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 Post subject: 130BCD 52/36...?
PostPosted: Sun Mar 10, 2013 11:35 am 
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Joined: Wed May 28, 2008 12:15 pm
Posts: 709
so a friend of mine wants to try semi-compact rings but not ready to replace the current crank yet.
I wonder if there is any 130BCM 52/36 rings out there? the smallest i can find is 52/38.
much appreciated :idea:

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 Post subject: Re: 130BCD 52/36...?
PostPosted: Sun Mar 10, 2013 11:45 am 
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Joined: Sat Jun 12, 2004 8:49 am
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Location: Denmark
Rotor makes 50 and 52 rings in 130, but I think 38 is the lowest you can go on 130bcd. You would need a smaller bolt diameter to go lower.


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 Post subject: Re: 130BCD 52/36...?
Posted: Sun Mar 10, 2013 11:45 am 


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 Post subject: Re: 130BCD 52/36...?
PostPosted: Sun Mar 10, 2013 12:54 pm 
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It isn't physically possible to fit a standard 36 tooth chainring on a 130bcd, sorry :(


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 Post subject: Re: 130BCD 52/36...?
PostPosted: Sun Mar 10, 2013 1:03 pm 
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Try something like a 105 compact, i paid under €100 for mine. Not a huge amount more than two good quality 130bcd rings (which would be around €60-70).
Tiagra is cheaper, but heavy enough to distort the curve of local space-time ;)


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 Post subject: Re: 130BCD 52/36...?
PostPosted: Sun Mar 10, 2013 2:23 pm 
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ok thanks for the help guys.

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 Post subject: Re: 130BCD 52/36...?
PostPosted: Thu Mar 14, 2013 2:20 pm 
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I wonder what you are up to? I new NEO build option?


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 Post subject: Re: 130BCD 52/36...?
PostPosted: Thu Mar 14, 2013 4:29 pm 
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it's not for my project. by "a friend" I actually mean a friend..not the kind of "friend" when you talk to a shrink :wink:
He is about to upgrade groupset on his Venge from old Red to 9070. Decided to go with Gravitas crank but not sure what BCD.
He likes how standard rings ride but is tempted to try semi compact. It would be nice if 52/36 is available for 130BCD.

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 Post subject: Re: 130BCD 52/36...?
PostPosted: Thu Mar 14, 2013 4:36 pm 
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LOL. I agree it would be nice. I searched high and low for a 52/36 combo in 130BCD; alas, I gave up and purchased a 110BCD spider for the SLSI ... still on the hunt for the best (performance:cost) combo to install.


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 Post subject: Re: 130BCD 52/36...?
PostPosted: Fri Mar 15, 2013 2:18 am 
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Location: Adelaide, Australia
I've got 52/36 Q Rings on my 130BCD Dura-Ace 7800 cranks...

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2011 Scott Addict R3 (DA groupset, Tune Skyline RR wheelset, Rotor 52/36 Q-Rings)
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 Post subject: Re: 130BCD 52/36...?
PostPosted: Fri Mar 15, 2013 7:49 am 
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Joined: Fri May 25, 2007 6:43 pm
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SpoonMan wrote:
I've got 52/36 Q Rings on my 130BCD Dura-Ace 7800 cranks...
No you don't.


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 Post subject: Re: 130BCD 52/36...?
PostPosted: Fri Mar 15, 2013 8:42 am 
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Location: Insjön, SWEDEN
I make rings for a living and there´s no possibility to fit anything less than a 38 on a 130BCD crankset, especially not oval.
110 is around 33 as lowest.

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 Post subject: Re: 130BCD 52/36...?
PostPosted: Sat Mar 16, 2013 12:36 am 
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:exactly:


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 Post subject: Re: 130BCD 52/36...?
PostPosted: Mon Mar 18, 2013 10:02 am 
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Yeah the other thing that people forget on that basis is that the the smallest Osymetric or Rotor Q ring you can get on a given BCD is larger than a round ring, because the smallest diameter section of the ring can only be 38T or 33T for 130 and 110 BCD respectively. So for instance 42T is the smallest Osymetric you can get on a 130BCD crankset - it's 38T at the smallest diameter and 46T at the largest, so 42T average. Sorry if I lost some people...


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 Post subject: Re: 130BCD 52/36...?
PostPosted: Mon Mar 18, 2013 2:56 pm 
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Yep, I am lost but that is okay ... learned something new (once I sort out what you said).


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 Post subject: Re: 130BCD 52/36...?
Posted: Mon Mar 18, 2013 2:56 pm 


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