Pedal installation
#1
Senior Member
Thread Starter
Join Date: Jan 2014
Posts: 53
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Pedal installation
Hello guys, me again.
So I bought new pedals (shimano SPD-SL ultegra) a week ago and today I checked to see if the pedal had come loose and it had, so i tightened it, this time with more force.
My question is: Is it easy to overtighten pedals, I'm not using a pedal wrench, I'm using a standard 15 mm wrench and it is 19 cm long.
If you do overtighten the pedals can the threads in the crank arm strip? Or will the threads on the pedals strip first?
So I bought new pedals (shimano SPD-SL ultegra) a week ago and today I checked to see if the pedal had come loose and it had, so i tightened it, this time with more force.
My question is: Is it easy to overtighten pedals, I'm not using a pedal wrench, I'm using a standard 15 mm wrench and it is 19 cm long.
If you do overtighten the pedals can the threads in the crank arm strip? Or will the threads on the pedals strip first?
#2
Old fart
Join Date: Nov 2004
Location: Appleton WI
Posts: 24,790
Bikes: Several, mostly not name brands.
Mentioned: 153 Post(s)
Tagged: 0 Thread(s)
Quoted: 3590 Post(s)
Liked 3,400 Times
in
1,934 Posts
No, you're unlikely to strip the threads using any hand tool, but if you rode for any length of time while the pedal was loose, the crank arm threads could have been damaged. If the damage is slight, you may be able to mitigate it by wrapping teflon plumber's tape around the pedal threads before installing the pedal. If that doesn't help, bring the crank arm in to a bike shop for replacement or helicoil repair.
#3
Senior Member
Join Date: Dec 2009
Location: Houston, TX
Posts: 28,682
Bikes: 1990 Romic Reynolds 531 custom build, Merlin Works CR Ti custom build, super light Workswell 066 custom build
Mentioned: 109 Post(s)
Tagged: 1 Thread(s)
Quoted: 6556 Post(s)
Likes: 0
Liked 58 Times
in
36 Posts
It is very unusual for pedals to loosen if properly installed. Tighten them firmly. Since the pedal threads are steel and the crank arm threads are aluminum, it is the crank arm that you have to worry about. Plus the crank arm is more expensive to replace. So be careful, but don't be afraid to make the pedals firmly tight. If you don't go overboard, there is little danger of damaging the crank arm threads either.
#4
Senior Member
Thread Starter
Join Date: Jan 2014
Posts: 53
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
No, you're unlikely to strip the threads using any hand tool, but if you rode for any length of time while the pedal was loose, the crank arm threads could have been damaged. If the damage is slight, you may be able to mitigate it by wrapping teflon plumber's tape around the pedal threads before installing the pedal. If that doesn't help, bring the crank arm in to a bike shop for replacement or helicoil repair.
#6
Mechanic/Tourist
19 cm is only 7.5 inches. that is NOT long enough to properly tighten pedals, and it's pretty much impossible to overtighten them. I would want to see you using at least a 30 cm wrench/lever, so that you can get adequate tightening with only about 30 lbs of pressure on the wrench (pedal wrenches are typically about 30 cm long) . Either get something you can use to add leverage to that wrench or get it tightened down properly with a pedal wrench before any more riding is done. As for progression, that is a small effect over time, not enough to offset inadequate tightening.
Last edited by cny-bikeman; 02-27-14 at 04:52 PM.
#7
Senior Member
Join Date: Aug 2009
Posts: 1,813
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 501 Post(s)
Liked 629 Times
in
372 Posts
Hello guys, me again.
So I bought new pedals (shimano SPD-SL ultegra) a week ago and today I checked to see if the pedal had come loose and it had, so i tightened it, this time with more force.
My question is: Is it easy to overtighten pedals, I'm not using a pedal wrench, I'm using a standard 15 mm wrench and it is 19 cm long.
If you do overtighten the pedals can the threads in the crank arm strip? Or will the threads on the pedals strip first?
So I bought new pedals (shimano SPD-SL ultegra) a week ago and today I checked to see if the pedal had come loose and it had, so i tightened it, this time with more force.
My question is: Is it easy to overtighten pedals, I'm not using a pedal wrench, I'm using a standard 15 mm wrench and it is 19 cm long.
If you do overtighten the pedals can the threads in the crank arm strip? Or will the threads on the pedals strip first?
#8
Senior Member
Join Date: Dec 2010
Location: Above ground, Walnut Creek, Ca
Posts: 6,681
Bikes: 8 ss bikes, 1 5-speed touring bike
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 86 Post(s)
Likes: 0
Liked 4 Times
in
4 Posts
as mentioned above, with that wrench i wouldn't think you would be able to strip the crank arm threads even if you tried. OTOH, i often use a wrench of that length (3/8" drive craftsman ratchet) on them just so i can't, but i put about two grunts worth of force on them. if i didn't i wouldn't be surprised if they loosened a bit.
#9
Senior Member
Join Date: Dec 2009
Location: Houston, TX
Posts: 28,682
Bikes: 1990 Romic Reynolds 531 custom build, Merlin Works CR Ti custom build, super light Workswell 066 custom build
Mentioned: 109 Post(s)
Tagged: 1 Thread(s)
Quoted: 6556 Post(s)
Likes: 0
Liked 58 Times
in
36 Posts
When installing and removing pedals I use the technique of squeezing the wrench and crank arm together between my fingers and palm. I get surprising force for tightening and loosening the pedals that way. No cheater pipe or long wrench is needed. Even with a 5 inch Allen wrench I can fully tighten my pedals (from behind) and never have trouble loosening them the same (reverse) way.
#10
Mechanic/Tourist
Although some people can have success with a shorter tool it's my practice to make suggestions that will work for the population at large. The fact that the OP was not able to tighten properly the 1st time with the wrench at hand calls for a change in approach. Of course if one does not use good technique for tightening the pedals, such as pointing the crank toward the back and the wrench forward, it will make proper tightening more difficult even with the correct tool.
#11
Senior Member
Join Date: Dec 2009
Location: Houston, TX
Posts: 28,682
Bikes: 1990 Romic Reynolds 531 custom build, Merlin Works CR Ti custom build, super light Workswell 066 custom build
Mentioned: 109 Post(s)
Tagged: 1 Thread(s)
Quoted: 6556 Post(s)
Likes: 0
Liked 58 Times
in
36 Posts
Although some people can have success with a shorter tool it's my practice to make suggestions that will work for the population at large. The fact that the OP was not able to tighten properly the 1st time with the wrench at hand calls for a change in approach. Of course if one does not use good technique for tightening the pedals, such as pointing the crank toward the back and the wrench forward, it will make proper tightening more difficult even with the correct tool.
#12
Senior Member
Join Date: Dec 2010
Location: Above ground, Walnut Creek, Ca
Posts: 6,681
Bikes: 8 ss bikes, 1 5-speed touring bike
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 86 Post(s)
Likes: 0
Liked 4 Times
in
4 Posts
you are right. with both hands at the end of even a short wrench handle and also around crank arm, it is possible to put a real hurttin' on the pedal threads. it almost always pops loose. i can just about feel it now!