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RADBMX.CO.UK  |  Technical & Reference Section  |  Tech and Restoration  |  One piece crank failure?
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Author Topic: One piece crank failure?  (Read 1533 times)

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Offline mamadirt

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One piece crank failure?
« on: March 30, 2015, 08:05 PM »
Not been on here for a while but the urge for something old and rusty to rag through the woods has brought me back  ;D

Just ordered a load of bits to rebuild an old Dyno VFR and I now have crank paranoia  :-\  Particularly wanted a pair of 165s as that's what I run on my other bikes but the cheapo ones I've bought have a tack-welded (for want of a better description) sprocket tab and I'm reminded of a painful knee/handlebar encounter when a previous similar crankset gave out on my old Curtis.



I'm only light but how common is sprocket tab failure? Not worth putting a three piece set on but should I ditch those and get a forged OPC?

Offline Gnarlyscoots

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Re: One piece crank failure?
« Reply #1 on: March 30, 2015, 08:13 PM »
You pays your money, and you takes your chance  :)

Cheap is exactly that buddy. I had a mate back in the day who was running around on a Strattan Aero. He had a cheap Suntour copy stem on it and one day over the jumps, he took off, landed, and the stem cracked off from the quill. It left jagged edges and ripped his stomach and chest open as he went over the bars  :yahoo_silent:

Cheap is just that. I would buy a good quality Sugino, Takagi or SR one piece if I were you  :daumenhoch:
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Offline Devilock

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Re: One piece crank failure?
« Reply #2 on: March 30, 2015, 08:14 PM »
Are they Landar?

Why are you using 165? Just get a 175 Sugino.

Offline mamadirt

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Re: One piece crank failure?
« Reply #3 on: March 30, 2015, 09:04 PM »
Ouch Gnarlyscoots!

No, not Landar Devilock - they're stamped with a weird curly A and YL165 so cheap cr@p I guess.  175s just feel weird to me as I'm used to 165s on my MTBs and I'm only little.  I've managed to find 170s with a forged tab so may go for those to be on the safe side.

Cheers, both!

Offline bobbbbsy

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Re: One piece crank failure?
« Reply #4 on: March 30, 2015, 09:18 PM »
165 are for little ones as they spin up easier. 165 s usually come on kiddy toystore bikes .  :D

some fixie clowns and track riders use them for the same reason .

generally people with no legs .  :LolLolLolLol:

i should be selling a opc and bb tomoz after i get a bike . i ll send you some pics . they are black but may be shiny underneath .

Offline mamadirt

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Re: One piece crank failure?
« Reply #5 on: March 30, 2015, 09:35 PM »
Ha ha!  I am a little one  . . .  5'2" in me Chucks  ;D

Offline Devilock

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Re: One piece crank failure?
« Reply #6 on: March 30, 2015, 09:39 PM »
Ha ha!  I am a little one  . . .  5'2" in me Chucks  ;D

You're 5' taller than some on here...

Offline bobbbbsy

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Re: One piece crank failure?
« Reply #7 on: March 30, 2015, 09:47 PM »
most of them are 5 ft 2 horizontally . while standing.   :LolLolLolLol:

Offline insectbones

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Re: One piece crank failure?
« Reply #8 on: March 30, 2015, 09:51 PM »
I ran 165's on my motomag, but i'd just go with a decent 175 by already mentioned brands, easy enough to find  :daumenhoch:

Offline mamadirt

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Re: One piece crank failure?
« Reply #9 on: March 30, 2015, 10:35 PM »
 :LolLolLolLol:

Cheers all!  I'll keep an eye out for something decent.  Can't afford to give my knees another bashing at my age  ;D

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Re: One piece crank failure?
« Reply #10 on: March 30, 2015, 11:52 PM »

Offline bodamus

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Re: One piece crank failure?
« Reply #11 on: March 31, 2015, 01:01 PM »
Right I have a proper 165mm chrome 1 piece crank it's a hollow one Takagi I think from the mid 1980's in very nice condition if your interested I will dig it out for you :daumenhoch:

Offline mamadirt

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Re: One piece crank failure?
« Reply #12 on: March 31, 2015, 02:39 PM »
Damn, me and my impatience.  That sounds perfect bodamus but I've just ordered a forged 170mm jobbie.  I'll see how it goes but I may well be in touch later  :)

Offline bodamus

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Re: One piece crank failure?
« Reply #13 on: March 31, 2015, 08:44 PM »
OK mate :)


Offline monteryroom

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Re: One piece crank failure?
« Reply #15 on: April 09, 2015, 10:24 PM »
i see you've ordered some. to anyone else looking for a opc, odyssey excaliburs are great.

Offline BMX1973

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Re: One piece crank failure?
« Reply #16 on: April 11, 2015, 07:43 PM »
 :daumenhoch:

i see you've ordered some. to anyone else looking for a opc, odyssey excaliburs are great.

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