Finger-Wrap-Rule (FWR) for remembering pedal threading.

May 16th, 2007 by Brad Quartuccio

Here’s a simple rule of thumb to remember the direction of pedal threading, building on my earlier Righty tighty, lefty loosey - some of the time post. We’ll call it the finger-wrap-rule, and its applicable to any and all bolts assuming you know the direction of threading, but for now let’s just use it for pedals.

Hold your right hand out like so. Notice which way your finger wrap around? Thats the direction a right hand threaded bolt tightens if you imagine your thumb as the bolt, and your hand as the head.

Next, imagine holding your right hand up to your right (driveside) pedal, your thumb being the axle and hand the pedal. See which way your fingers wrap? Thats the way to turn that pedal to tighten it.

Move to the left hand side of the bike (non-driveside) and repeat the procedure, but with your left hand. Thumb as axle, hand as pedal - your left pedal tightens the way your left fingers wrap.

Use your right hand on the right side of the bike and left hand on the left side of the bike, and never again forget which way your pedals thread.

9 Responses to “Finger-Wrap-Rule (FWR) for remembering pedal threading.”

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1 fixedgear on May 16th, 2007 at 12:25 pm

Or:

No matter which side of the bike you are facing, towards the rear wheel = tight and towards the front = loose.
2 Guitar Ted on May 16th, 2007 at 5:45 pm

A sage mechanic once showed me how to determine thread direction. Hold the threaded portion, (in this case, a pedal) so that the end that is going to be inserted is pointing up. Look to see which way the threads slope upwards. If the threads slope upards to the right, it’s right hand thread, upwards to the left, then it’s left hand thread.

This has served me well for over 15 years, but to each their own. As long as you find a system that works for you and you stick with it.
3 Mark on May 17th, 2007 at 6:37 pm

It’s simple rule Thanks
4 Brad on May 17th, 2007 at 8:23 pm

Nice Ted.
5 jdb on May 18th, 2007 at 11:31 am

I’m too lazy to look up the bottom bracket cup directions. Is it the same as the pedal threads?
6 S. cerevisiae on May 18th, 2007 at 10:26 pm

Reminds me of electrostatics in physics. Wrapping ones hand around a wire carrying a current to determine which direction the polarity of its resulting magnetic field rotates…I feel the same now as then *coughs* twentyfi.. years ago *cough*

I need a beer
7 Ariel on Jul 14th, 2007 at 1:14 pm

Heres a good one. No matter what side it is, spin the cranks backwards to tighten. No thinking involved.
8 Tessy Ellis on Aug 6th, 2008 at 5:07 am

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1 Blue Collar Mountain Biking » Blog Archive » How to visually differentiate RH from LH threads. | Mountain Bike Reviews, Deals and How Tos Pingback on May 25th, 2007 at 10:48 am

Finger-Wrap-Rule (FWR) for remembering pedal threading.

9 Responses to “Finger-Wrap-Rule (FWR) for remembering pedal threading.”

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