Profile Design Threadless Size Converter (1" - 1 1/8")

I'm currently in the process of building a trike out of a very old (somewhere between the 50's and 80's, I've yet to find anything on the serial number) Schwinn (at least, I THINK it's a Schwinn, lol) that had some very old tech on it. Such as a threaded headset and the old cup and ball style bottom bracket...lol, yeah, that old. So I already got myself a bottom bracket converter so I can run a normal threaded bottom bracket cartridge (which sure makes maintenance a breeze), but I was on the hunt for a front fork to replace the stock fork, as I was converting it from a 24" skinny tire trike to a 20" FAT TIRE trike (lol) and wasn't sure what I was going to have to get, stem-wise, until I found a fork. Well, I finally found myself a front suspension for a 20" x 4" fat tire (already have all 3 rims, thankfully), and since it had a 1" threadless tube, I knew I needed an adapter for the fork...which leads me to this, lol. This works in my new suspension fork beautifully! I still have to get replacement cups and bearings for the headset, as there's no way I'm re-using the old cups and bearings. I saw quite a few bearing indentations from years of riding a rigid-forked bike and smacking pot holes and curbs and whatnot. In fact, a little PRO TIP for the day is to always run a suspension fork of some kind if your bike allows for it...it not only saves wear and tear on your wrists, elbows, and shoulders, but a front suspension fork, no matter what kind, can prevent impact damage to your headset bearing and cups...the suspension absorbs energy that would otherwise be transferred to the bearings and cups, causing indents and thus irreparable damage to the bearing surface. Anyway, I have to pick up new bearings, so I don't have this installed yet, but when I do, I'll upload a pic with the new fork / wheel / tire installed on the old frame. But as I said, it works great for my application. If you're converting an old threaded trike to a threadless setup like mine, this should work GREAT for you. 5 stars.

Likes: Fits my bike project like a glove. solid material very durable amazing workmanship Concerns: None Kept or Returned? Kept and installed on my Fixie bike and it works like a charm. Thanks for your time and I hope this review was helpful.

Perfect fit for what I would assume most standard tube size. Plenty of room for height adjustments for anyone wanting a more upright feel. Mine is set to the lowest possible setting with a little bit of it still exposed. Which is fine since it looks pretty damn sexy. Could not imagine this thing failing at any point due to its solid build. I love that it has a brand on the top rather than creating a gaping hole in your stem. This stem went onto a 2019 retrospec harper bike. For anyone trying to fit this on that frame, don't stress, it fits like butter baby!!!

I purchased this to update a mid 90's Cannondale M400 mountain bike. The stem fit into the head tube fine, but initially I was completely unable to get things tight -- the bolt just turned, and there was never any real tension. Upon further inspection I noticed that the included bolt is shorter than the one that came stock on the bike, and also that the little wedge piece at the bottom that expands to tighten the stem is smooth (pictured), whereas the one that came stock on my bike has ridges. I figured I would try to use the old bolt and wedge, and that surprisingly solved the problem. I've been on multiple rides and nothing is loose, so far. This could be an error on my part in terms of not ordering the right product, or in not knowing enough about my own bike, but the bottom line is that this didn't work for me out of the box. If I didn't think to mix in the old parts with the new I would have had to return this. I'm not entirely sure what sort of bike this does work for out of the box, but if you have an older Cannondale I wouldn't recommend ordering this unless you have the original parts to swap in. I would have spent more for a product made in the US, but as far as function and value for money it is hard to complain here.

I bought an early 90's vintage very high-end steel bike frame. Turns out it is getting pretty difficult to find stems and handlebars in the 'old' specifications, without spending a ton of money. So, this riser allowed me to not only easily set up my bike, but use a modern handlebar & stem. So, very economical solution. Not too much heavier than traditional components, because I could use a much lighter modern handlebar. Not quite as sleek looking as traditional components, but quite acceptable.

Good quality.

Praktisch aber an meinem Fahrrad musste ich eine Anpassunh vornehmen!

It is 1"(25.4mm) -1/8 on the packaging but actual item inside is 22.2 diameter. What I needed is bigger diameter not this one that I received☹️☹️☹️

Item received as described. Very happy with it. Good quality and looks great. Packaged very securely. Would recommend and buy again.

VERY GOOD AND WOULD HAVE USED IT BUT FOUND ONE IN MY GARAGE AMONG MY "BITS" SO HAVE RETURNED IT IN EXCHANGE FOR MUCOFF 5LTR. HANKS FOR YOUR HELP