You can measure your for steerer tube with a ruler, but I would bet a ham sandwich (with cheese and mustard) that it's a 1 1/8. Other sizes are FAR less common except some oversized steerers on high-end MTBs, etc.
Seriously, though.. just use a ruler to confirm.
Then, knock yourself out looking for the size and color you want online. At any given time there are thousands of stems on eBay.
just pokin' along
1. Yes, it's a 1-1/8" steerer. Most bikes use this standard. Wide choice of stems.
2. There's a huge difference between an 8cm stem and a 10cm stem. If one fits, the other will probably hurt. Don't guess.
3. You need to consider the rise angle as well. There's a very noticeable difference between a 6 degree rise 8cm stem and a 10 degree rise 8cm stem. One, the will be different effective lengths. Two, they will offer different ranges of fit. Again, know what you need. Many stems have their lengths and rise angles imprinted on them in a discreet or less than obvious location. Have you checked?
4. The guidelines in your first post are fine, but they leave out another matter of consideration: Stack height. This is the distance the stem occupies on the steerer tube, and it varies between mfrs. I've personally had stems with 35, 37 & 40mm stack heights; there are pprobably more than that. If your replacement stem has a different stack height than your original, you'll likely need to change out spacers or add some thin 1mm or 0.5mm shims. Otherwise, you may not be able to preload your headset properly.
5. Color is secondary.
6. Your source where you obtained your current broken stem should be a good source for the replacement.
You also have the option of a stem riser, then clamp your new stem onto It.
Those angle adjustable stems also get closer as you tilt them Up..
If you can get it down to a Bike Shop, you can test fit a bunch of choices
on and test ride it a bit.
open face threadless stems are a snap to swap out.
store inventory is easily augmented by their order book..
thank you guys !
i ended up getting this
i received and mounted it, however the spacer i have under (about 5mm) now must be changed to 3mm
that means that right now the 'top cap' is fitted, but it's 2mm higher than it was (screw less in? but thigtened, not too much)
can i bike safe even with this situation ?
I let the dogs out
As long as you don't have a carbon fiber steerer tube, you're fine. Also, that looks like an awful short (60mm at largest) stem. It probably isn't very comfortable.
Originally Posted by Andrew R Stewart
But it's red, and that's the most important thing.
just pokin' along
You need a bit of space between the top of the steerer tube and the top of the stem in order to preload the headset bearings. The amount of space varies somewhat to opinion, but 3-6mm is a workable range.
But, you don't want too much space! Too much space could result in excess compression of the stem around the end of the steerer tube as well as less interface.
A general guideline would be to manage your "stack" so that the upper edge of the stem's upper pinch bolt is at or below the top edge of the steerer tube when the stack is under compression. To check yours, you can:
1. Adjust your headset as is. Preload the bearings and tighten the pinch bolts. The headset components are now under compression.
2. Loosen and remove the cap only.
3. View the space between steerer and stem top. View the location of the upper pinch bolt in relation to top edge of steerer.
I'm not there, so can't comment on "safety" of your proposal.
Last edited by desertdork; 06-26-12 at 11:16 AM.