14
votes
PRO LT Handlebar Stem asks to tighten top handlebar screws first before bottom screws? Conflicting manual instructions?
Here are a few diagrams I drew in Autodesk Fusion 360 to explain how these zero-gap stems work.
According to the instructions provided with the few zero-gap stems I've encountered, you should tighten ...
- 15.5k
10
votes
Suggestions for protecting jeans from saddle clamp bolt
I would suggest cutting off the extra threads. If you have access to a Dremel or similar tool it wouldn't be too difficult. Doing it with a hacksaw could be a real pain. Alternatively you could check ...
- 18.4k
9
votes
Accepted
What saddle rail clamp should I get?
Those style of saddle clamp only slip like you described if they’re loose. Make sure you tighten the side bolts really good (it’s hard to break those things) and use threadlocker.
A better option is ...
- 15.5k
7
votes
Brake hanger causing seatpost slippage?
2.8Nm for a collar on a steel/aluminum post is incredibly small. My carbon frame bike (with aluminum seatpost) specifies 5nm and 5-7 is a common value (Refer park tool website). I probably run around ...
- 49k
6
votes
Accepted
Cube stereo 150 race "do not clamp" warning
I believe that you should not clamp anywhere on a carbon-tubed bicycle. As @whatsisname discussed in this Stack Exchange post, carbon fiber can be made very strong, but if you want it to resist ...
- 29.5k
6
votes
Handlebar slips in quill stem clamp when going over bumps
A few things to think about:
Are you using grease or threadlocker on the bolt threads? This will minimize corrosion and galling problems, and means that the same final torque value is actually ...
- 2,825
6
votes
PRO LT Handlebar Stem asks to tighten top handlebar screws first before bottom screws? Conflicting manual instructions?
The card is telling you to tighten the top bolts until the gap is closed, then tighten the bottom ones. It does not mean to torque the top bolts to final tightness before tightening the bottom ones.
- 53.4k
5
votes
Slipping aluminium seatpost in aluminium frame
I had an exactly same problem: Ritchey WCS seatpost, Merida frame (both alu alloy) and a lightweight clamp, like in @Frisbee's answer. What I tried:
Beefy clamp with various torque settings. Didn't ...
- 5,699
5
votes
PRO LT Handlebar Stem asks to tighten top handlebar screws first before bottom screws? Conflicting manual instructions?
You should follow the instructions on the yellow cardboard. The manual contains the normal default procedure of tightening crosswise and evenly, but the second bullet point, "In case of ...
- 12.7k
5
votes
Can I attach a rear cargo rack directly to the seat clamp?
Before dual eyelets on the seatstays, using a single strut going to the seatstay bridge was common. Most racks either have the holes in the center for this or can be drilled. Then you flatten out a ...
- 81.7k
5
votes
Cutting back seatpost binder slot
Is the seatpost diameter out of spec? Seems odd that the ends are meeting like that. This has happened to me with alloy block tube/pinch grippers in the past. I just file them out if they stretch like ...
- 1,489
5
votes
Cruiser handlebar rotating because clamp not strong enough
Try some combination of these and potentially all four:
Very thoroughly lubricate the stem bolt threads and shoulders with grease, then torque them properly.
Roughen up or remove the paint on the bar ...
- 81.7k
4
votes
Accepted
How to change the seat clamp on a dropper post?
As you already noted you have to unscrew the remote from the handlebar and push the hose/cable into the frame so you can pull on the dropper post. Afterwards you just remove the screws from the seat ...
- 891
4
votes
Handlebar slips in quill stem clamp when going over bumps
You are correct that 10N is a low number for this kind of stem. It's hard to recommend carte blanche to go past a manufacturer recommended torque, but it seems likely that's what you'll have to do if ...
- 81.7k
3
votes
Handlebar slips in quill stem clamp when going over bumps
I had this handlebar it is not 25.4 it is 25 it's some strange standard, I had the same problem there was no way to torque it, you need to find some old 25mm stem.
- 37
3
votes
Very confused about the seatpost clamp
Turning the lever will not tighten or loosen the clamp.
The lever is a handle to allow you to twist what would normally be a nut by hand - instead of using a wrench.
Using the lever as a handle ...
- 20.6k
3
votes
Accepted
Shimano front-derailleur with 28.6 Clamp
You can buy a braze on derailleur of the type you need and get a Braze on to 28.6 adapter. Alternately, you can get a derailleur with a larger size and get a shim. Either will be perfectly functional. ...
- 342
3
votes
Brake lever clamp too loose for handlebars
Normal aluminum cans are basically .1mm thick, so a wrap gives you .2mm. Most of the smaller scale clamp diameter discrepancies, say from a tolerance problem or from a mismatch like a 26.0 aux lever ...
- 81.7k
3
votes
Brake hanger causing seatpost slippage?
@mikebaranczak I'm putting this as a separate answer, but feel free to incorporate this in yours.
Alessandro, Mike's suggestion is that the thickness of the hanger in the BLACK position may be enough ...
- 121k
3
votes
Accepted
Brake hanger causing seatpost slippage?
When the bolt is tightened, is the cable hanger free to move around? If it is, then it can't be causing the problem. But if it's held in place rigidly by the clamp, it probably means that it's ...
- 4,272
3
votes
Accepted
Braze on or what sort of clamp on a Cinelli frame?
The Cinelli spec for this bike lists it as "clamp on" and your picture definitely shows a clamp on style front derailleur.
While it does seem like the factory build comes with a Cinelli branded ...
- 5,486
3
votes
Accepted
Slipping aluminium seatpost in aluminium frame
After trying a chunkier clamp and hairspray, I found this
Clamp did not help much, the hairspray was better, but I was a little concerned about the solvent stuff in the aerosol.
The Liquid Torque ...
- 417
3
votes
Accepted
Seatpost clamp sizing issues?
First double check that it's not a simple case of it just being tight, which is actually pretty common. Remove the bolt completely and gently wedge it open just a little bit with a screwdriver, and ...
- 81.7k
3
votes
PRO LT Handlebar Stem asks to tighten top handlebar screws first before bottom screws? Conflicting manual instructions?
It is an 'eternal' and more of a philosophic question. Both variants are out and both seem to be true and not so. It is the same on the motorcycle front. The picture of the actual stem says clearly ...
- 8,259
3
votes
Saddle / Seat slowly creeps backwards
Carbon assembly paste increases friction and can be used for metals as well.
Make sure to use a torque wrench and tighten to the torque printed on the seatpost clamp.
From the photos of the Fizik ...
- 26k
3
votes
Cutting back seatpost binder slot
On this one you should start by cleaning it up, then take sandpaper or emery cloth and snake it through the gap and try to ever so slightly take it down and even it out. Then hit the clean bore with ...
- 81.7k
2
votes
Accepted
Brifter loose even with bolt tight
Two shims of double drink can thickness, one to the right of the clamp bolt and one to the left, solved the problem.
I speculate that the clamp had somehow bent or stretched slightly in the crash, so ...
- 643
2
votes
Brifter loose even with bolt tight
First thing to do is loosen the bolt all the way and grease the threads. If possible, snake a lube dripper in and get a drop of lube under the bolt shoulder too. That may completely fix it, but while ...
- 81.7k
2
votes
Accepted
Hose Clamp Salsa Watter Bottle Cage to Rigid Fork with No Sliding (Gravel)
Hose clamps should be more than adequate, although they will chew up the paint on your forks. You might consider an intermediate layer (could be as simple as electrical tape) to protect the paint. And ...
- 29.1k
2
votes
The best way to mount a rear rack
There is another option that is preferable to either of the ones you mention: P-clamps. These are small strips of sheetmetal bent into a P shape and covered with rubber. They fit around the seatstays ...
- 29.1k
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