130BCD 52/36...?

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phallenthoul
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by phallenthoul

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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Mario Jr.
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by Mario Jr.

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.

by Weenie


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stephen@fibre-lyte
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by stephen@fibre-lyte

It isn't physically possible to fit a standard 36 tooth chainring on a 130bcd, sorry :(

mattr
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by mattr

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 ;)

phallenthoul
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by phallenthoul

ok thanks for the help guys.

headwind816
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by headwind816

I wonder what you are up to? I new NEO build option?

phallenthoul
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by phallenthoul

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.

headwind816
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by headwind816

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.

SpoonMan
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Location: Adelaide, Australia

by SpoonMan

I've got 52/36 Q Rings on my 130BCD Dura-Ace 7800 cranks...
2011 Scott Addict R3 (DA groupset, Tune Skyline RR wheelset, Rotor 52/36 Q-Rings)
2008 Giant Trinity A1 (cheapass 50mm carbon clinchers)
No easy road goes anywhere worth going

mattr
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by mattr

SpoonMan wrote:I've got 52/36 Q Rings on my 130BCD Dura-Ace 7800 cranks...
No you don't.

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Mattias Hellöre
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by Mattias Hellöre

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.
Experimental Prototype


CarpetFibre
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by CarpetFibre

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...

by Weenie


headwind816
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by headwind816

Yep, I am lost but that is okay ... learned something new (once I sort out what you said).

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