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Chain Ring replacement

ball_of_blue · 2014-10-31 19:55:08

Hi I am currently driving the below evanscycles.com/products/specialized/tarmac-2013-road-bike-ec040970 I am pretty new to DIY biking so some advice is badly need. I have damaged the large front chain ring on the Chainset:FSA Gossamer BB30Chainrings:52/36. I have started to look on line to get a replacement but getting…

31-10-2014 8:55pm

#1

ball_of_blue

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Hi I am currently driving the below
evanscycles.com/products/specialized/tarmac-2013-road-bike-ec040970
I am pretty new to DIY biking so some advice is badly need. I have damaged the large front chain ring on the Chainset:FSA Gossamer BB30Chainrings:52/36. I have started to look on line to get a replacement but getting seriously lost. Any advice on what a suitable replacement would be hugely helpful !!. Either a direct swap or upgrade considered. Thanks in advance

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#2 31-10-2014 9:44pm

Keep_Her_Lit

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My commuter has a FSA chainset and I sourced replacements from bike24. They have a reasonable selection.

I believe your chainset is a compact, which means you need 110mm BCD chainrings (BCD: Bolt Circle Diameter). This refers to the diameter of the circle on which the fixing bolts lie ... the bolts which attach the chainring to the crank arm. Standard chainsets have 130mm BCD. Double check this before ordering.

I think this one might be suitable for your bike (but don't take my word for it!):

http://www.bike24.com/1.php?product=66435;dbp=6;page=1;content=8;navigation=1;menu=1000,4,122;mid=77

FSA uses a designation which indicates the compatibility with shifting components and chain width, e.g.
N10 : Shimano 10/11-speed, SRAM 10-speed
Check the Fact Sheet tab on the bike24 page for this info. I believe a 10 speed chainring will work fine with a 9-speed groupset (assuming your rear cassette has 9-sprockets).

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#3 31-10-2014 9:44pm

countrykid

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ball_of_blue wrote: »

Hi I am currently driving the below
evanscycles.com/products/specialized/tarmac-2013-road-bike-ec040970
I am pretty new to DIY biking so some advice is badly need. I have damaged the large front chain ring on the Chainset:FSA Gossamer BB30Chainrings:52/36. I have started to look on line to get a replacement but getting seriously lost. Any advice on what a suitable replacement would be hugely helpful !!. Either a direct swap or upgrade considered. Thanks in advance

look at the ring closely...
is there a number printed "110bcd" or "130 bcd" ?

this one for 110bcd
http://www.ebay.co.uk/itm/BBB-Compactgear-5-Bolt-110-BCD-Alloy-Chainring-BCR31-/350354771199?pt=UK_sportsleisure_cycling_bikeparts_SR&var=&hash=item5192c58cff

this one for 130 bcd...
http://www.chainreactioncycles.com/ie/en/fsa-k-force-super-road-chainring/rp-prod120793

or
http://www.ebay.co.uk/itm/FSA-Super-Road-S10-52T-Chainring-130-BCD-Shimano-Double-Chainset-Compatible-/201029456967?pt=UK_sportsleisure_cycling_bikeparts_SR&hash=item2ece4a1447

if your not "handy" with the mechanics of changing this then dont...you will impale yourself on the teeth!!

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#4 31-10-2014 10:10pm

ball_of_blue

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right its 110 bcd alright. Thanks for the replies:) Appeerntly thet are not that common or that good ? not sure sound like a job for the local bike man thank you

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#5 31-10-2014 10:12pm

coastwatch

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I think "Keep Her Lit" is right, it looks like an FSA Pro Compact Crankset which has 110 bcd, same as this,
http://www.ebay.com/itm/FSA-Gossamer-Mid-Compact-Crankset-BB30-52-36-NEW-/181570066215.

The large chainring is 52 tooth, so you need a 52t / 110bcd 9/10 speed Chainring.

It doesn't have to be an FSA, but here's a few more options,
http://www.totalcycling.com/en/FSA-Pro-Compact-Outer-Chainring---52T/m-17991.aspx

http://www.ebay.co.uk/itm/FSA-Chainring-CNC-Chainrings-All-Sizes-For-Road-MTB-Cycling

http://www.ebay.ie/itm/BBB-CompactGear-Chainring-52T-Shimano-BCR-31-9-10-Speed-110mm

Not difficult to replace, the only tool you need is a 5mm allen key

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#6 31-10-2014 10:27pm

Pinch Flat

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edit - check the fsa website http://www.fullspeedahead.com/products/chainrings-road/gossamer-pro-chainrings-bcd-130mm-5339t-2/

once it's compatible with 9/10/11 speed (will be written on the side) any of the links above will provide a replacement - perhaps not fsa but some other quality makes out there - I personally find the bbb ones great, but if you want a match it should be possible to source one

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#7 31-10-2014 11:30pm

Cee-Jay-Cee

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coastwatch wrote: »

Not difficult to replace, the only tool you need is a 5mm allen key

Isn't there some sort of tool needed to lock the rear of the chainring bolt to prevent it from turning while you loosen it from the front??

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#8 01-11-2014 12:41am

mossym

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throwing it in here as an option instead of messing around with rings.
http://www.boards.ie/vbulletin/showthread.php?p=91721196

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#9 01-11-2014 1:00am

Pinch Flat

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Cee-Jay-Cee wrote: »

Isn't there some sort of tool needed to lock the rear of the chainring bolt to prevent it from turning while you loosen it from the front??

Yeah you can get a special tool. I use a large flat head screw driver on the reverse side. Don't over tighten as the nuts are easily sheared (as I learnt previously)

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#10 01-11-2014 10:35pm

ball_of_blue

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so was down in the local bike shop to ask with large chain ring in hand to see what the damage was. The verdict nothing wrong partially worn at best. Looks like the gear slipping I was experiencing is related to something else. Thanks for the help I am sure I will be back !!!

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