Pedal Extender Question
#1
Newbie
Thread Starter
Join Date: Sep 2019
Posts: 2
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Pedal Extender Question
I recently purchased Stamp 7 pedals. The spindle has an 8 mm allen key. I then bought 15 mm pedal extenders. The hole in the extenders is not large enough for the allen wrench to go through the extender and into the end of the spindle so I can then tighten the extender before installing on the crank. The extender has the usual flat spots for a pedal wrench.
Has anyone encountered this? There doesn't seem to be any other way to tighten the extender on the pedal spindle.
Is it possible to buy an extender with a larger diameter hole for the allen wrench?
thanks
Bucksnort
Has anyone encountered this? There doesn't seem to be any other way to tighten the extender on the pedal spindle.
Is it possible to buy an extender with a larger diameter hole for the allen wrench?
thanks
Bucksnort
#2
Senior Member
Join Date: Aug 2005
Location: Pittsburgh, PA
Posts: 33,656
Bikes: '96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '20 Surly Midnight Special, All are 3x10. It is hilly around here!
Mentioned: 39 Post(s)
Tagged: 0 Thread(s)
Quoted: 2026 Post(s)
Likes: 0
Liked 1,096 Times
in
742 Posts
An 8 mm (or 11/32") drill bit should make the hole the right size.
#3
Very Senior Member
Join Date: Mar 2018
Location: Always on the Run
Posts: 1,211
Bikes: Giant Quasar & Fuji Roubaix
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 413 Post(s)
Liked 343 Times
in
244 Posts
I must be missing something here I thought you install the extenders on the cranks with a regular open end wrench and then install the pedals on the extenders using an Allen wrench. What am I missing here? I'm old and easily confused, but this is troubling me.
#4
Senior Member
Join Date: Sep 2010
Location: Roswell, GA
Posts: 8,319
Bikes: '93 Trek 750, '92 Schwinn Crisscross, '93 Mongoose Alta
Mentioned: 30 Post(s)
Tagged: 0 Thread(s)
Quoted: 1438 Post(s)
Liked 1,092 Times
in
723 Posts
So Hillrider's suggestion to enlarge the holes should work if the (presumably) steel has not been hardened.
#5
Very Senior Member
Join Date: Mar 2018
Location: Always on the Run
Posts: 1,211
Bikes: Giant Quasar & Fuji Roubaix
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 413 Post(s)
Liked 343 Times
in
244 Posts
The OP states "The hole in the extenders is not large enough for the allen wrench to go through the extender" So if the extenders are on or off of the crank he cannot tighten the pedals into the extenders.
So Hillrider's suggestion to enlarge the holes should work if the (presumably) steel has not been hardened.
So Hillrider's suggestion to enlarge the holes should work if the (presumably) steel has not been hardened.
Edit-I looked up the Stamp 7 pedals (they are biggies, aren't they?) and now I understand. Thank you dsbrantjr.
#6
Senior Member
Join Date: Sep 2010
Location: Roswell, GA
Posts: 8,319
Bikes: '93 Trek 750, '92 Schwinn Crisscross, '93 Mongoose Alta
Mentioned: 30 Post(s)
Tagged: 0 Thread(s)
Quoted: 1438 Post(s)
Liked 1,092 Times
in
723 Posts
Yes, there are no wrench flats on the pedals. And just to add to the confusion, you have to turn the hex wrench counterclockwise on the drive side, and vice versa, as a result.
#7
Senior Member
Join Date: Aug 2005
Location: Pittsburgh, PA
Posts: 33,656
Bikes: '96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '20 Surly Midnight Special, All are 3x10. It is hilly around here!
Mentioned: 39 Post(s)
Tagged: 0 Thread(s)
Quoted: 2026 Post(s)
Likes: 0
Liked 1,096 Times
in
742 Posts
#8
rebmeM roineS
Join Date: Jan 2006
Location: Metro Indy, IN
Posts: 16,216
Bikes: Bacchetta Giro A20, RANS V-Rex, RANS Screamer
Mentioned: 15 Post(s)
Tagged: 0 Thread(s)
Quoted: 653 Post(s)
Liked 347 Times
in
226 Posts
Seems that some pedal extenders cannot be used with some pedals.
__________________
Bacchetta Giro A20, RANS V-Rex, RANS Screamer
Bacchetta Giro A20, RANS V-Rex, RANS Screamer
Likes For JanMM:
#9
Senior Member
Join Date: Feb 2012
Location: Golden, CO and Tucson, AZ
Posts: 2,842
Bikes: 2012 Specialized Elite Disc, 1983 Trek 520
Mentioned: 13 Post(s)
Tagged: 0 Thread(s)
Quoted: 678 Post(s)
Liked 744 Times
in
433 Posts
Not quite. An 8 mm hex is measured flat face to flat face. You need a larger hole to fit the points of the hex. (Ask me how I know....)
These extenders have a large hole. In the questions section, they say a hex wrench will fit through them.
These extenders have a large hole. In the questions section, they say a hex wrench will fit through them.
#10
Full Member
Join Date: Mar 2015
Location: Gatineau, Quebec
Posts: 293
Bikes: Lynskey GR270
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 115 Post(s)
Liked 69 Times
in
49 Posts
Depending of your pedals, you may be able to grind a wrench flat. I did just that with a belt sander and some M785 pedals.
#11
Senior Member
Join Date: Aug 2005
Location: Pittsburgh, PA
Posts: 33,656
Bikes: '96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '20 Surly Midnight Special, All are 3x10. It is hilly around here!
Mentioned: 39 Post(s)
Tagged: 0 Thread(s)
Quoted: 2026 Post(s)
Likes: 0
Liked 1,096 Times
in
742 Posts
#12
Senior Member
Join Date: Sep 2005
Location: In the foothills of Los Angeles County
Posts: 25,341
Mentioned: 8 Post(s)
Tagged: 0 Thread(s)
Quoted: 8313 Post(s)
Liked 9,108 Times
in
4,503 Posts
I've used extenders since I had to have them custom made and I have not tried extenders with holes and I would be suspect of their strength.
I always use pedals with wrench flats but they are becoming more unusual. I don't like the stupid 8mm allen thing.
I always use pedals with wrench flats but they are becoming more unusual. I don't like the stupid 8mm allen thing.
#13
Senior Member
Join Date: Sep 2005
Location: In the foothills of Los Angeles County
Posts: 25,341
Mentioned: 8 Post(s)
Tagged: 0 Thread(s)
Quoted: 8313 Post(s)
Liked 9,108 Times
in
4,503 Posts
#14
Senior Member
Join Date: Apr 2017
Location: Los Angeles, CA
Posts: 2,249
Bikes: 1964 Legnano Roma Olympiade, 1973 Raleigh Super Course, 1978 Raleigh Super Course, 1978 Peugeot PR10, 2002 Specialized Allez, 2007 Specialized Roubaix, 2013 Culprit Croz Blade
Mentioned: 68 Post(s)
Tagged: 0 Thread(s)
Quoted: 741 Post(s)
Liked 818 Times
in
421 Posts
I've been using pedal extenders for years. On pedals without wrench flats, I screw the extenders to the pedal arm using the flats on the extender, then using a rag to protect the pedal shaft, take a pair of vice grips and snug the pedal to the extender. Never had a problem with them loosening (they kind of self tighten as you ride) or removing them the same way. I grease the threads before assembly just in case.
Edit: I just looked up Stamp 7 pedals. Wierd looking suckers. You would need a very thin vice grip to grab them. The drilled extenders may be your only answer.
This is an XT pedal without wrench flats with a pedal extender. The hex just in board of the pedal turns with the pedal, and is no help for tightening. I just grip the shaft with padded vice grips and snug it up. No big deal.
Edit: I just looked up Stamp 7 pedals. Wierd looking suckers. You would need a very thin vice grip to grab them. The drilled extenders may be your only answer.
This is an XT pedal without wrench flats with a pedal extender. The hex just in board of the pedal turns with the pedal, and is no help for tightening. I just grip the shaft with padded vice grips and snug it up. No big deal.
Last edited by Slightspeed; 10-02-19 at 04:51 PM.