Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  


Go Back   > >

Adaptive Cycling: Handcycles, Amputee Adaptation, Visual Impairment, and Other Needs Have a need for adaptive equipment to ride to compensate for a disability or loss of limb or function? This area is for discussion among those of us in the cycling world that are coming back from traumatic circumstances and tell the world, "No, you are not going to beat me down!"

User Tag List

Reply
 
Thread Tools Search this Thread
Old 12-12-16, 05:10 PM   #26
Miele Man
Senior Member
 
Join Date: Jun 2014
Bikes:
Posts: 1,815
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 195 Post(s)
With regards to pedal extenders and crank eyes. Does the use of a pedal extender and the resulting extra torque on the pedal eye become a concern for the pedal eye on the crank arm breaking? has anyone broken a crank eye whilwt using a pedal extender?

Thanks and cheers
Miele Man is offline   Reply With Quote
Old 02-05-17, 02:59 PM   #27
Sweetheart14
Junior Member
Thread Starter
 
Join Date: Jan 2016
Bikes:
Posts: 22
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 5 Post(s)
It's very exciting, we just sold a set of Pedal Extenders in Iceland, that makes 14 countries that we have sold our Pedal Extenders in, when my husband and I first started making and selling our Pedal Extenders, I never dreamed that we would be selling these Pedal Extenders around the world. I am very excited and happy.
Sweetheart14 is offline   Reply With Quote
Old 02-14-17, 01:28 PM   #28
Bezalel
Senior Member
 
Join Date: Mar 2010
Location: City of Brotherly Love
Bikes: Raleigh Companion, Nashbar Touring, Novara DiVano, Trek FX 7.1, Giant Upland
Posts: 1,561
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 18 Post(s)
Quote:
Originally Posted by Miele Man View Post
With regards to pedal extenders and crank eyes. Does the use of a pedal extender and the resulting extra torque on the pedal eye become a concern for the pedal eye on the crank arm breaking? has anyone broken a crank eye whilwt using a pedal extender?

Thanks and cheers


I'd think it would only be an issue if the rider is putting out alot of power to begin with.
Bezalel is offline   Reply With Quote
Old 02-15-17, 01:15 PM   #29
DarKris
Senior Member
 
DarKris's Avatar
 
Join Date: Dec 2015
Location: Buffalo, NY
Bikes: Nashbar Cyclocross Bike
Posts: 230
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 42 Post(s)
Out of curiosity do these have a weight limit or no?
DarKris is offline   Reply With Quote
Old 02-20-17, 08:42 AM   #30
Sweetheart14
Junior Member
Thread Starter
 
Join Date: Jan 2016
Bikes:
Posts: 22
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 5 Post(s)
We have not officially tested them for weight limits. We did put them in a 20 ton press. The crank arm broke and the extender didn't. But once the crank arm broke we didn't test it an further. Hope this helps.
Sweetheart14 is offline   Reply With Quote
Old 02-23-17, 12:07 PM   #31
909tr1
Junior Member
 
Join Date: Aug 2014
Location: inland empire
Bikes: nashbar touring
Posts: 8
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Quote:
Originally Posted by Sweetheart14 View Post
We have not officially tested them for weight limits. We did put them in a 20 ton press. The crank arm broke and the extender didn't. But once the crank arm broke we didn't test it an further. Hope this helps.
I just bought two sets in the 20mm size. I don't think the extenders would break as the extenders look very solid. However, does the extender cause the cranks to break? If the crank is more likely to break, how much stress can the crank take with the extenders on before it breaks?
I ride casually and I am not too concerned about. I don't put a ton of torque on my cranks. Sometimes when I climb hills does it put some stress on the cranks. I will do a long term test on these to see how it turns out.
909tr1 is offline   Reply With Quote
Old 03-28-17, 10:07 AM   #32
Sweetheart14
Junior Member
Thread Starter
 
Join Date: Jan 2016
Bikes:
Posts: 22
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 5 Post(s)
Hello,
Thank you for running a test. I don't see it harming the cranks unless you hit it with something hard or put a few tons of force on them.
Sweetheart14 is offline   Reply With Quote
Old 03-28-17, 10:08 AM   #33
Sweetheart14
Junior Member
Thread Starter
 
Join Date: Jan 2016
Bikes:
Posts: 22
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 5 Post(s)
Would like some feed back. We have had a few request for 15mm pedal extenders. We are trying to decide if we should make a few. Do you all think it would be a popular things?
Sweetheart14 is offline   Reply With Quote
Old 04-16-17, 09:48 PM   #34
Popete
Junior Member
 
Join Date: Apr 2017
Bikes:
Posts: 5
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
WARNING - I purchased a set of these stainless steel pedal extenders made by Aseparts and sold by Cherryboy.t on eBay, and I suffered a CATASTROPHIC FAILURE while riding my bicycle.

The pedal extender on my right pedal snapped off at the end of where the threads are cut, resulting in my right foot hitting the pavement, my abdomen hitting my handlebars, and my body being flung into the center of the roadway. I suffered a sore right ankle, cuts and abrasions on my right elbow and right knee, a chip in my right elbow, and severe hematoma in my abdomen.

I believe my accident is due to the FAULTY DESIGN of this product - these pedal extenders are made with a HOLLOW CENTER. I believe that over time, the push and pull action on a bicycle pedal will cause the pedal extender to break off at the point where the threads are cut. I had used these pedal extenders for about 8 months before the right one broke off without any warning.

I have looked at pedal extenders being sold by other companies, and they are all made out of a SOLID piece of metal. And I am unable to find any bicycle pedal manufacturer making pedals with a hollow axel. I believe Aseparts needs to stop production of these hollow pedal extenders immediately.

When I tried to contact the Aseparts company after my accident, the only contact information I could find was that the seller was “Cherryboy.t” on eBay. I sent a message (thru eBay) describing my accident and asked if they were aware of any other failures of their pedal extenders. Cherryboy.t responded saying if I sent my broken pedal back, they would send me a new set. I wrote back, saying I did not want another set, all I wanted to know is if there were any other people who have reported a broken pedal extender. Cherryboy.t responded saying if I sent my broken pedal back, they would refund my money.

I was very upset. At no time did Cherryboy.t ask about my injuries, or offer any indication that they cared about the possibility of a defect in their product design. And they never did respond to my question about whether any other people had reported a broken pedal extender. The only way I could contact the Aseparts company was through eBay, and I had no idea who I was corresponding with, where the company was located, or what the company’s phone number was. All I had was the name of an eBay store called "Cherryboy.t".

My advice to anyone purchasing pedal extenders, or any other critical bicycle component where its failure could result in the loss of your life, is to deal only with a reputable manufacturer. Select one with a website, an address, contact information, and a good reputation, where you can contact them if you have any problem with the product. From what I can tell, the Aseparts company is a few people living near Jacksonville FL with access to a machine shop who formed an LLC to sell some automotive parts on eBay. I have serious doubt whether they perform any research and development on these pedal extenders, or have any quality control in place, or are regulated by any manufacturing rules or regulations.

Luckily, after 10 months my injuries have healed, and I believe I learned a valuable lesson about making eBay purchases. My purpose in writing this message is to warn other people, so they do not make the same mistake that I did.
Popete is offline   Reply With Quote
Old 04-16-17, 10:06 PM   #35
Popete
Junior Member
 
Join Date: Apr 2017
Bikes:
Posts: 5
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Quote:
Originally Posted by 909tr1 View Post
I just bought two sets in the 20mm size. I don't think the extenders would break as the extenders look very solid. However, does the extender cause the cranks to break? If the crank is more likely to break, how much stress can the crank take with the extenders on before it breaks?
I ride casually and I am not too concerned about. I don't put a ton of torque on my cranks. Sometimes when I climb hills does it put some stress on the cranks. I will do a long term test on these to see how it turns out.
I suggest that you not perform a long term test with these pedal extenders. When mine broke off, I didn't even know what happened, I just ended up in the middle of the street, bloody and bruised. I got up, pulled my bicycle onto the grass, sat down and noticed my pedal had broken off, right where the pedal extender screws into the crank. I had used the pedal extenders about 8 months before they failed without any warning.

I believe there is a major design flaw in these Aseparts pedal extenders - they have a HOLLOW shaft. I think the push-pull on the pedal weakens the pedal extender over time, until it snaps off. Kind of like when you bend a metal tube back and forth, back and forth, until it eventually breaks in half.

After my accident, I looked at other pedal extenders and found they are all machined out of a solid piece of metal. I assume they do this to increase their strength. So it got me to thinking, are there any bicycle pedals manufactured with hollow axels ? Nope, I couldn't find a single pedal made with a hollow axel. I'm thinking that if no pedals are made with hollow axels, it's probably not a good idea to use a hollow pedal extender.
Popete is offline   Reply With Quote
Old 04-16-17, 10:21 PM   #36
Popete
Junior Member
 
Join Date: Apr 2017
Bikes:
Posts: 5
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Quote:
Originally Posted by Miele Man View Post
With regards to pedal extenders and crank eyes. Does the use of a pedal extender and the resulting extra torque on the pedal eye become a concern for the pedal eye on the crank arm breaking? has anyone broken a crank eye whilwt using a pedal extender?

Thanks and cheers
I have never had a crank arm break off, but believe me, it would be a catastrophic crash. I had a terrible crash with a set of these Aseparts pedal extenders that Sweetheart14 and her husband sell. My pedal extender broke off right where it screws into the crank, leaving the threaded part of the pedal extender in the crank, and leaving me sprawled out in the middle of the street after my foot hit the ground. Luckily there wasn't any traffic on the road, so I didn't get run over, and my injuries healed up after 5-6 months. But I had no idea that breaking off a pedal or a crank or a pedal extender would result in such a bad crash !
Popete is offline   Reply With Quote
Old 04-17-17, 08:14 AM   #37
ColonelSanders
Senior Member
 
ColonelSanders's Avatar
 
Join Date: Jan 2014
Location: Brisbane, Australia
Bikes: 2016 Giant Toughroad SLR 2, 1995 Trek 830
Posts: 2,803
Mentioned: 17 Post(s)
Tagged: 0 Thread(s)
Quoted: 577 Post(s)
Wow, I would not want hollow pedal extenders.
ColonelSanders is offline   Reply With Quote
Old 04-17-17, 12:24 PM   #38
R200
Newbie
 
Join Date: May 2008
Bikes:
Posts: 3
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Quote:
Wow, I would not want hollow pedal extenders.
I own pedal extenders from KneeSavers, Sunlite, and Aseparts that I use on a variety of bicycles and unicycles. Although I weigh about 250 pounds and tend to mash the pedals more than I should, I have had no problem with any of these. Even though I haven't conducted a specific stress analysis, as an engineer I don't see any problem with the hollow shaft Aseparts design.

The majority of the strength of this kind of component will be in the outside skin of the extension so a solid core doesn't offer as much additional strength as one might otherwise think. Frankly, I am more concerned with the large step and resulting stress concentration of the other designs. In any event, the choice of material and heat treatment will have a greater effect on the yield strength than the differences between any of these geometries.

Overall I am happy with the Aseparts version and I plan to buy a few more. Their price is very reasonable, it is made in America, and you can almost buy all three sizes for the price of one pair of KneeSavers. I will add though that I think it is critical that any leverage enhancing component like this be kept tight and I would avoid using any washers that might reduce the threaded coupling area and/or aggravate the strain.
R200 is offline   Reply With Quote
Old 04-23-17, 07:06 PM   #39
Popete
Junior Member
 
Join Date: Apr 2017
Bikes:
Posts: 5
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Quote:
Originally Posted by R200 View Post
I own pedal extenders from KneeSavers, Sunlite, and Aseparts that I use on a variety of bicycles and unicycles. Although I weigh about 250 pounds and tend to mash the pedals more than I should, I have had no problem with any of these. Even though I haven't conducted a specific stress analysis, as an engineer I don't see any problem with the hollow shaft Aseparts design.

The majority of the strength of this kind of component will be in the outside skin of the extension so a solid core doesn't offer as much additional strength as one might otherwise think. Frankly, I am more concerned with the large step and resulting stress concentration of the other designs. In any event, the choice of material and heat treatment will have a greater effect on the yield strength than the differences between any of these geometries.

Overall I am happy with the Aseparts version and I plan to buy a few more. Their price is very reasonable, it is made in America, and you can almost buy all three sizes for the price of one pair of KneeSavers. I will add though that I think it is critical that any leverage enhancing component like this be kept tight and I would avoid using any washers that might reduce the threaded coupling area and/or aggravate the strain.
I wish somebody would perform a real stress test on the hollow pedal extenders. I still think the hollow shaft is the reason why mine broke off and caused my crash. I had no washers on the extender and it was screwed in tight.

When comparing the difference between Kneesavers, Sunlight and Aseparts, be sure to examine the company structure. Both Kneesavers and Sunlight have been around a long time and have a company web page. There is a company address and contact information where you can call and talk to a real person. There are reviews that you can read about their products.

But for Aseparts, all you can find is an eBay seller called " cherry boy.t ", with no way to contact the company other than thru the eBay message system. Since my pedal extender broke 8 months after my eBay purchase, I am unable to leave any buyer feedback on eBay warning others of their catastrophic failure. And I am unable to find the Aseparts company listed anywhere that I can file a complaint or leave a review.

I am pretty sure if I had purchased a Kneesavers or Sunlight pedal extender and one of them broke off, those companies would have been all over it trying to fix it right. Aseparts did not seem to care in the least, but then again, I couldn't even call and talk to them on the phone. All I could do is send an eBay message.

Sometimes you get what you pay for. I really think the extra dollars for the reputable pedals from Kneesavers and Sunlight are worth the safety and peace of mind.
Popete is offline   Reply With Quote
Old 04-27-17, 01:08 AM   #40
Miele Man
Senior Member
 
Join Date: Jun 2014
Bikes:
Posts: 1,815
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 195 Post(s)
Quote:
Originally Posted by Popete View Post
I wish somebody would perform a real stress test on the hollow pedal extenders. I still think the hollow shaft is the reason why mine broke off and caused my crash. I had no washers on the extender and it was screwed in tight.

When comparing the difference between Kneesavers, Sunlight and Aseparts, be sure to examine the company structure. Both Kneesavers and Sunlight have been around a long time and have a company web page. There is a company address and contact information where you can call and talk to a real person. There are reviews that you can read about their products.

But for Aseparts, all you can find is an eBay seller called " cherry boy.t ", with no way to contact the company other than thru the eBay message system. Since my pedal extender broke 8 months after my eBay purchase, I am unable to leave any buyer feedback on eBay warning others of their catastrophic failure. And I am unable to find the Aseparts company listed anywhere that I can file a complaint or leave a review.

I am pretty sure if I had purchased a Kneesavers or Sunlight pedal extender and one of them broke off, those companies would have been all over it trying to fix it right. Aseparts did not seem to care in the least, but then again, I couldn't even call and talk to them on the phone. All I could do is send an eBay message.

Sometimes you get what you pay for. I really think the extra dollars for the reputable pedals from Kneesavers and Sunlight are worth the safety and peace of mind.
If there's no way to contact a company or seller BEFORE I buy then that to me is a red flag to avoid that seller.

Cheers
Miele Man is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -6. The time now is 11:12 AM.


 
  • Ask a Question
    get answers from real people!
Click to start entering your question.
I HAVE A QUESTION