his Thomson stem the other day and I couldn't believe it. I guess is not that uncommon.
 

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I've cracked a thomson on both my road bike and mountain bike. And I DO use a torque wrench. They sent me a new faceplate for my mtb but would not for my road bike. I love their seatposts but will NEVER buy another stem from them.

I was told that it was my fault that it cracked. Sharp edges on a machined part = cracks. I'll go for forged from now on. There is a reason that most online stores stock Thomson faceplates...
 

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Agreed with Fo here. The usual defense is "overtorqued faceplate", but if that's really a huge problem, then cheap forged stems should be cracking left right and centre. The vast majority of riders don't use torque wrenches, yet stem failure seems to be a fairly rare occurrence across stems as a whole. The very fact that replacement faceplates are available for this stem should be warning enough.

CNC just isn't a good idea for bike parts that need to be strong. I went off the idea of CNC stems when my metalluragist buddy found a crack across his Thompson faceplace. Sure, he doesn't use a torque wrench, but he's not stupid about how he treats metals either. On the other hand, I've been riding for years with forged stems with the nuts cranked down about as hard as possible with no problems.
 

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womble said:
CNC just isn't a good idea for bike parts that need to be strong.

I don't get how a part made from a single piece of metal wouldn't be stronger than something with welds. But I'm not a metallurgist.

I have seen the machines Thomson uses to test their wares against the competition, though. The failure point for one of their stems does come long after anything I have seen them test from a competitor.

As for the face plate, those pictures show that little care was used in balancing the tightness of the bolts. It really isn't hard to do and once set up is pretty bomb proof.
 

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tomsmoto said:
if theres two parts on my bike that i absolutely never worry about, its the stem and seat post. neither are thompson. i dont get the draw, both are very low failure rate items from all the brands.
Exactly:thumbsup:
 
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