Gearing

[TiBones]

Hey there, can anyone help? I run a 52t big ring on a Sora Triple front group. I find that I run out of gearing on even a small downhill and would like to be able to pedal a bit more. Is there, and can I fit, a bigger ring to the existing group without having to change the FR or other components.

 

[Delgado]

Dont think you can! I could not change the middle ring from a 42 to a 39!! Rather alter your cassette ratio? Surely a 52-11 will be more than enough?

[Pantani]

get a 11-23/25 cassette or a 53t chainring on the front. most people ride a 53t chainring. you should be able to change it...

[Red Zone]

If you have a clamp on FD you would just have to move this up the tube a bit. a easier and cheeper option is Delgado's suggestion, put a new cluster on the back with an 11 tooth.

[Gman1834]

 

 

What cassette are you running, a change on the cassette will make more of a difference than a bigger front gear.

 

 

Gear chart using KPH @ 90 RPM
For 700 X 20 / 20-622 tire with 175 mm cranks
With 10-speed 11-12-13-14-15-16-17-19-21-23 Cassette
	53	1.90%	52
11	54.3		53.2
9.10%
12	49.7		48.8
8.30%
13	45.9		45.1
7.70%
14	42.6		41.8
7.10%
15	39.8		39
6.70%
16	37.3		36.6
6.30%
17	35.1		34.5
11.80%
19	31.4		30.8
10.50%
21	28.4		27.9
9.50%
23	26		25.5

 

Gman18342008-11-17 01:07:07

[TiBones]

Thanks Guys, it seems as though a visit to the LBS is now in order. Watch this spot for a casette/ring for sale!!

[Tankman]

What cassette are you running' date=' a change on the cassette will make more of a difference than a bigger front gear.

Gear chart using KPH @ 90 RPM
For 700 X 20 / 20-622 tire with 175 mm cranks
With 10-speed 11-12-13-14-15-16-17-19-21-23 Cassette
	53	1.90%	52
11	54.3		53.2
9.10%
12	49.7		48.8
8.30%
13	45.9		45.1
7.70%
14	42.6		41.8
7.10%
15	39.8		39
6.70%
16	37.3		36.6
6.30%
17	35.1		34.5
11.80%
19	31.4		30.8
10.50%
21	28.4		27.9
9.50%
23	26		25.5

[/quote']

 

Gman, what site did you use for this chart.

I recently changed my compact crank 50 to a 52, but left the 34, would like to know what difference that makes? still running a 11/21 cassette

Tankman2008-11-17 04:18:41

[Gman1834]

 

What cassette are you running' date=' a change on the cassette will make more of a difference than a bigger front gear.

 

Gear chart using KPH @ 90 RPM
For 700 X 20 / 20-622 tire with 175 mm cranks
With 10-speed 11-12-13-14-15-16-17-19-21-23 Cassette
	53	1.90%	52
11	54.3		53.2
9.10%
12	49.7		48.8
8.30%
13	45.9		45.1
7.70%
14	42.6		41.8
7.10%
15	39.8		39
6.70%
16	37.3		36.6
6.30%
17	35.1		34.5
11.80%
19	31.4		30.8
10.50%
21	28.4		27.9
9.50%
23	26		25.5

[/quote']

 

Gman, what site did you use for this chart.

I recently changed my compact crank 50 to a 52, but left the 34, would like to know what difference that makes? still running a 11/21 cassette

 

How does the front derailleur work, what groupset are you running.

where did you get a compact 52?

 

http://sheldonbrown.com/gears/

 

[Tankman]

I have a Most compact crank 50/34, came with new Pinarello

Ultegra SL derailleurs.

I saw on Most website that there are compact sets of 52/36 available.

After some investigation and a lot of trips to cycle shops, I found that the BCD needs to be 110mm instead of the normal 130mm, otherwise it does not fit - to big

Then I found a FSA 52 ring with 110mm BCD!!

[Tankman]

BCD = Bolt Circle Diameter

[Gman1834]

Cool, now to save for a compact crank, and then to start looking for a 52 or 53 110mm BCD Blade.

[Tankman]

Looks like FSA would be the easiest to get

http://www.winstanleysbikes.co.uk/product/5863/FSA_110mm_BCD_Road_Chainrings

[TiBones]

Thanks all! So.... I've organised a 11-23 on the back and a 53 big blade for the front. Watch out Jan Ulrich!!