Talk to me about stiffening up a flexy steerer tube
Moderator: robbosmans
Visit starbike.com Online Retailer for HighEnd cycling components
Great Prices ✓ Broad Selection ✓ Worldwide Delivery ✓
www.starbike.com
@Privateer: out of curiousity, what carbon steerer did you find flexy and what did you replace it with (and find stiffer)?
-
- Posts: 65
- Joined: Fri Dec 30, 2011 10:02 pm
The fork is stock on my Museeuw MC-2 (http://en.museeuw.com/bikes/race/mc-2). I'm not saying the "test" I did was scientific in any way. I can't imagine what kind of situation I would find myself in where the front wheel is trapped in place and I needed to twist the bars. I've also noticed bar movement when I get out of the saddle on the trainer, so something is flexing. The fork legs may be the more likely culprit. In any event, I can only report that when I perform the same "tests" on my MC-2 and my Team Carbon, there is less movement with the latter.
__________
Seven 622 SLX
Colnago C50 Extreme Power
Zanconato CX
Seven 622 SLX
Colnago C50 Extreme Power
Zanconato CX
Given that the diameter of the legs is much larger than the steerer, I don't see why some people think it must be the fork legs. I once swapped a cheap Trek carbon fork with an alloy steerer for a Look full carbon fork and there was a massive difference in stiffness that I think was definitely attributable to the steerer tube change. Not that this helps you do anything about it of course, other than removing spacers and /or changing the fork.
-
- Posts: 1163
- Joined: Sun May 16, 2010 7:28 pm
Whether its the fork blades or the steerer, what does it matter? The fork itself is still flexy. It could be the headtube too, but the bottom line is that the frame or fork has to be swapped.
In the Olde Days race mechanics would drive a broomstick down the steerer tubes of bikes to be ridden in Paris-Roubaix to reduce steerer breakage.
You could expoxy an appropriate sized carbon or aluminium tube in there, as was suggested above.
You could expoxy an appropriate sized carbon or aluminium tube in there, as was suggested above.
-
- Posts: 65
- Joined: Fri Dec 30, 2011 10:02 pm
All interesting ideas, but none seem (a) worthwhile or (b) appropriately WW. I think I'll live with it and take this as a license to ditch my bulky compression plug in favor of something lightweight.
__________
Seven 622 SLX
Colnago C50 Extreme Power
Zanconato CX
Seven 622 SLX
Colnago C50 Extreme Power
Zanconato CX
Two facts:dwaharvey wrote: ↑Fri Mar 22, 2013 5:33 pmGiven that the diameter of the legs is much larger than the steerer, I don't see why some people think it must be the fork legs. I once swapped a cheap Trek carbon fork with an alloy steerer for a Look full carbon fork and there was a massive difference in stiffness that I think was definitely attributable to the steerer tube change. Not that this helps you do anything about it of course, other than removing spacers and /or changing the fork.
1, shape. Blade shape is less stiff than round laterally.
2, tube thickness. Steerer tube is usually much thicker than a rim brake fork.
-
- Posts: 780
- Joined: Thu May 07, 2015 9:18 pm
Basic loading on the steerer is mostly twisting in the example given. Tubes are buggers to twist.
The fork legs are bending. Much easier to do that.
The fork legs are bending. Much easier to do that.
https://www.intend-bc.com/products/headset/stiffmaster/
Problem solved.
Problem solved.
Ride fast Take chances
Visit starbike.com Online Retailer for HighEnd cycling components
Great Prices ✓ Broad Selection ✓ Worldwide Delivery ✓
www.starbike.com
-
- Posts: 189
- Joined: Fri Jul 28, 2006 8:28 pm
- Location: the Netherlands
If it really is the steerer tube flexing, then this might be helpful: https://www.intend-bc.com/products/headset/stiffmaster/
Cheers, Lars
Cheers, Lars