THOMSONX4 31.8 Bicycle Stem

The Thomson reputation is well known and in this case it continues. The stem is perfect for my mountain bike. Not sure what to say, it is well-made, nicely finished and strong. It should last longer than my new bike.

Was looking for a shorter stem for my Cannondale Jekyll with 1.5 inch steerer tube. This is hard to find as most bikes are 1.25 inch. This fit perfectly and really changed the feel of my bike. I feel more stable on decents and steering is more responsive than with the stock stem. A shorter stem is a great way, relatively inexpensive way to change the ride characteristics of your bike. It also looks a lot better now too.Beware you may need to buy additional spacers to make this stem fit on your bike. Locating spacers was difficult but I found some Straightline spacers on CRC that fit perfectly.

I am using the X4 on a road bike although it's marketed as a mountain bike item. As such, there is about a 50 gram weight penalty over say a Ritchey or a 3T road stem. Thomson's X2, the road-specific stem, competes in weight but I can't recommend it due to flex and the clamp having only two bolts. Headscratcher there...the X2 is Thomson's only mediocre product. The X4 benefit however is vastly superior stiffness - noticeable immediately and, the large clamp in my logic will be inherently kinder to finicky carbon handlebars. A stem review by Fairwheel Bikes a few years ago actually measured "compliance" i.e., flex under a twist load as in riding. Out of a bunch of carbon and alloy stems, the Thomson X4 took second overall being bested only slightly the Shimano Pro Vibe sprint version seen on Cavendish's rig and Theo Bos's Keirin bikes. The Thomsons are the best made stems and seat posts available in my opinion. The machining is exquisite and the overall quality is without equal. I can also validate Thomson's claim as to their seat post clamp being superior. That thing is the best way to NOT crack your $160 carbon post as it holds securely at 2.8 Nm. (BTW, get yourself a REAL torque wrench - not the "clicker." I learned that after cracking two of them...ouch.)

What can you say about Thomson products? These are works of art and are bomb proof. When your life depends upon the quality of the components, why use anything but the best.

Strong and reliable are the words to use when thinking about this stem. I have Thomson stems on all of my bikes, because they look good, are superbly made and are stronger than anything you can throw at it. I have never had an issue with the Thomson stems I own, they are truly set it and forget it bike parts. Just make sure you use a torque wrench when installing. 5NM is not a lot of torque, but some people might crank the bolts down and they do break pretty easily when over torqued.

Looks great, works great, light enough.

I am a sucker for nice machining on bike parts. This is by far my favorite bike component on there right now. In typical Thomson fashion, it is beautifully machined and appears to be very high quality. It uses very low torque (like their seatpost clamp), is solid, and doesn't make a noise. I have been riding it for the last 3.5 months and still love it. I actually like it more than the Straitline SSC I had on my last bike - these bolts require FAR less torque and I am really digging the understated looks here. All around, this thing honestly screams quality.

It seems all my bikes will have a Thomson stem - I don't see buying anything else - they just work well.I'm a big guy and need parts to hold up and last - these do.Machined aluminum work of functional art.

Great product .Second stem from Thompson.Light strong a looks amazing!

Great stem, crappy steel bolts.Five stars for stem, One star for the bolts.I found the new Thomson bolts a much softer steel than my old Thomson Elite 25.4mm stem. The bolts are very prone to rounding out while torquing to spec (48 in/lbs) ... Note: I use only top quality, non-worn Allen, Knippix, Snapon, Mactool, etc. tools including an old bar-style non-click torque wrench. I immediately replaced the Thomson stock bolts with M5 18mm titanium bolts which worked great.Link to the To Bolts I used (color: black): https://www.amazon.com/gp/aw/d/B01G6ZXEWS?psc=1&ref=yo_pop_mb_yo_pop_mb_pd_t2Note: Ensure you grease the Ti bolt threads with a non-conductive grease or the bolts may galvanically weld to the aluminum stem over time

Lassé par la recrudescence des potences noires, j'ai voulu opter pour du silver. Plus classique dans l'esprit mais finalement beaucoup moins répandu... Choix tout aussi "classique" acheter la référence : Thomson. Les produits sont usinées aux USA et la qualité est toujours au rendez-vous.L'aspect iridescent sous le soleil est du plus bel effet. les photos ne rendent pas compte du beau rendu chromé.A acheter les yeux fermés si vous êtes fan de tuning vélo ou juste à la recherche de l'excellence à prix correct.Seul bémol, les vis zinguées... vite changées pour des vis titane du plus bel effet !

nobel-vorbau zu fairem preis. steif, edel und schön.sieht an meinem bike (nicolai helius cc) richtig gut aus.nur zu empfehlen.

写真はオーバーサイズなのにワンポイントファイブ。45mm(o.p.f)って分かりにくい表記ステム長()の表記じゃ気付きにくいし、素人に優しくない。写真は50mmのものですとしか商品説明にないのに写真をオーバーサイズ使う性格の悪さ。不良在庫をていのいいように捌こうとしてる悪質さが見える