Profile DesignThreadless Converter (1-1/8-Inch)

I bought a second mountain bike with a newer styled rear suspension. I ended up swapping out all the good quality parts from my old bike to my new. For the most part with the exception of the front fork they were pretty close component wise. I had a Rock shock on my old bike with heavy duty springs and the on on my new bike had regular springs. I moved the rock shock over to the new bike and because the head tube was shorter had to cut it down. When I went to install the other fork, I found it was 1/2” too short on my older frame. I researched many different ways to get this fork to work but all were too expensive. This was after all my spare bike now. I couldn’t see letting it go to waste or throwing it away. I then found this stem on the interweb. I ended up ordering it and a few other parts that did not work. They will be going back. This works like a quill style stem. I found it would not fit in an 1-1/8 aluminum steerer tube but it went right into my steel steerer tube perfectly. Everything bolted together with this alone. I though I might have to buy a star nut to fit into this to load the steering bearings but it seems to have tightened up just fine. Now my steerer tube was only 1/2” short so this went in and seated with enough of the stem to hold tightly. You’re going to have to evaluate if it will work for you. I’m happy to have my 2nd bike back on the road.

Good product. Used a velo orange one before and I like this design better, as I can drop my stem lower without the taper and not have that awkward transition from the headset to stem. Just depends on what kind of bike you have.Some reviews have an issue regarding wrong size diameter, to clarify the diameter in the item name is for the outer diameter of the steerer tube, not the interior diameter (or what dia measurement when put a caliper on the old threaded stem). The Profile Designs webpage for this product makes this pretty clear so check that before orderingWould've loved it if they include some spacers in case I want to move my stem higher, oh well

古いマウンテンバイクのアヘッド化には重要なパーツ！黒もが有れば最高ですが。

I don't have any issue to the product except the printing of the label.. it was a little bit faded and the letters are not sharp.. and the courier who deliver the package didn't do their job properly! They delivered it to the wrong apartment building...

This is a nice-looking well-made adapter, if a bit heavy with the steel bolt - 164g of which 49g of it is just the bolt. The main body, wedge, and the top cap are all milled alloy.The step isn't 100% a 90-degree angle but a slight taper for strength but it shouldn't be an issue with spacers as it goes from one diameter to the next over only a millimeter or so.Just be sure you buy the correct one for your needs.The description says:*Steerer Clamp OD 25.4mm, for 1", 28.6mm for 1-1/8*Quill Insertion Diameter: 25.4mm for 1 1/8" stems and 22.2 for 1" stemsThey are actually talking about TWO DIFFERENT SIZES here. You need to look below and see it says "Item Specifications - Stem Size = 1-1/8"That means that THIS stem adapter is 1-1/8 to 1-1/8 threaded to threadless - 24.5mm quill -> 28.6mm stem.The other type will say 1" to 1" threaded to threadless - 22.2mm ->24.5 stem, and that listing is elsewhere on Amazon. The listings are identical except for that little spot on the bottom where it says "Stem size = 1-1/8 -OR- Stem size =1" The two listings are separate and look nearly identical. Amazon should combine them and add a size choice to make this more clear.Amazon doesn't have a listing for a 22.2mm -> 28.6mm by Profile Design. Perhaps they don't make one. There is an Origin8 version that does this if that is what you want. Threadless stems in 24.5 are sort of rare/obsolete so if you want to go from a 1" threaded steerer and use a modern 28.6mm threadless stem you can't use either of these.Watch what you are buying here as the description is a little confusing.4-stars for being a bit heavy. A lighter bolt would help a lot but drive up the price I suppose