Cassette Increase
jayhorner7
Posts: 4
in Workshop
Hi All
I currently have a 9 speed Triple Chain ring ( 50-39-30 ) with a Shimano 105 RD 5600 GS (12-26).
Is it possible to change my cassette to a 11- 30 (or even a 32) keeping the same rear mech. I believe the max this mech can handle is 37-39t
Thanks
Jay
I currently have a 9 speed Triple Chain ring ( 50-39-30 ) with a Shimano 105 RD 5600 GS (12-26).
Is it possible to change my cassette to a 11- 30 (or even a 32) keeping the same rear mech. I believe the max this mech can handle is 37-39t
Thanks
Jay
0
Comments
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According to this the largest cassette sprocket it can manage is a 27 tooth one so no:
https://si.shimano.com/pdfs/si/SI-5VN0B-001-ENG.pdf
That would also make sense given that the total capacity is 37 teeth, seeing as there's already a 20 tooth gap with your triple you should be able to squeeze in a 11-28 cassette but nothing bigger than that.
I'd probably just stick with your 12-26.0 -
You would need to swop your RD to a 5701 GS to go to a 30/32T low sprocket.0
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Many thanks for the responses, much appreciated.0
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Get one of these. There’s no need to get a longer cage RD then.
https://www.sigmasports.com/item/Wolf-Tooth-Components/Road-Link-Rear-Derailleur-Hanger/DOQG
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No they shouldn't.brundonbianchi said:Get one of these. There’s no need to get a longer cage RD then.
https://www.sigmasports.com/item/Wolf-Tooth-Components/Road-Link-Rear-Derailleur-Hanger/DOQG
"Triple chainrings are not supported (medium cage rear derailleurs cannot accommodate that big of a change)"
"What the RoadLink does not do is expand your derailleur's capacity"0 -
What? His advice is incorrect?0
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So it looks as though short term I can change to a 11-28 or a new long cage derailleur.
Would I see much of a difference from a 26 to a 28 on the hills (8-15%)?0 -
It’s my age and arthritic knees that I’m forced to use my granny gear 😄. I live and ride in the Yorkshire Dales so the odd steep hill is a bit if a challenge.0
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Rear derailleurs have a maximum rear sprocket size and a maximum chain wrap ( i.e. the amount of slack chain they can take up). A road Link gadget will only allow a bigger rear sprocket ,it will not give you any more chain wrap. However you are never going to use small sprockets and your small chainring together so as long as your chain is long enough for big sprocket and big chainring ,lack of chain wrap is not a problem. I know you are not going to use big/big either but if you do by accident and your chain is not long enough you will have a disaster. If you use small/small by accident you just have a droopy chain.joe_totale-2 said:
No they shouldn't.brundonbianchi said:Get one of these. There’s no need to get a longer cage RD then.
https://www.sigmasports.com/item/Wolf-Tooth-Components/Road-Link-Rear-Derailleur-Hanger/DOQG
"Triple chainrings are not supported (medium cage rear derailleurs cannot accommodate that big of a change)"
"What the RoadLink does not do is expand your derailleur's capacity"
I ran a 12/29 cassette and 50/39/28 chainset with a Campag centaur short cage rear mech. It worked fine.0