|Problems wih Reynolds Ouzo Pro||bp|
Jan 24, 2002 11:15 PM
|I've been using a Ouzo Pro for about a year now, and have had nothing but problems to maintain headset tension. The problem seems to be that the expander bolt (with a dicky little O-ring) simply doesn't get enough grip on the inside of the steerer tube to stop it slipping and losing tension. I'm on the second expander bolt with no improvement. The problems is that I must use Reynolds expander bolts (or so it seems) because the steerer tube inside diameter is not standard.
Has anyone got any suggestions how I can improve this.
Thanks for your help
|your problem is probably not the expander bolt...||DrD|
Jan 25, 2002 4:14 AM
|The expansion wedge/bolt thingy is used to pre-load the bearings and that's it - it is not designed to hold everything together while riding - the idea with a threadless setup is to preload the bearings with the expander wedge or bolt/nut combo, then clamp the stem down on the steerer to hold everything in place - if you can never get the bearings adjusted properly on the stand, then the expansion wedge is the problem - if, on the other hand, the headset keeps coming loose after a little riding, then the stem is slipping - you need to clamp it down tighter (assuming it's not defective)|
Jan 25, 2002 10:54 AM
|Expander bolt allows you to get the compression on the stack, but the stem does all the work of holding everything in place. I had similar problems until I cranked the stem bolts. It's one of the reasons I prefer the Ritchey WCS - it has two clamping bolts and once set correctly nothing moves. You may actually strip some other clamping bolts before you get enough tension. I'd also make darn sure that there isn't a film of grease on either the inside or outside of the carbon steerer. Don't just wipe with a rag (to make a thinner film) - use some citrus based degreaser that will remove any contaminates. You can then put a dab of grease just on the bolt threads.|
Jan 25, 2002 7:30 PM
|I've also found that a very careful cleaning with rubbing alcohol is needed before final assembly. That carbon stuff is naturally slippery and any grease or oil will make it nearly impossible for the stem to not slip.
Jan 28, 2002 7:24 AM
|I have the same problem- but I know it's the stem causing it. I'm terrified of stripping out my ITM "The Stem", so I won't torque the bolts above the recommendation, but it is loose enough that I have to re adjust the headset about once a week.
A small price for such a cool stem...
|Oh, just get yourself a torque wrench man!!||Bikeman|
Jan 28, 2002 7:12 PM
|I have the exact same stem and was worried about it too. But do yourself a favour and buy a $30 item which may save your $200 piece of metal. It will take the guess work out of it. The recommended torque is 6Nm, which I might add is pretty tight. If it has been loosening every week, you are no where near 6Nm! |
Prior to buying it for myself, I only had it the bolts done up to about 2Nm. If yours is slipping, just tighten the bolts a bit more.
You can use it on all the other parts too!
P.S: Imagine if your stem loosens whilst your screaming down a hill at 50 miles an hour? You'd die man! So this thing could save your life - it's an investment. (And no I'm not the sales representative of Park Tools!)
|Oh, just get yourself a torque wrench man!!||TJeanloz|
Jan 29, 2002 11:11 AM
|I'm probably the biggest advocate of using a torque wrench. I have the bolts torqued to 6Nm and there is still some slippage- and I'm deathly afraid to go over 6Nm.|
|6Nm is not that much. I use...||PsyDoc|
Jan 30, 2002 10:53 AM
|...78 inch pounds or 8.8Nm on the 2 Steerer Clamp Bolts. For the 4 Bar Clamp Bolts, I also use 78 inch pounds or 8.8Nm. Both of these settings are not outside the max torque setting listed on the stem. I have no problems with slippage. Also, I called Ritchey and they recommend that you tighten the top two bar clamp bolts until the faceplate almost touches the stem. Then, torque down the bottom bolts.|
|re: Problems wih Reynolds Ouzo Pro||curlybike|
Jan 26, 2002 4:51 PM
|What stem are you using? If the stem is a Deda Zero with one pinch bolt, it will never stop moving. If the bottom of the stem is not absolutely perpedicular to the axis, same thing.|
|If the stem is a Deda Zero with the pinch bolt,||TJeanloz|
Jan 28, 2002 7:22 AM
|You have voided your warranty. That stem is very, very bad for CF steerer tubes.|
|Have you checked to see...||PsyDoc|
Jan 28, 2002 9:43 AM
|...that there is enough space 2-3mm between the top of the stem and the top of the carbon fiber steerer tube? My bike would go out of adjustment every few rides. When I looked closely, the shop that cut the steerer tube did not cut it straight and there was more steerer tube sticking up on one side of the stem compared to the other. So, I simply took some 220 grit sand paper wrapped around a flat edge and smoothed that section down. I have not had a problem since.|| |