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From: Zen Cycle <funkmaster@hotmail.com>
Newsgroups: rec.bicycles.tech
Subject: Re: wtf chain ring bolts
Date: Thu, 6 Mar 2025 16:41:06 -0500
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On 3/6/2025 4:34 PM, AMuzi wrote:
> On 3/6/2025 2:26 PM, Jeff Liebermann wrote:
>> On Thu, 06 Mar 2025 12:46:42 -0500, Catrike Ryder
>> <Soloman@old.bikers.org> wrote:
>>
>>> On Thu, 06 Mar 2025 17:04:06 GMT, cyclintom <cyclintom@yahoo.com>
>>> wrote:
>>>
>>>> On Wed Mar 5 16:08:18 2025 Catrike Ryder  wrote:
>>>>> The chain ring guard came so I set about mounting the chain rings and
>>>>> the guard. I ordered new chain ring bolts because I didn't want to
>>>>> disassemble the old crank. The new inner bolts had hex deep down
>>>>> inside and I figure that was fine until I could not find a allen
>>>>> wrench that fit them. I tried both metric and standard and nothing
>>>>> fits. The bolts on my old crank take a #5 allen.
>>>>>
>>>>> Does anyone know what's going on?
>>>>>
>>>>> I ordered another set of 16mm bolts and they look like they have a
>>>>> larger hex that's not set deep inside it.
>>>>
>>>>
>>>>
>>>>
>>>> Modern crank bolts can be made out of aluminum and instead of allen 
>>>> bolt may be Torx. Usually you can use the camera option on your 
>>>> smart phone to see close enough to identify this.
>>>
>>> Aluminum crank bolts are for weight weenies, and I did try a torx
>>> driver on them. The bolts were mismanufactured. I tossed them. Not
>>> worth trying to return them.
>>
>> They also may have been misordered.  There are Torx and Torx Plus
>> heads.  Common Torx heads have a 15 degree drive angle, while Torx
>> Plus has a zero degree drive angle.
>> <https://i.imgur.com/dvIdABh.jpeg>
>>
>> "The Evolution of Torx: From Torx to Torx Plus and Beyond"
>> <https://www.youtube.com/watch?v=EhRcWaEkHtE>  (7:52)
>>
> 
> Standards are wonderful. We ought to have lots of them.
> 

I'm living that life

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