bars keeps moving towards me
#1
Junior Member
Thread Starter
Join Date: Jun 2011
Posts: 19
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
Liked 0 Times
in
0 Posts
bars keeps moving towards me
Any tricks here to make it more fixed in place? I tightened all bolts strong enough I believe.
Bike doesn't have any grooves there to make it easier.
Bike doesn't have any grooves there to make it easier.
#2
n00b
Join Date: Jan 2008
Location: Austin, TX
Posts: 1,397
Bikes: Surly Karate Monkey, Twin Six Standard Rando
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 428 Post(s)
Liked 466 Times
in
273 Posts
remove the handlebar and lightly sand the inside of the stem where it grabs the bar. any debris in that area can cause a slip.
make sure the handlebar clamp area is also nice and clean.
grease the threads of the bolts.
tighten the bolts EVENLY in front of and behind the handlebar.
most BMX stems have some bolt old M8 bolts. you should have no problem putting 12 Nm of torque on those bolts. it's very possible to over-tighten bolts, which can cause the handlebar to get smooshed. it will never really tighten evenly when it gets to that point.
make sure the handlebar clamp area is also nice and clean.
grease the threads of the bolts.
tighten the bolts EVENLY in front of and behind the handlebar.
most BMX stems have some bolt old M8 bolts. you should have no problem putting 12 Nm of torque on those bolts. it's very possible to over-tighten bolts, which can cause the handlebar to get smooshed. it will never really tighten evenly when it gets to that point.
#3
Junior Member
Thread Starter
Join Date: Jun 2011
Posts: 19
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
Liked 0 Times
in
0 Posts
thanks, after sanding it looks like it helped although from time to time I am able to tighten bolts more, like they were backing up.
Don't get why neither clamps or bars has no grooves preventing slippage.
Don't get why neither clamps or bars has no grooves preventing slippage.
#4
n00b
Join Date: Jan 2008
Location: Austin, TX
Posts: 1,397
Bikes: Surly Karate Monkey, Twin Six Standard Rando
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 428 Post(s)
Liked 466 Times
in
273 Posts
If bars fit so tight that they never slip, you'd break your wrist on a hard enough landing. It should take a LOT of force to make them slip, but if manufacturers started making stems and bars that never slip, you'd regret owning that setup when you land a stair gap with too much front end attitude.
Likes For mack_turtle:
#5
BMX Connoisseur
Join Date: Jun 2016
Location: Canada
Posts: 774
Bikes: 1988 Kuwahara Newport, 1983 Nishiki, 1984 Diamond Back Viper, 1991 Dyno Compe
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 399 Post(s)
Liked 108 Times
in
69 Posts
Check your bars to make sure that they are not pinched/crushed where they are in the stem.
#6
Live not by lies.
Join Date: Nov 2020
Posts: 1,306
Bikes: BigBox bikes.
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 860 Post(s)
Liked 784 Times
in
582 Posts
Sandpaper/emery cloth
Take it apart.
get some sandpaper or emery cloth or crocus cloth. Fold it over itself twice so some faces handlebar, some faces headset, and some folds back into other sandpaper.
With this piece in between handlebar and gooseneck it won’t slip anymore.
get some sandpaper or emery cloth or crocus cloth. Fold it over itself twice so some faces handlebar, some faces headset, and some folds back into other sandpaper.
With this piece in between handlebar and gooseneck it won’t slip anymore.
#10
BMX Connoisseur
Join Date: Jun 2016
Location: Canada
Posts: 774
Bikes: 1988 Kuwahara Newport, 1983 Nishiki, 1984 Diamond Back Viper, 1991 Dyno Compe
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 399 Post(s)
Liked 108 Times
in
69 Posts
I think I stopped reading BMX plus in 1994 I always thought calling them a gooseneck was a weird Canadian thing from the 80's. I didn't know that a gooseneck was actually a style of a extra large road bike stem. I have no idea where or why we started calling them goosenecks but I blame the lack of internets.
#14
Hack
Join Date: Sep 2015
Location: Ottawa, Ontario, Canada
Posts: 1,265
Bikes: TrueNorth CX bike, 88 Bianchi Strada (currently Sturmey'd), Yess World Cup race BMX, Pure Cruiser race BMX, RSD Mayor v3 Fatbike
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 347 Post(s)
Liked 190 Times
in
132 Posts
So - carbon assembly paste is another option - it's meant to increase friction, but sanding and torquing to the right amount should be all you need to do.
BMX bikes are pretty much the only style that has anywhere near that much torque on the bar's clamp. Mountain bike bars are pretty close to straight, road bikes don't have near the difference. Time Trial bars would be the only other that would be close in how much leverage is on that joint.
BMX bikes are pretty much the only style that has anywhere near that much torque on the bar's clamp. Mountain bike bars are pretty close to straight, road bikes don't have near the difference. Time Trial bars would be the only other that would be close in how much leverage is on that joint.