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threadless spacer stack(5 posts)

threadless spacer stackGoel
Feb 21, 2002 8:09 PM
I am going threadless. I am useing a King 1 inch head seat a WCS bar and stem and a Look fork with a alloy steerer what is the max spacer height? At what point does flex become an issue? how much is to much fred wise? My frame is a bit small so I am going to need a few.
re: threadless spacer stackpa rider
Feb 22, 2002 2:59 AM
The question is a good one, but doesn't give meaning to the problem.

What I mean is bike fit should matter not how it looks. I've seen guys have 6 spacers when their riding a smaller frame. I'm not sure what everybody means by "flex". My old 1 inch standand stem bike bars flexed alot when I stood, but I lived with it.

I would say 1 to 3 spacers is prefered, but if you can't get a stem to put your bar where you want it, then you have to use as many spacers to get you their. I would put as many spaces you need to put bar in the length and rise you want.

Lets say for example 6 spacers and zero degree 110 length stem. If you can find somebody who can give a different rise and will put you bar in same position then go for it. I have a 40 degree rise on my bike 150 length stem.

I need a bigger head tube on my frame, so this ws my only option. I have three spaces, but only one is under the stem. I could probably go without spaces if I want.

Sorry if this post sounds confusing, but the only option you have is spacers, or new stem, or get a bigger frame. I would work with my local LBS to see what stems they can get for me. My LBS has a catalog for bike parts and got some after market company for me when I bought my bike last year.

Good luck. I may have to do the same thing next bike I buy in two years.
re: threadless spacer stacktarwheel
Feb 22, 2002 5:18 AM
The big concern with spacers arises if you have a fork with a carbon steer tube, and then you only want a couple cm's at most. With an alloy steerer, you can get away with a lot more spacers, and I've been told it doesn't matter how high you stack them if you have a steel steerer. Personally, I would go with a postive rise stem and minimize the amount of spacers. I didn't use to like the look of riser stems, but now I've made peace with them. Don't cut the steer tube until you are absolutely certain you've got the rise you need -- or you'll end up with bars too low or having to buy a new fork.

I wouldn't worry about the Fred stuff. It's much more important getting a good fit. I developed all sorts of problems (numb hands, sore neck) from handlebars that were too low, which didn't clear up until I raised my bars about 1" below the height of the saddle. Consequently, I now have a lot of spacers AND a riser stem. I am much more comfortable now and could care less what anyone else thinks. I go on a lot of group rides with guys running low handlebars and they NEVER ride in their drops because it's just too uncomfortable. However, I can ride in my drops quite comfortably for long periods, and can ride on my hoods without having to crane my neck at a bad angle. Numbness in my hands has gone away.
The first thing I would doSpoke Wrench
Feb 22, 2002 5:43 AM
would be to examine the box that the fork was shipped in. You may find instructions which specify maximum spacer height. You may also find a longer hex nut you will need to install your front brake.

I'm always a little amused whenever I hear bicycle people talk about "stiffness." What you feel at the handlebars is going to be the sum of all of the slop in your entire front end. You have a pneumatic tire, a wire wheel, hub and headset bearings that are adjusted by "feel" and a lightweight carbon or aluminum handlebar tube that is lots longer than your unsupported steer tube. How can you isolate the flex caused by a spacer stack?
re: threadless spacer stackChen2
Feb 22, 2002 9:27 AM
Just upgraded my OCLV with an Ouzo Pro (all carbon) fork, and Easton EC 90 stem. The LBS mechanic put 3 1/2cm of carbon spacers on the 1" carbon steerer. I tried it that way expecting to feel some flex, but to me it seemed real solid. I should add that I'm a 165# weakling and I don't stress a bike much. I did have it dropped to 3cm though. The -10 stem makes a slight rise to the bar. This puts me more than 3" below the saddle, now I'm worried about neck problems, but ok so far.