[Mother Theresa]

Seeing as my bike came with an impossibly long 130mm stem and my back was hurting I bought a spangly carbon stem at 90mm to grip my 3T bar. All is good unless I go over a jolt (common in Northamptonshire) at which point the bars move about 10 degrees downwards. By the end of a long run the drops are higher than than the hoods. The stem is torqued correctly.

What is the best thing to wrap around the bar to make it 1-2mm thicker? The answer is definitely not electrical insulation tape as that has made it worse rather than better. 

All responses gratefully received.

 

MT

Topic

[Mother Theresa]

Butty wrote:

Is this Mother T an ex-SNetter? 

 

The same (“there can only be one”)…

[Anonymous]

Is this Mother T an ex

Is this Mother T an ex-SNetter? 

[roomservicetaco]

Best shim is an aluminum soda

Best shim is an aluminum soda can.  You can cut one with metal shears or heavy-duty scissors.  Make the cuts radially that the shim is curved.

Sandpaper (as mentioned above) is also a good solution.

[Mother Theresa]

I went with the inner tube

I went with the inner tube solution which worked very nicely so thank-you. It might be my imagination but some of the road buzz has been mopped up too so double plus.

[The _Kaner]

Any chance you have a 31.7mm

Any chance you have a 31.7mm bar with a 31.8mm Stem?

I know Deda are normally 31.7mm…not sure if that tiny 0.1mm makes that much difference…

Carbon assembly paste is always a good idea, even if not carbon surfaces for both stem/bar.

Also…Tighten the top faceplate’s clamping bolts until the top is completely closed and the faceplates sit flush against the stem body. This ensures that the clamping forces will be even across the bar (then check that the torque is correct usually 5-6nm). If you have far exceeded this, there is a chance you may already have deformed one or other of the components and that is why they may not be seating properly.

[Vejnemojnen]

use toothpaste or some grippy

use toothpaste or some grippy compound

 

and get another frame.. 90mm is faaaaar to short.

 

at least you should be on 120mm. I only ride 130 and longer  🙂

[. .]

Have you re-checked the bolt

Have you re-checked the bolt torque after the first ride?   Repeat until the bolts don’t tighten any further.

[CXR94Di2]

Fine grit sand paper folded
Fine grit sand paper folded to give double sided rough. You can glue the inside to stop slippage

[Mother Theresa]

Well I’m not sure it is

Well I’m not sure it is exactly right so I’ll give the inner tube a go, thanks guys.

[Bowks]

If you’re sure the stem is

If you’re sure the stem is the correct unit to cope with your handlebar diameter, try some carbon assembly paste.

[jackcf]

I don’t know if this would

I don’t know if this would work foryour bars, but I use sections of old inner tubes to make up width if I need to for things like lights. I find they work better than the spacers that come as standard as they are much grippier (grippy-er?).

[Author]

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