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35 Questions : 46 Answers

Q&A for Chainrings category

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I currently have FSA SL-K crank with 53 / 39 stsndard chain rings and I want to change to 50 / 34 compact chainrings. I am seeing only FSA Super or FSA Super T in that size on your website. Will these be compatible with my crankset?
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1 day ago
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can i fit an inner ring 34 or 30 teeth

can i fit an inner ring 34 or 30 tooth onto a ultrega 6700 130bcd. Need to change for some hill climbing
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6 days ago
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Answer: 
No; the bolt circle defines the minimum number of teeth that can be had in a chainring. For example, if you look at these 130mm chainrings, you'll find that 38 teeth is the smallest number of teeth available. It's not possible to make a chainring with fewer teeth because the chainring bolts would get in the way. So there's little to be gained by looking around for a 36 or 34 tooth 130mm bolt circle chainring. They don't exist because they can't exist. 33 is the smallest number of teeth for 110mm bolt circle (compact) rings, so to run something like a 34 on the inner you would need to switch down to a Compact crankset.

Changing your cassette ratio may offer you a better range for climbing, rather than having to change the whole chainset.
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5 days ago
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Fitting a double chainring on a Brompton

I have a pre 2013 Brompton with a 3 speed hub gear and a 44T chainring on which is a
guard fixed by 5 bolts with an approximate BCD of 120mm. I'd like to lower my gears by
fitting a second chainring (and change manually). Any ideas for a cheap and easy solution?
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2 months, 2 weeks ago
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Oldham,GB
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Answer: 
This would only be possible is you were to change the crankset for a double crankset and were willing to either carry two chains of varying lengths or have the patience to 'break' the chain every time you wanted to change the chainring it is running on.

This is because a hub gear has no derailleur to take up the chain slack, so once the chain retention is set, you cannot alter chainring sizes unless will to select one of the chain 'solutions' above.

If you would like to discuss this further; please contact our Technical Department below:

http://lnk.nu/chainreactioncycles.c...
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2 months, 2 weeks ago
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Chainrings Truvativ Noir XC 3.3

Hi,
I need A T44 and T32 and T22 chainring for my Truvativ Noir XC 3.3 crack (2009/2010).
Orange, black or silver color. What does fit of aaaallllll the chainrings?
Thanks Laura
2 months, 2 weeks ago
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Den Haag,NL
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Answer: 
The only option we have at present is the Race Face - Truvativ Fit 32T chainring, as below.
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2 months, 2 weeks ago
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I need to find the replacement INNER ring, which is a 32 tooth with 104mm bolt holes, I believe it is shimano part # Y1MM98130, I cannot find it on your website.
I have added the outer triple chainring from your website as a guide to the inner ring I require.
Regards Chris
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4 months, 4 weeks ago
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Orange,AU
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Answer: 
The FC-M770 chainrings are fully compatible with your crankset, which can be found below.
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Shimano XT M770 Middle Chainring
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Shimano XT M770 Inner Chainring
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4 months, 3 weeks ago
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Answer: 
you can use any star with BCD 104
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3 months, 1 week ago
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Chainrings

I have an Ultegra SG-X 50/34t FC-6750 compact set. Am I able to fit a 52 or 53t ring instead of the 50t? And if so, which will fit?
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6 months ago
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christchurch,NZ
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Answer: 
Unfortunately this would not be possible as the Bolt Circle Diameters are different between 'Compact' and 'Double' crankset gear ratios.

The chainrings cannot physically fit to the crankset.
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Answer: 
Shimano does not produce stars at 110mm (for a compact) more than 50T, but you can find and use other manufacturers. For example BBB or FSA. but pay attention to BCD = 110mm
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5 months, 3 weeks ago
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Truvativ 9 speed inner chain ring

Hi. I have a Boardman Road Comp. It runs a 9 speed Truvativ Elita chain ring (50/36). I want to swap the inner to a 34 tooth. Is there anything that will fit?
6 months ago
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Answer: 
Unfortunately at present we do not have a 130mm BCD chainring with a 34tooth count.
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Answer: 
You can choose from Shimano with BСD110mm example Tiagra or 105
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5 months, 3 weeks ago
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chainring

to replace sram chainring Would this fit a sram xo1 crankset 94mm
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7 months ago
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Rotorua,NZ
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Answer: 
This crankset requires a SRAM specific X-Sync chainring; options can be found below.
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Answer: 
yes, it should work, the main point - 94mm
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5 months, 1 week ago
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convert 2x10 to 1x10 (sram s2200)

Hi
I’m looking for the correct chainring (direct mount I guess) for my crank (sram 2200 / BB30 with a short spindle)
which one will work for me?

Thanks
7 months ago
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Laasby,DK
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Answer: 
We have two 'direct mount' options available at present which are listed below.

For a traditional mounted chainring, please supply the Bolt Circle (B.C.D.) to out Technical department as there are a few variations of this crankset.
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My new bike, Bianchi Intenso C2C Ultegra has compact chainrings and I would like to up spec to 52t and 38t. Currently the rings on the bike are FSA and the usual 50t and 34t combination. What do you advise?
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7 months ago
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Norwich,GB
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Answer: 
My advise is don't and then ask why would you. Do you feel you absolutely need to and can push a 52-11. I'm pretty sure praxis does a 53 ( maybe 52) in a compact bolt pattern. You could gain that big gear and and keep tne advantage of less overlap with the 34 allowing you lower gears and tighter shifts. Oh ya one ring would be way cheaper than a whole crankset
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7 months ago
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