Can I change

[gb155]

The rings on this to a 53/39

if so would this be ok

http://cgi.ebay.co.uk/FSA-Carbon-Pro-Outer-Chainring-BCD-130-53T-Chain-Ring-/130481502114?pt=UK_sportsleisure_cycling_bikeparts_SR&hash=item1e614db7a2

Thanks everyone

 

[fossyant]

No. That's a compact chainset, so you'd need new cranks and rings. The BCD is different.

Come on, what's the new bike ?

 

[gbb]

The FSA crankset will be a compact 50/34 so a BCD of 110. The chainrings you're looking at are 135...so no.

You can get anything up to a 40T on 100 BCD for the inner, not sure what sizes they do above 50 on the outer.

 

[fossyant]

Compacts are 110 BCD, Shimano Standard is 130 and Campag Standard is 135.

You shouldn't need to change really - you need to pedal quicker. 50 x 12 is bigger than 53 x 13 or 50 x 11 vs 53 x 12.

 

[gb155]

Compacts are 110 BCD, Shimano Standard is 130 and Campag Standard is 135.

You shouldn't need to change really - you need to pedal quicker. 50 x 12 is bigger than 53 x 13 or 50 x 11 vs 53 x 12.

Ok

Cassette was a 13T, so I ordered a 11T, cant really afford a FSA SLK just yet, but as its BB30 there isnt much option out there at the moment

 

[RecordAceFromNew]

Ok

Cassette was a 13T, so I ordered a 11T, cant really afford a FSA SLK just yet, but as its BB30 there isnt much option out there at the moment

Am not sure why you want to swap the chainset, but for 110BCD T.A. e.g. makes any size chain ring down to 33T for inner and up to at least 61T for the outer, available from Spa and others.

 

[dan_bo]

I stuck a 52T Ring on a 110 chainset once and folded the bloody thing. Pace chainring- Forty bloody quid and I folded the frigging thing.

 

[Will1985]

You can safely put the thicker compact 52t chainrings on - FSA Super Road or Stronglight CT2 Crono. I've had a go on bigger normal rings but the flex is more obvious. Pros have been known to use 52/38 or 52/36 on compacts - far more versatile IMO rather than 2 cranks, but the issue is the stiffness of the outer ring.

 

[GrasB]

Actually 110BDC gives you more options so don't change the cranks. There are lots of options out there but these will probably do you:
http://www.dotbike.com/ProductsP2143.aspx?db_src=internal&db_med=7&db_cam=DPL
http://www.dotbike.com/ProductsP2466.aspx?db_src=internal&db_med=7&db_cam=DPL

 

[Deleted member 1258]

http://www.dotbike.com/ProductsP3593.aspx?utm_source=internal&utm_medium=site&utm_campaign=DDI

I used these rings when I changed the rings on my Verenti Kilmeston. I went from 34/50 to 42/48. 50/34 is too wide a range for me, 34 is to low, if I'd used the 34 on a club ride I would have been straight out the back, and a 48 is about as big as I can push round these days..

 

[gb155]

I have no idea what 110BDC means LOL


So i'd be ok to get a 52T biggie then ?

 

[Alien8]

I have no idea what 110BDC means LOL

BCD (Bolt Circle Diameter), and variants on the same theme, is the diameter of the circle that would be formed going through the centre of the chainring bolts. SJS have a nice diagram/table.

A compact chainset is 110mm, a regular double is 130mm (135mm Campag) and a track chainset 144mm.

For a given chainring size a smaller BCD will mean more chainring and less crank spider - hence you would tend to think that you'd get more flex from a 110mm BCD compared to a 130mm BCD for the same size chainring.

However, people seem to cope with big (>50T) chainrings on a 110mm BCD, and companies sell the rings, so I guess they won't normally fold-over like cardboard.

I'd have thought 52T 110BCD, with a bit of adjustment where your front mech is, will be fine.

 

[gb155]

BCD (Bolt Circle Diameter), and variants on the same theme, is the diameter of the circle that would be formed going through the centre of the chainring bolts. SJS have a nice diagram/table.

A compact chainset is 110mm, a regular double is 130mm (135mm Campag) and a track chainset 144mm.

For a given chainring size a smaller BCD will mean more chainring and less crank spider - hence you would tend to think that you'd get more flex from a 110mm BCD compared to a 130mm BCD for the same size chainring.

However, people seem to cope with big (>50T) chainrings on a 110mm BCD, and companies sell the rings, so I guess they won't normally fold-over like cardboard.

I'd have thought 52T 110BCD, with a bit of adjustment where your front mech is, will be fine.

Thanks For that

 

[GrasB]

only thing with large compact chainrings is make sure you don't get the lightweight stuff if you tend to grind. I've found that the 110BDC 54t TA Zephyr rings I linked to are stiffer than the 130BDC 54t SRAM red!