Cranks loosening
03-24-07, 02:41 PM
#1
Yeah. I Race.
Thread Starter
Join Date: Jan 2007
Location: Northeastern PA
Posts: 2,888
Bikes: Custom Race, 2007 GT Bump, 2007 Gt Powerseries Pro, Dyno VFR
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Cranks loosening
I was riding my bike today and I noticed my cranks were loose. I just got it about a month ago. I tried to tighten them and they were tight, and then I rode it again and the cranks became loose again. Why do the cranks keep coming loose?
03-24-07, 04:57 PM
#2
Coast Freely
Join Date: Jan 2007
Location: bangalow, NSW, AUS
Posts: 220
Bikes: bmx
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
take it to a bike shop. or if your bb is unsealed the bearings may be coming loose and they just need a nip up.
cranks is a fairly general term.
your arms?
spindle?
bottom bracket? what?
cranks is a fairly general term.
your arms?
spindle?
bottom bracket? what?
03-24-07, 05:20 PM
#3
Yeah. I Race.
Thread Starter
Join Date: Jan 2007
Location: Northeastern PA
Posts: 2,888
Bikes: Custom Race, 2007 GT Bump, 2007 Gt Powerseries Pro, Dyno VFR
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Originally Posted by callumrides
take it to a bike shop. or if your bb is unsealed the bearings may be coming loose and they just need a nip up.
cranks is a fairly general term.
your arms?
spindle?
bottom bracket? what?
cranks is a fairly general term.
your arms?
spindle?
bottom bracket? what?
03-24-07, 05:29 PM
#5
Senior Member
Join Date: Nov 2005
Posts: 4,083
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
I usually don't post in BMX, but you want to get that crank bolt down real tight. Slip a pipe over the wrench and really give it a good tug. Riding a loose crank will deform the crank arms because they are soft AL and the BB spindle is hardened steel. This will ruin just about any crank fast and coming loose frequently is a good sign damage may have happened.
If it is a new bike, the shop may have screwed this up by under torquing the crank bolts. I would inspect the crank carefully and ask them to make it right if there is damage.
If it is a new bike, the shop may have screwed this up by under torquing the crank bolts. I would inspect the crank carefully and ask them to make it right if there is damage.
03-24-07, 05:31 PM
#6
I rule with a mighty leg
Join Date: Jan 2006
Location: Smithtown, NY
Posts: 8,571
Bikes: Fit Pro custom
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
My cranks never came loose.
__________________
I am Gunz. Gunz are me.
I am Gunz. Gunz are me.
03-24-07, 07:08 PM
#7
Senior Member
Join Date: Dec 2006
Location: California
Posts: 1,428
Bikes: 2008 Kink Transition with upgrades, 2007 Haro Thread 1 with upgrades.
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
That happens with my bike also. I have to tighten it everyday and when i get it as tight as it goes the next day its loose again.
03-24-07, 07:10 PM
#8
Yeah. I Race.
Thread Starter
Join Date: Jan 2007
Location: Northeastern PA
Posts: 2,888
Bikes: Custom Race, 2007 GT Bump, 2007 Gt Powerseries Pro, Dyno VFR
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Originally Posted by Punx
That happens with my bike also. I have to tighten it everyday and when i get it as tight as it goes the next day its loose again.
03-24-07, 07:11 PM
#9
Senior Member
Join Date: Dec 2006
Location: California
Posts: 1,428
Bikes: 2008 Kink Transition with upgrades, 2007 Haro Thread 1 with upgrades.
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
What is this Loc-tite you speak of.
03-24-07, 07:12 PM
#10
Yeah. I Race.
Thread Starter
Join Date: Jan 2007
Location: Northeastern PA
Posts: 2,888
Bikes: Custom Race, 2007 GT Bump, 2007 Gt Powerseries Pro, Dyno VFR
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Originally Posted by Punx
What is this Loc-tite you speak of.
03-24-07, 07:19 PM
#11
I rule with a mighty leg
Join Date: Jan 2006
Location: Smithtown, NY
Posts: 8,571
Bikes: Fit Pro custom
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Originally Posted by minichamp31
It sounds like you need some Loc-tite(sp?)
__________________
I am Gunz. Gunz are me.
I am Gunz. Gunz are me.
Last edited by FitRider 921; 03-24-07 at 07:42 PM.
03-24-07, 07:22 PM
#12
Yeah. I Race.
Thread Starter
Join Date: Jan 2007
Location: Northeastern PA
Posts: 2,888
Bikes: Custom Race, 2007 GT Bump, 2007 Gt Powerseries Pro, Dyno VFR
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Originally Posted by FitRider 921
You should feel proud.
03-24-07, 07:41 PM
#13
\,,/(^_^)\,,/
Join Date: Sep 2003
Location: Minneapolis, MN
Posts: 869
Bikes: Surly 1x1 Xtracycle, '01 Haro Flair Dave Mirra
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Loctite
Permatex
To get a REALLY good set, use the Anaerobic activator...stay away from the Reds...they are HARD to remove once set (next to impossible)
Permatex
To get a REALLY good set, use the Anaerobic activator...stay away from the Reds...they are HARD to remove once set (next to impossible)
__________________
You know you're getting old when you look at a beautiful 19-year-old girl and you find yourself thinking, "Gee, I wonder what her mother looks like?"
You know you're getting old when you look at a beautiful 19-year-old girl and you find yourself thinking, "Gee, I wonder what her mother looks like?"
03-24-07, 08:15 PM
#15
Long haired freak.
Join Date: Jun 2005
Location: Still stuck in hell.
Posts: 6,281
Bikes: 2011 SE Old Man Flyer.
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Originally Posted by barba
I usually don't post in BMX, but you want to get that crank bolt down real tight. Slip a pipe over the wrench and really give it a good tug. Riding a loose crank will deform the crank arms because they are soft AL and the BB spindle is hardened steel. This will ruin just about any crank fast and coming loose frequently is a good sign damage may have happened.
If it is a new bike, the shop may have screwed this up by under torquing the crank bolts. I would inspect the crank carefully and ask them to make it right if there is damage.
If it is a new bike, the shop may have screwed this up by under torquing the crank bolts. I would inspect the crank carefully and ask them to make it right if there is damage.
__________________
"the bus came by and I got on, that's when it all began...there was Cowboy Neal at the wheel of a bus to never-ever land."
"the bus came by and I got on, that's when it all began...there was Cowboy Neal at the wheel of a bus to never-ever land."
03-24-07, 09:27 PM
#17
Perpetual n00b
Join Date: May 2004
Location: Farmington, NM
Posts: 3,918
Bikes: '18 Kona Explosif, '18 Sunday Primer BMX, Giant Roam (ss converted), Old Peugeot (SS converted, broken)
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
Likes: 0
Liked 2 Times
in
1 Post
It still might screw it up, it's usually a terrible idea to ride things when they're loose.
03-24-07, 09:38 PM
#18
Baned.
Join Date: Feb 2005
Posts: 3,992
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
your most likely not tightening htem right
first losen the thing at the top of the cranks
then tighten the compression bolts on each side
then tighten the thing at the top
first losen the thing at the top of the cranks
then tighten the compression bolts on each side
then tighten the thing at the top
__________________
5000
5000
03-25-07, 08:33 AM
#20
Senior Member
Join Date: Dec 2006
Location: California
Posts: 1,428
Bikes: 2008 Kink Transition with upgrades, 2007 Haro Thread 1 with upgrades.
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Originally Posted by mude
your most likely not tightening htem right
first losen the thing at the top of the cranks
then tighten the compression bolts on each side
then tighten the thing at the top
first losen the thing at the top of the cranks
then tighten the compression bolts on each side
then tighten the thing at the top
03-25-07, 09:54 AM
#21
Senior Member
Why kind of cranks are they? That is kind of an important factor here. If you have older Odyssey cranks, get dat **** warrentied. If you have profiles, they just develop a bit of a wobble...make sure you have enough spacers and then loctite it. If you have wombots or Flys...they probably don't wobble. If you have primo's may as well take it and get profiles.
03-25-07, 06:44 PM
#24
ride.
Join Date: Dec 2005
Location: Connecticut
Posts: 2,260
Bikes: Premium 2005
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Originally Posted by barba
I usually don't post in BMX, but you want to get that crank bolt down real tight. Slip a pipe over the wrench and really give it a good tug. Riding a loose crank will deform the crank arms because they are soft AL and the BB spindle is hardened steel. This will ruin just about any crank fast and coming loose frequently is a good sign damage may have happened.
If it is a new bike, the shop may have screwed this up by under torquing the crank bolts. I would inspect the crank carefully and ask them to make it right if there is damage.
If it is a new bike, the shop may have screwed this up by under torquing the crank bolts. I would inspect the crank carefully and ask them to make it right if there is damage.
i think whats wrong is your bottom bracket is loose, assuming its american. if its unsealed there should be a big nut you tighten. im not 100% sure though i havnt even seen an american bb for a while.
03-26-07, 07:24 AM
#25
Dig.
Join Date: Mar 2005
Location: VA
Posts: 6,168
Bikes: FTW, Gunnar Roadie, Open U.P, Gunnar Rock Hound, S&M CCR
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Locktite them.
Then weld them and make custom Wombolts! (Sarcasm)
If you have one piece cranks...they come loose alot.
Take it to a shop.
Then weld them and make custom Wombolts! (Sarcasm)
If you have one piece cranks...they come loose alot.
Take it to a shop.